GME GX875 User manual

GX875 INSTRUCTION MANUAL 1
INSTRUCTION MANUAL
MARINE RADIO
Handheld VHF Radio
GX875
PRINTING SPECIFICATIONS: GX875 IM
Flat size: 266 x 157 Folded to 133W x 157H mm, 36 Pages,
Stitch with 2 wires
Stock: 90gsm + Gloss Laminiate
Print: Colour - CMYK
Finishes: Gloss laminate
Part Number: 404101 Drawing Number: 53222-1

2 INSTRUCTION MANUAL GX875
INTRODUCTION.....................................................3
FEATURES............................................................. 3
SUPPLIED WITH....................................................3
OPTIONAL ACCESSORIES......................................3
CAUTIONS ...............................................................3
RF Radiation Prole ...........................................4
RF Radiation Safety ...........................................4
OPERATING RULES ...............................................5
OPERATING REQUIREMENTS................................ 5
RANGE ..................................................................5
MARINE MOBILE SERVICE IDENTITY (MMSI)........ 5
CONTROLS ............................................................6
LCD ICONS ............................................................ 7
KEY FUNCTIONS ................................................... 8
OPERATION...........................................................9
Multi-Function Knob ...........................................9
Power On/O.......................................................9
Volume ................................................................9
Squelch................................................................9
Channel ...............................................................9
Backlight .............................................................9
Transmitting........................................................9
Key Lock............................................................10
Dual Watch ......................................................10
Triple Watch......................................................11
Channel Memories ............................................11
Scan Modes.......................................................11
Torch .................................................................13
Record/Play Voice .............................................13
Shock Wave Feature.........................................14
Weather Channels (Us & Canada) .....................14
Weather Alert Function (Us & Canada) ............14
Private Channels ...............................................15
GPS RECEIVER ......................................................15
Waypoints.........................................................15
DIGITAL SELECTIVE CALLING (DSC).....................17
DSC and GPS .....................................................17
User MMSI (Marine Mobile Service Identity) ....17
DISTRESS CALLS .................................................18
ATIS.....................................................................24
MAIN MENU OPTIONS .......................................25
VHF OPERATION .................................................27
GPS SETUP.......................................................... 27
ATIS OPERATION.................................................28
DSC OPERATION .................................................28
SYSTEM CONFIGURATION .................................. 28
CHARGING THE BATTERY ................................... 28
INTERNATIONAL MARINE VHF CHANNEL
AND FREQUENCIES.............................................29
US MARINE VHF CHANNEL AND FREQUENCIES.32
CANADIAN MARINE VHF CHANNEL
AND FREQUENCIES.............................................35
SPECIFICATIONS..................................................40
GME CONTRACT WARRANTY
AGAINST DEFECTS.............................................. 43
CONTENTS

GX875 INSTRUCTION MANUAL 3
INTRODUCTION
Congratulations on purchasing this GME fully featured VHF
marine radio. Your GX875 has been built to offer excellent
value by combining advanced features, great design and
manufacturing quality. To ensure you are familiar with the
operation and features of your audio, and to obtain the best
performance, please read this manual thoroughly before
operation.
FEATURES
• Waterproof to IPX8
• Man Overboard Alarm Function
• Floats with Auto-Flashing LCD if dropped overboard
• Integrated 48 Channel GPS Receiver
• 5/3/1 watt Switchable Power
• Large Dot-Matrix LCD
• Private Channel Facility
• Programmable Scan, Priority Scan, Dual and Tri Watch
• All International, US and Canadian Marine VHF Channel
Sets.
• Integrated 4000 mAh Lithium Polymer Battery
• USB-C Charge Port
SUPPLIED WITH
• GX875 DSC Marine Radio
• Belt Clip
• 5V AC/DC Adaptor
• USB-C Charge Cable
• Wrist Strap
• High Gain Flexible Antenna
OPTIONAL ACCESSORIES
• MB046 - Belt Clip
• PS006 - AC Adaptor for GX865/GX875
• AE4024 - Replacement Antenna Suits GX800, GX850,
GX865, GX875
CAUTIONS
IMPORTANT: READ ALL INSTRUCTIONS carefully and
completely before operating your radio and retain this manual
for future reference.
• This device complies with RF specifications when the device
is used at 25mm from your face front and 0mm from your
body.
To maintain the waterproof integrity of the radio;
• ENSURE the antenna is firmly tightened to ensure a proper
seal is made with the case.
• NEVER attempt to disassemble the radio.
• NEVER connect the radio to a power source other than the
supplied battery. This may damage your product.
• NEVER use or charge your radio in a potentially explosive
atmosphere.
• NEVER replace the battery with an incorrect Type. Battery
is non-user serviceable and must be returned to GME or an
approved service center.
• DO NOT use your radio with a damaged antenna.
• DO NOT attempt to modify your radio in any way.
• ALWAYS charge your radio at normal room temperature.
• ALWAYS switch off your radio where notices restrict the
use of two-way radio or mobile telephones.
• AVOID storing or charging your radio in direct sunlight.
• AVOID storing or using your radio where temperatures are
below -15º C or above +55º C.
RF RADIATION PROFILE
Your radio is designed and tested to comply with a number
of national and international standards and guidelines
(listed below) regarding human exposure to radio frequency
electromagnetic energy. This radio complies with the IEEE
and ICNIRP exposure limits for occupational/controlled RF
exposure environment at operating duty factors of up to 50%
transmitting and is authorised by the FCC for occupational

4 INSTRUCTION MANUAL GX875
use only. In terms of measuring RF energy for compliance
with the FCC exposure guidelines, your radio radiates
measurable RF energy only while it is transmitting (during
talking in PTT mode), not when it is receiving (listening) or in
standby mode.
The device complies with SAR and/or RF field strength limits
of RSS-102 requirements.
RF RADIATION SAFETY
To ensure user health, experts from relevant industries
including science, engineering, medicine and health work
with international organisations to develop standards for safe
exposure to RF radiation. These standards consist of:
• United States Federal Communications Commission, Code
of Federal Regulations; 47CFR part 2 sub-part J;
• American National Standards Institute (ANSI)/Institute of
Electrical and Electronic Engineers (IEEE) C95. 1-1992;
• Institute of Electrical and Electronic Engineers (IEEE) C95.
1-1999;
• International Commission on Non-Ionizing Radiation
Protection (ICNIRP) 1998;
FCC Regulations
Federal Communication Commission (FCC) requires that all
radio communication products should meet the requirements
set forth in the above standards before they can be marketed
in the U.S, and the manufacturer shall post a RF label on the
product to inform users of operational instructions, so as to
enhance their occupational health against exposure to RF energy.
Part 15 Compliance
This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
• Consult your dealer or an experienced radio/TV technician
for help.
NOTE: Changes or modifications to this unit not expressly
approved by the party responsible for compliance could void
the user’s authority to operate the equipment.
EU Regulatory Conformance
As certified by the qualified laboratory, the product is in
compliance with the essential requirements and other
relevant provisions of the Directive 2014/53/EU. Please note
that the above information is applicable to EU countries only.
Declaration of Conformity
The information listed above provides the user with
information needed to make him or her aware of RF
exposure, and what to do to assure that this radio operates
within the CE exposure limits of this radio.
The device complies with RF specifications when the device
used at 25mm from your front face and 0mm from your body.
Third-party belt-clips, holsters, and similar accessories used
by this device should not contain any metallic components.
Body-worn accessories that do not meet these requirements
may not comply with RF exposure requirements and should
be avoided.
Maximum SAR Value (10g):0.459W/Kg.
OPERATING RULES
Priorities
• Read all rules and regulations pertaining to priorities and
keep an up-to-date copy handy. Safety and distress calls
take priority over all others.

GX875 INSTRUCTION MANUAL 5
• You must monitor Channel 16 when you are not operating
on another channel.
• False or fraudulent distress calls are prohibited under law.
Privacy
• Information overheard but not intended for you cannot
lawfully be used in any way.
• Indecent or profane language is prohibited.
OPERATING REQUIREMENTS
In Australia, any person operating a VHF marine radio should
possess at least a Short Range Operators Certificate of
Proficiency (SROCP) for VHF Radio Operations. Alternatively,
operators may choose to obtain a Long Range Operator
Certificate of Proficiency (LROCP) which covers the operation
of both VHF and MF/HF equipment.
Many TAFEs and marine organisations offer courses leading
to examination for the SROCP and LROCP although such
courses are not compulsory. Persons wishing to obtain the
SROCP or LROCP should first purchase a copy of the Marine
VHF Radio Operators Handbook which is essential reading for
every boat owner in Australia.
The Australian Maritime College (AMC) provides the marine
examination and certificate service on behalf of the ACMA.
The AMC can provide the details of organisations and
individuals offering courses and or conducting exams. For
further information visit: www.amc.edu.au
If you have obtained the SROCP you can operate your VHF
radio under the maritime ship class licence. You do not need
to apply for a class licence or pay any fees.
If operating your VHF radio under the LRSOP you will need to
apply to the AMCA for a Maritime License.
In New Zealand, operators of a VHF marine radio require a
Maritime VHF Operators Certificate (MVOC) and a callsign.
Please refer to www.maritimenz.govt.nz for further details.
Courses for the MVOC can be arranged through www.
boatingeducation.org.nz.
RANGE
The range of VHF transmissions depends on antenna height,
transmitter power and the terrain over which the signals
pass. For a 5 watt handheld radio like the GX875, ship
to ship communications up to 5 nautical miles should be
possible. Using an external antenna should allow ship to ship
communication of 8 nautical miles or more. Ship to shore
ranges will often be greater due to the increased height of
the shore antenna.
MARINE MOBILE SERVICE IDENTITY
(MMSI)
The MMSI is a 9-digit number used to identify a radio that is
capable of using Digital Selective Calling (DSC). The number
is used to selectively call other vessels. To setup and use the
DSC feature on your radio: Please refer to the ‘DSC’ section
of this manual.
USER MMSI
To use the DSC feature you must be registered with the
appropriate licensing authority (AMSA in Australia) who
will issue you with your unique user MMSI number. Having
a registered user MMSI means you can be identified much
quicker in an emergency. Once you have obtained your MMSI
number you can then enter this into your GX875 to enable
DSC operation. Your GX875 is shipped from the factory
without a user MMSI number. It is up to the user to obtain a
valid MMSI from the appropriate licensing authority.
NOTE: If you don’t register for a User MMSI, you can still
receive DSC distress calls from other vessels however you
cannot send a DSC call.
GROUP MMSI
The Group MMSI is used for DSC Group Calls. A Group Call
provides a method for contacting a group of vessels with a
common interest, for example, alerting all yachts in a race to
announce a change in the race conditions. Any number with
a leading zero can be used as a Group MMSI, and they do
not need to be registered, but the entity deciding on a Group
MMSI must use the MID of the host country or country of

6 INSTRUCTION MANUAL GX875
vessel registration (e.g. 503 in Australia).The Group ID should be based on a key vessel in the Group, and the recommended
system is to drop the last digit of the key vessel’s MMSI and place a zero in front.
For example, a fleet of vessels that has a lead vessel with a DSC User MMSI of 503080110 could use the Group MMSI of
050308011. This would then be programmed into all fleet vessels as the special event Group MMSI.
See ‘My MMSI ID Setup’ for details on entering a group MMSI.
CONTROLS
Multi-Function Knob
Power On / Off
Volume / Squelch / Channel
Menu Select
VHF Antenna
LCD Display
Push To Talk (PTT)
Speaker
Marine Torch Key
Red/White
Record / Play Voice
Loop Play
Private Channels
Weather Channels
CH16 / CH9
Torch
Distress Key
Microphone
Headset Socket
USB-C Socket
Call Menu
Set Waypoint
Goto Waypoint
High-Med-Low Power
Key Lock
Dual Watch
Triple Watch
Scan Memory
Battery Level
TX Power
RX Indicator
Dual Watch
Squelch Level
Volume Level
Record

GX875 INSTRUCTION MANUAL 7
LCD ICONS
Memory ModeBattery Level
TX Power
RX Indicator
Dual Watch
Squelch Level
Volume Level
Record
Key Lock
Memory Icon
Current Channel
Distress Mode
GPS Position
UTC TimeMonthDate
Message
Digital
Selective
Calling
WX
Alerts
Band

8 INSTRUCTION MANUAL GX875
KEY FUNCTIONS
KEY SHORT PRESS (< 3 SECS) LONG PRESS (> 3 SECS)
Multi-function Knob
Push to Power On
Rotate to adjust the Volume
Push once then rotate to adjust the Squelch
Push twice then rotate to select a Channel.
While scanning, rotate to select the Scan direction.
Push to Power Off
Torch On/Off Toggle Red/White Colour
Voice Recording: Enable/Disable Play List / Loop Play
Set Waypoint Go to Waypoint
Transmit Power
High – Medium – Low Key lock
Channel 16 (main priority channel) Channel 9 (secondary priority channel)
Dual Watch Mode Triple Watch Mode
Scan Priority Scan
Memory Mode Save/Delete memory Channel
Private Channels Weather Channels
Weather Alerts
DSC Call Menu Main Setup Menu
Shock Wave Function
Distress Menu Distress Alert Calling
+POWER
ON

GX875 INSTRUCTION MANUAL 9
OPERATION
MULTI-FUNCTION KNOB
The multi-function knob controls the On/Off, Volume, Squelch
and Channel functions with the Volume being the default. The
operation of these functions are described below:
POWER ON/OFF
Short press the multi-function knob to switch the unit On.
The backlight will be lit and a short beep will be heard. The
last selected channel, transmit power, volume and squelch
settings will be recalled. After a few seconds the backlight
will be extinguished.
Long press the multi-function knob to switch the unit Off.
VOLUME
To adjust the Volume, simply rotate the multi-function knob.
The volume level is displayed with values from 0 – 9.
After setting the volume, short press the multi-function knob
three times to exit or simply wait and the volume setting
mode will time-out after 10 seconds.
SQUELCH
To adjust the Squelch, short press the multi-function knob
once. The squelch level will be highlighted on the display.
Rotate the multi-function knob to adjust the squelch level
from 0 to 9. At level 0 the squelch is at minimum and the
receiver’s background noise will be heard.
Increase the squelch level only as far as required to keep the
receiver quiet when there are no signals present, while still
being able to receive weaker signals. Setting the squelch level
too high can reduce the receiver’s sensitivity and could cause
you to miss incoming calls.
After setting the squelch, short press the multi-function knob
twice to exit or simply wait and the squelch setting mode will
time-out after 10 seconds.
CHANNEL
To select Channels, short press the multi-function knob twice.
The channel number will flash. Rotate the multi-function knob
clockwise or counter clockwise to select the desired channel.
After selecting the channel, short press the multi-function
knob once to exit or simply wait and the channel selection
mode will time-out after 10 seconds.
BACKLIGHT
The backlight provides lighting for the display and keypad. It
operates automatically whenever any key (except the PTT)
is pressed and switches off a few seconds after the last
key press. The backlight on-time can be adjusted using the
System Config option in the Main Menu.
TRANSMITTING
To transmit, press the Push-To-Talk (PTT) key. The TX icon will
be displayed to indicate the radio is transmitting. Hold the
radio in front of you with the microphone about 3-5 cm from
your face and speak at a normal voice level. The microphone
is quite sensitive so it is not necessary to raise your voice or
shout. For best performance speak across the microphone
rather than directly into it.
Release the PTT when you have finished talking. The TX icon
will disappear.
Transmit Power
The GX875 has three transmitter power output settings: 5W,
3W and 1W.
Short press the key to cycle through the available
power settings. A corresponding 5W, 3W or 1W icon will be
displayed to the left of the channel number to confirm the
selected power setting.
NOTE: Some channels may be permanently set to 1W power
by default. Attempting to change the power setting on these
channels with the key will give an error beep, however,
some channels may allow you to overrule this restriction
temporarily – e.g. channels 13 & 67 in the US channel set.
To temporarily transmit using 5W on these channels, press
the PTT to transmit then hold down the key while
transmitting. As long as the key remains held, the
transmit power will be set to 5W and the 5W icon will be
displayed. When you release the key, the transmitter
power will return to the 1W power setting.

10 INSTRUCTION MANUAL GX875
Transmit Timeout Timer
The GX875 has a built-in time-out timer that automatically
limits transmissions to a maximum of 5 minutes of continuous
operation. This feature prevents accidental blocking of the
frequency should your PTT become jammed or be otherwise
pressed accidentally.
When the time-out timer activates, the transmission will stop
and the radio will return to receive mode. Normal operation
will be restored once the PTT is released.
PRIORITY
The GX875 supports two priority channels.
Priority Channel 16
Channel 16 is the international emergency channel. To
immediately switch to Channel 16, short press the key.
All previous functions such as scanning will be cancelled,
transmit power will be set to 5W and the P-CH icon will be
displayed.
Short press the key again to return to the last selected
channel. The P-CH icon will disappear.
Second Priority Channel
To immediately switch to the second priority channel, long
press the key. All previous functions such as scanning
will be cancelled, transmit power will be set to 5W and the
P2nd icon will be displayed.
To exit and return to the last selected channel, short press the
key twice. The P2nd icon will disappear.
Programming the Second Priority Channel
The second priority channel can be user-programmed to any
of the standard marine channels. Note the ‘second priority
channel’ programming feature is also available under VHF
Operation in the Main Menu.
To program your preferred channel into the second priority
channel using the key;
• Long press the key. The radio will switch to the
present second priority channel and P2nd will be displayed.
• Long press the key again. P2nd will disappear, Set
P-2nd CH will be displayed the channel number will flash.
• Rotate the multi-function knob to select the desired
channel.
• Long press the key again. P2nd will reappear and the
new channel will be stored as your second priority channel.
• To exit and return to the last selected channel, short press
the key twice. The P2nd icon will disappear.
DUAL WATCH
The Dual Watch function is a 2 channel scan feature where
the radio switches between Channel 16 and any other
selected channel. This allows you to monitor a working
or club channel while still being able to receive important
broadcasts on Channel 16.
To use the Dual Watch function;
1. Use the Channel function on the multi-function knob to
select the desired working channel. Short press the knob
when done.
2. Short press the key to activate Dual Watch. The DW
icon will appear and the channel number will quickly
alternate between 16 and the selected channel.
• If a signal is received on the selected channel, Dual Watch
will pause to allow the signal to be heard but will continue
to monitor channel 16 every 2 seconds resulting in short
breaks in the conversation. Once the signal has gone, Dual
Watch continues.
• If a signal appears on channel 16 the radio will lock onto
channel 16 and take priority over any signals on the
selected channel.
• If the weather alert function has been activated the
selected WX channel will also be monitored every 4
seconds.
To cancel Dual Watch, short press the key.

GX875 INSTRUCTION MANUAL 11
TRIPLE WATCH
The Triple Watch function is a 3 channel scan feature where
the radio switches between Channel 16, a selected channel
and the second priority channel. This allows you to monitor
2 channels while still being able to receive important
broadcasts on Channel 16.
To use the Triple Watch Function
1. Program your second priority channel as described earlier.
2. Use the Channel function on the multi-function knob to
select the desired working channel. Short press the knob
when done.
3. Long press the key to activate Triple Watch.
The TRIW icon will appear and the channel number will
quickly alternate between 16, the second priority channel and
the selected channel.
• IIf a signal is received on either the selected channel or
the second priority channel, the Triple Watch will pause to
allow the signal to be heard but will continue to monitor
channel 16 every 2 seconds resulting in short breaks in
the conversation. Once the signal has gone, Triple Watch
continues.
• IIf a signal appears on channel 16 it will take priority over
any signals on the other two channels.
• IIf the weather alert function has been activated the
selected WX channel will also be monitored every 4
seconds.
To cancel Triple Watch, short press the key.
CHANNEL MEMORIES
The Channel Memory feature allows you to program a
number of often-used channels into memory for quick access.
This can save you from scrolling through the entire list of over
50 channels just to access a few regular channels.
Note: The GX875 holds separate memories for the US,
International and Canadian bands.
To Program Memory Channels
1. Use the Channel function on the multi-function knob to
select the desired working channel.
2. Long press the key to toggle the channel in or out of
memory. The icon appears to the right of the selected
channel when that channel is in Memory.
3. Repeat steps 1 and 2 to add further channels to the Scan
Memory.
To access the Memory Channels
1. Short press the key. MEM will appear in the top-right
of the display.
Note: If there are no channels in memory, an error beep will
be heard.
2. Use the Channel function on the multi-function knob to
step through the Memory channels. Only channels stored in
the Memory will be displayed.
To exit back to normal mode, short press the key. MEM
will disappear from the display.
NOTE: You cannot add or remove memory channels while in
the memory mode. You must exit back to the normal mode
first.
SCAN MODES
All Scan
The All Scan function allows the radio to scan all channels for
signals. When a signal is detected the scan pauses to allow
the signal to be heard. Once the signal has gone the scan
resumes.
• To activate the All Scan function, short press the key.
The SCAN icon appears and the channel numbers change
rapidly as the radio scans for signals.
• To deactivate the scan function, short press the key
again. The SCAN icon disappears and the display returns to
normal operation.
To change the scan direction, rotate the multi-function knob
while scanning.
During All Scan, the scanned channel sequence is as follows.

12 INSTRUCTION MANUAL GX875
Priority Scan
Priority Scan is similar to All Scan except it regularly inserts
channel 16 into the scan. Signals received on channel 16
have priority over signals received on other channels.
• To activate the Priority Scan function, long press the
key. The PSCN icon appears and the channel numbers
change rapidly with channel 16 appearing predominantly in
the channel display area.
• To deactivate the Priority Scan function, short press the
key. The PSCN icon disappears and the display returns
to normal operation.
To change the scan direction, rotate the multi-function knob
while scanning.
During Priority Scan the scanned channel sequence is as
follows.
Memory Scan
Memory Scan allows you to scan your preprogrammed
memory channels. See ‘Channel Memories’ above for details
on programming memory channels.
To Activate Memory Scan
• Short press the key. MEM will appear in the top-right of
the display to confirm the radio is now in Memory mode
and the channel display will switch to a Memory channel.
Note: Only Memory channels are displayed while in
Memory mode.
• Short press the key. The radio will begin scanning the
Memory channels.
• To change the scan direction, rotate the multi-function
knob while scanning.
• To stop scanning; short press the key again.
• To exit the Memory mode, short press the key. MEM will
disappear from the display and the radio will return to the
last selected channel.
During Memory Scan, channels will be scanned as shown
below where M1, M2, M3 represents 1st, 2nd, 3rd memory
channels etc.
Priority Memory Scan
Priority Memory Scan is similar to memory scan except it
regularly inserts channel 16 into the scan. Signals received on
channel 16 have priority over signals received on the memory
channels.
To activate the Priority Memory Scan function
• Short press the key. MEM will appear in the top-right of
the display to confirm the radio is now in Memory mode
and the channel display will switch to a Memory channel.
Note: Only Memory channels are displayed while in
Memory mode.
• Long press the key. The PSCAN icon appears and the
memory channel numbers change rapidly with channel
16 appearing predominantly in the channel display area.
Signals received on channel 16 have priority over signals
received on the memory channels.
• To stop scanning; short press the key again.
• To exit the Memory mode, short press the key. MEM will
disappear and the radio will return to normal operation.
During Priority Memory Scan, channels will be scanned as
shown below where M1, M2, M3 represents 1st, 2nd, 3rd
memory channels etc.

GX875 INSTRUCTION MANUAL 13
TORCH
The torch uses a high-intensity bi-colour LED to provide an
efficient light source using minimal power from the radio’s
battery. The LED can toggled from white to red to suit the
operating environment. Use the white light for maximum
visibility or the red light to reduce glare and preserve night
vision.
The torch also features five lighting sequences - bright,
medium, dim, fast flash, and SOS flash.
To activate the torch
Short press the key to activate the torch and to cycle
through the lighting sequences. The torch switches off
between each sequence. The following sequence will be
observed.
Bright – Off – Medium – Off – Dim – Off – Fast Flash
– Off – SOS Flash – Off
To change the LED colour
Long press the key until the unit beeps. If the torch is on,
you’ll see the colour change. If the torch is off, the new colour
will be apparent the next time it’s switched on.
Note the torch colour can also be set via the System Config
option in the Main Menu.
RECORD/PLAY VOICE
When the Record function is activated, the GX875 can record
up to 60 seconds of voice from the 5 most recent incoming
calls. Recording starts automatically each time the squelch
opens.
To enable Recording
Short press the key. The REC icon appears.
To disable Recording
Short press the key. The REC icon disappears.
To Play the recording
Long press the key. A Play List appears showing 5
recording memories labelled REC1 – REC5 (fig 1). The number
in the right column represent the length of each recording in
seconds. A value of 00 indicates the memory is empty. If K
is displayed, that memory has been ‘write protected’ and will
not be overwritten by new recordings.
PLAY LIST
REC1 : 00’
REC2 : 00’
REC3 : K 00’
REC4 : 00’
REC5 : 00’
Exit Play Enter
Figure 1
1. Rotate the multi-function knob to select the desired
memory.
2. Press Play to play the recording in the selected memory.
3. Press Enter to access the Audio Play menu (fig 2).
4. Rotate the multi-function knob to select Keep Audio or not
Keep Audio .
i. Choose not Keep Audio to allow the selected memory
to be overwritten by new recordings
ii. Choose Keep Audio to protect that memory from
being overwritten. If Keep Audio is chosen, the
selected memory displays Kin the middle column on the
Play List screen..
5. Press Enter to confirm. will appear next to your
selection. AUDIO PLAY
Not Keep Audio
Keep Audio
Exit Loop Enter
Figure 2
• Press Loop to play the selected memory in a loop.
• Press Exit to return to the Play List.
• Press Exit again to return to normal operation.

14 INSTRUCTION MANUAL GX875
SHOCK WAVE FEATURE
If your GX875 becomes immersed in water, the Shock Wave
feature will assist in displacing any water trapped in the
speaker grill which can often be difficult to remove. This is
achieved by emitting a loud resonant tone.
To activate Shock Wave
• Ensure your radio is switched Off.
• Long press the key while short pressing the multi-
function knob. The radio will switch on and Shock Wave
will be displayed.
• Release the key to activate Shock Wave. A loud
tone will be emitted from the speaker. Hold the GX875 face
down to assist with displacing any water from the speaker
grill.
• When the speaker grill is free from water, press the
key again to stop the tone. Long press the multi-function
knob when complete to shut down the GX875.
It is recommended to use the Shock Wave feature whenever
the GX875 has been submersed in water.
WEATHER CHANNELS (US & CANADA)
The US NOAA weather channels are receive-only channels
providing weather information services in and around the
US and Canada. They are available only when the US or
Canadian Channel Sets are selected and are not available on
the International marine channels.
To access the weather channels while on the US or
Canadian channel sets:
• Long press the key. The radio will switch to the
weather channels and the WX icon will appear above the
channel number.
• Use the Channel function on the multi-function knob to
select the desired weather channel. Weather channels are
numbered 1 – 10.
To exit the weather channels and return to the normal
communications channels, short press the key.
WEATHER ALERT FUNCTION (US & CANADA)
When a weather warning is issued in your area the NOAA
weather service will transmit a weather alert tone on the
local weather channel. If you have enabled the weather
alert function, your radio will monitor your selected weather
channel for this tone and if received, your radio will emit a
short alarm tone and will automatically tune to the selected
weather channel. When enabled, the weather alert should
be detected in all the modes of operation including Standby,
Dual and Tri-watch and Scan etc.
To enable the Weather Alert Function;
• Long press the key to gain access to the weather
channels. WX will appear above the channel number.
• Use the Channel function on the multi-function knob to
select the desired weather channel. Weather channels are
numbered 1 – 10.
• Long press the key again. The weather alert function
will be enabled and will appear next to WX.
• Short press the key to return to normal operation.
will remain on the display.
When the weather alert function is enabled the radio will
check the selected weather channel every 4 seconds for a
weather alert tone. If detected, the radio will sound a short
alarm, the WX and icons will flash and the radio will
automatically tune to the selected weather channel to allow
you to hear the weather warning.
To disable weather alerts
Long press the key to access the weather channels (WX
is displayed) then long press the ey again. The icon
will disappear from the display.
Short press the key to exit back to normal operation.

GX875 INSTRUCTION MANUAL 15
PRIVATE CHANNELS
Private Channels are only programmed by the supplier. In
Australia and New Zealand, the radio must be returned to
GME for programming and must be supported with the
relevant ACMA documentation.
Private channels are only available for organisations that
have been officially allocated special frequencies by the
ACMA (Australian Communications and Media Authority).All
requests for private channel programming must be supported
by ACMA (Australian Communications and Media Authority)
documentation.
To access private channels (if fitted);
• Short press the key to select the private channel
mode.
• Use the Channel function on the multi-function knob to
select the desired channel.
Note: If the channel number displays there are no
private channels in your radio.
To exit the private channel mode and return to the normal
channel set, short press the key.
GPS RECEIVER
Your GX875’s GPS receiver receives real time satellite data
from the Global Positioning System to provide date, time and
your precise location. This can be used to provide position
information for DSC transmissions and for navigational data.
Instructions for setting up the following features can be
found in GPS Setup under the MAIN MENU (see further
below).
GPS Type
The GX875 supports both the US Global Positioning System
(GPS) and the Chinese BeiDou or BDS system. You can choose
to use either GPS, BeiDou or both systems together.
GPS Date and Time
When the GX875 is not receiving GPS signals, the screen can
be set to display the time and date in either UTC or Local
time format. To display in Local time, set the UTC Offset value
in hours to match your local region. For example, in Sydney
set the UTC Offset to +10:00 (or +11:00 during daylight
saving). You can also choose to switch off the display of date
and time.
GPS Satellite Status
The GPS Satellite status page provides a ‘sky view’ of the GPS
satellites showing their signal strength and location in the
sky. Press Menu to select GPS Satellite Status page
COG/SOG display
The COG/SOG page displays navigation information about
your vessel’s GPS position in Lat/Long, the date and time as
well as your speed (in knots or km/h) and course (in degrees)
across the ground.
WAYPOINTS
Creating Waypoints
1. Short press the key. The waypoint page is displayed
(fig 3).
2. Select New Entry to create a new waypoint then press
Enter. The waypoint entry screen appears (fig 2).
3. If your GX875 currently has a GPS fix, it will automatically
fill the latitude and longitude fields for you, so you will only
need to enter a name for the waypoint. In this case follow the
instructions immediately below.
If your GX875 does not have a GPS fix, you will need to
manually enter your waypoint’s latitude and longitude – Go
to step 4 further below.
i. The latitude field should contain your position’s latitude.
Press repeatedly to move the cursor to the end of that
line without changing anything. When Enter appears,
press Enter.
ii. The cursor will move to the longitude field and your
position’s longitude should appear automatically. Once
again, press repeatedly to move the cursor to the end of
that line without changing anything until Enter appears,
then press Enter.
iii. The cursor with then move down to the Input Name
field.

16 INSTRUCTION MANUAL GX875
iv. Rotate the multi-function knob to select characters for
your waypoint name then press to move to the next
character (fig 4). After entering your desired name, press
repeatedly to move the cursor to the end of the line until
Enter appears, then press Enter. Your waypoint is saved
and the display returns to the waypoint page (fig 5).
Figure 3 Figure 4
Figure 5
WAY POINT
New Entry
List
Exit Loop Enter
NEW ENTRY
Input Position
31°26.93562S
151°32.25530E
Input Name
WPT1--------
Exit Loop
NEW ENTRY
Input Position
31°26.93562S
151°32.25530E
Input Name
WPT1--------
Exit Loop Enter
4. If your GX875 does not have a GPS fix the latitude and
longitude in the Input Position fields will be blank
and you will need to enter the position of your waypoint
manually as follows;
i. Rotate the multi-function knob to select numbers for
your waypoint’s latitude then press to move to the
next number position. Repeat until you have completely
filled the top line. When Enter appears, press Enter.
ii. The cursor will move to the next line. Repeat step (i)
above to enter the desired longitude. When Enter
appears, press Enter.
iii. The cursor with then move down to the Input Name
field.
iv. Rotate the multi-function knob to select characters for
your waypoint name then press to move to the next
character. After entering your desired characters, press
repeatedly to move the cursor to the end of the line.
When Enter appears, press Enter. Your waypoint is
saved and the display returns to the waypoint page.
Listing Waypoints
1. Short press the key. The waypoint page is displayed.
2. Select List to view the saved waypoints then press Enter.
The waypoint list screen appears (fig 6).
3. Rotate the multi-function knob to select a waypoint then
press Enter (fig 7).
4. The options View, Edit and Delete are offered (fig 8).
5. Select Exit to return to the previous screen OR
• Select View then press Enter to view the waypoint’s
contents.
• Select Edit then press Enter to make changes to the
waypoint.
• Select Delete then press Enter to erase the waypoint.
When asked Are you sure?, select Yes or No.
Figure 6
WAY POINT
New Entry
List
Exit Loop Enter
List
WPT1
REEF
FISH
BUOY
Exit Loop Enter
List
View
Edit
Delete
BUOY
Exit Loop Enter
Figure 7
Figure 8

GX875 INSTRUCTION MANUAL 17
The GOTO Function
Use the GOTO function to navigate to a saved waypoint.
1. Short press the key then select List (fig 6) and press
Enter. The waypoint list appears (fig 7).
2. Rotate the multi-function knob to select the desired
waypoint then press Enter. The View, Edit and Delete
options are listed (fig 8).
3. Press Exit repeatedly to return to normal operation.
4. Now long press the key. The navigation screen
appears (fig 9) showing the position details of your
selected waypoint along with navigational data such as
distance and bearing from your present position to the
waypoint. SOG (Speed Over Ground) indicates your current
speed. COG (Course Over Ground) indicates your current
heading.
WTP1
POS: 31°26.93562S
151°32.25530E
DISTANCE: 26.4
BEARING: 136°
SOG: 12 KITS
COG: 136°
UTC: 1354
Exit Loop Enter
Figure 9
To navigate to the waypoint, adjust your course so that your
COG matches the bearing to the waypoint. The distance will
get smaller as you move towards the waypoint.
Note: If there are no waypoints saved in your radio, a long
press of the key will give an error beep.
DIGITAL SELECTIVE CALLING (DSC)
The Digital Selective Calling (DSC) feature on your GX875
uses pre-formatted digital messages instead of voice to
transmit urgent or important information to another radio. In
times of an emergency, DSC can alert all radios within range
to a distress message even when a listening watch is not
being maintained. This increases the chances of your signal
being heard. DSC can also be used to make All Ships Calls,
Group Calls and Position Requests as well as routine calls to
individual radios. DSC is part of the Global Maritime Distress
and Safety System (GMDSS) which is expected to eventually
replace listening
watches on distress frequencies and will be used to announce
all routine and urgent maritime safety information broadcasts.
DSC AND GPS
DSC operation is enhanced by the in-built GPS receiver
in your GX875. By using GPS, your distress call can
automatically include your current position and time. If a
GPS position cannot be obtained, DSC calls can still be sent
and received to alert the operator of another vessel for
subsequent voice communication.
DSC calls are automatically sent and received on CH70. The
GX875 has two receivers, one of which is dedicated to CH70.
Therefore, regardless of which channel you are operating on,
the GX875 will not miss a DSC call.
USER MMSI (MARINE MOBILE SERVICE
IDENTITY)
A User MMSI is a unique 9-digit number used to identify a
DSC capable radio. An MMSI is used to selectively call other
vessels. Before you can use DSC, you must enter your User
MMSI number into the ‘My MMSI ID’ option in the DSC
Menu. If you don’t yet have a User MMSI, please register
with your local Maritime Authority (AMSA in Australia – go
to http://www.amsa.gov.au/mmsi/ for more details and to
download an application form) who will then issue a unique
MMSI number.
Please refer to the ‘My MMSI ID’ option further below for
instructions on entering your User MMSI.
Figure 9

18 INSTRUCTION MANUAL GX875
DISTRESS CALLS
To make a Distress Call use the button under the cover
on the side of the GX875. To make any other DSC call, use
the key on the main keypad.
Making a Distress Call
1. Lift the bottom end of the cover on the side of the
radio.
2. Briefly press the Distress button. The display shows the
‘Distress’ Menu list (fig 10).
3. Rotate the multi-function knob to select a pre-formatted
distress message. The list includes: Undesignated, Fire,
Explosion, Flooding, Collision, Grounding, Capsizing,
Sinking, Adrift, Abandoning, Piracy and Man Overboard.
You will need to scroll past the bottom of the displayed list
to reveal all of the available options.
4. Press and hold the Distress button. The display will flash
and the radio will beep as it counts down from 3 to 1 (fig
11).
Note: To cancel the distress call, release the Distress button
before the countdown is completed. The radio will return to
normal operation.
When the countdown is complete, the Distress call will be
sent. The radio will then switch to CH16 and the display will
show DISTRESS to indicate it is now in the distress mode
and is waiting for an acknowledgement from another radio
(fig 12). The distress call mode will be cancelled when a
DISTRESS ACKNOWLEDGE is received and the radio will
then return to normal operation.
Figure 10 Figure 11
Distress Menu
Undesignated
Fire Explosion
Flooding
Collision
Grounding
Capsizing
Sinking
Exit Loop
Distress Call
Sinking
Push the key
for 3 seconds!
Figure 12
DSC INT
6W
P
SQL:5
DISTRESS
Resend in 4:09
Sinking
Exit Loop Pause
If an acknowledgement is not received, the distress call will
be re-sent at around 4 minute intervals for as long as the
radio remains in the distress call mode. Select PAUSE to
delay the resending of the distress call or Exit to cancel.
NOTE: A Distress Acknowledge response is generally sent by
a coastal base station.
Receiving a Distress Call
When a Distress Call is received, an audible Distress Alert
alarm will be generated and, if the Auto Channel Change
option in the DSC Setup Menu set to Automatic, the GX875
will switch to CH16.
Note: To view all received DSC messages, see Receive Call
Log under DSC MENU immediately below.
DSC MENU
Apart from distress calls, all other DSC calls are made using
the DSC Menu. To access the DSC menu short press the
key.
DSC Menu
Individual Call
Position Request
All Ship Call
Group Call
Test Call
Recieve Call Log
Send Call Log
Exit Loop Enter
Figure 13
Note: The last few menu items will not be immediately
visible until you scroll past the bottom of the list.

GX875 INSTRUCTION MANUAL 19
MY MMSI ID SETUP
Before using the DSC function you must set up your user DSC
MMSI ID. If you don’t yet have a user DSC MMSI ID, please
register with your local Maritime Authority.
Note: You do not require a user MMSI to receive distress
calls but you will if you want to transmit them.
IMPORTANT: It is a requirement of the regulations that the
User MMSI can only be entered ONCE. For this reason take
special care when entering your user MMSI number to ensure
it is entered correctly before saving it. You will be required to
enter your MMSI twice as confirmation of the correct number
before it is stored by the radio. If you need to change the
MMSI (due to an entry error or after purchasing a second
hand GX875) please contact GME to arrange for the MMSI
code to be reset.
To enter the 9 digit User MMSI number issued to you by your
local authority:
1. Briefly press the key to enter the DSC menu.
2. Rotate the multi-function knob to select My MMSI ID
then press Enter.
3. Rotate the multi-function knob to select the number in
the first digit position then press to advance to the next
digit.
4. Repeat step 3 to enter the full 9 digit MMSI number. Once
you have been entered all 9 digits, press Enter (fig 14).
5. You will be asked to enter the MMSI again. Repeat step 3
to re-enter the MMSI then press Enter to store or press
Exit to cancel without saving.
Figure 14
My MMSI ID
123456789
Position Request
All Ship Call
Group Call
Test Call
Recieve Call L
l Log
Exit Loop Enter
To make an INDIVIDUAL CALL, POSITION REQUEST,
GROUP CALL or TEST CALL
The Individual Call option is used to alert a specific vessel
that you wish to communicate with them on a specified
channel. If the called vessel’s radio is on a different channel,
their radio will change to the channel you specify.
A Position Request (or position polling) is used to obtain
the position of another vessel. If the receiving vessel is in
range, an acknowledgement will be received from them that
will include their position. If there is no acknowledgement,
either the receiving boat is not in your communication area or
it has chosen to ignore your request.
A Group Call is used to contact a group of vessels that
are using the same Group MMSI. All ships in the group who
receive the Group call will change to the specified channel.
For example, this feature could be used to alert all yachts
in a race to announce a change in the race conditions. Any
number with a leading zero can be used as a Group MMSI,
and they do not need to be registered, but the entity deciding
on a Group MMSI must use the MID of the host country or
country of vessel registration (503 in Australia). The Group
ID should be based on a key vessel in the Group, and the
recommended system is to drop the last digit of the key
vessel’s MMSI and place a zero in front.
e.g. A fleet of vessels that has a lead vessel with a DSC self-ID
of 503080110 could use the Group MMSI of 050308011.
This would then be programmed into all fleet vessels as the
special event Group MMSI.
The Test Call option can be used to make a test call to
your local Coast Station. The coast station should provide
an automated response to confirm that your radio’s DSC is
operating correctly.
The operations of the call options described above are all
very similar.
1. Briefly press the key to enter the DSC menu.
2. Rotate the multi-function knob to select Individual Call,
Position Request, Group Call or Test Call then press
Enter.

20 INSTRUCTION MANUAL GX875
3. Input the other radio’s MMSI Manually or select it from
your Phone Book.
a) To manually enter the radio’s MMSI;
i. Select ‘Input Address’ and press Enter (fig 15).
ii. Rotate the multi-function knob to select the number in
the flashing digit position then press to move to the
next digit.
iii. Repeat to enter all 9 digits of the MMSI number then
press Enter.
Input Address
Input 9 digits
123000001
Position Request
All Sh
Test Call
Recieve Call Log
Send Call Log
Exit Loop Enter
Figure 15
b) To recall the radio’s MMSI from the phone book;
i. Select ‘From Phonebook’ and press Enter.
ii. Select Group List if making a Group Call otherwise
select Buddy List and press Enter (fig 16).
iii. Rotate the multi-function knob to select the desired
name from the list then press Enter (fig 17).
Phone Book
Buddy List
Group List
All Ship Call
Group Call
Test Call
Recieve Call Log
Send Call Log
Exit Loop Enter
Buddy List
Bluewave
Seadog
Seaspray
Group Call
Test Call
Recieve Call Log
Send Call Log
Exit Loop Enter
Figure 16 Figure 17
4. Select the call type from Routine, Safety or Urgency
(fig 18).
5. For Individual and Group Calls select a suitable channel
from the list provided then press Enter (fig 19).
Individual Call
Routine
Safety
Urgency
Group Call
Test Call
Send Call Log
Exit Loop Enter
Individual Call
Select Channel:
06 Safety
08 Commercial
09 Calling
10 Commercial
11 vts
12 portops/vtsCall Log
Exit Loop Enter
Figure 18 Figure 19
6. A summary of your selected options are displayed. If
everything is correct press Enter to call or Exit to cancel
(fig 20).
Individual Call
To: 123000001
06 Safety
06 Telephone by
06 Channel 06
06 Commercial
11 vts
12 portops/vts
Exit Loop Enter
Figure 20
All Ships Call
An All Ships Call allows your radio to establish contact with
all the other ships in your area without needing to enter their
MMSI. All Ships calls are classified as ROUTINE, SAFETY or
URGENCY. URGENCY calls (similar to a PAN PAN call) may
be sent when a vessel is not in immediate distress but has a
problem that may lead to a distress situation. SAFETY
calls (similar to SECURITY calls) may be sent when safety
information needs to be transmitted to other vessels.
To send an All Ships Call;
1. Briefly press the key to enter the DSC menu.
2. Rotate the multi-function knob to select All Ship Call and
press Enter (fig 21).
3. Select from Routine, Safety or Urgency and press Enter
(fig 22).
4. Select the required channel (fig 23).
5. A summary of your selected call options is displayed. If
everything is correct press Call to call or Exit to cancel.