Midland NEPTUNE 100 Manual

Produced or imported by:
CTE INTERNATIONAL srl
Via. R.Sevardi 7 - 42010 Mancasale Reggio Emilia - Italy
Imported by:
ALAN UK
Unit 2, Callenders, Paddington Drive, Churchward Park,
Swindon, Wiltshire, SN5 7YW - United Kingdom
This radio can only be used with a valid ship’s radio
station licence, issued by the national authorities in
the home country of the ship. Read the instructions
carefully before installation and use.
” INSTRUCTION GUIDE
Midland | Marine Radio Linewww.midlandradio.eu |
Neptune 100

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INDEX
1. ABOVE ALL... SAFETY! .......................................................................................................... 3
1.1 Symbols used .................................................................................................................. 3
1.2 Warnings.......................................................................................................................... 3
1.2.a General............................................................................................................................ 3
1.2.b Radiofrequency/installation ............................................................................................. 3
1.2.c Automatic Transmitter Identication System (ATIS) ....................................................... 3
1.2.d Environmental.................................................................................................................. 4
1.3 ETSI Information.............................................................................................................. 4
1.4 Assistance ....................................................................................................................... 4
1.5 Manual Notes .................................................................................................................. 4
2. INTRODUCTION....................................................................................................................... 5
2.1 Generalities ..................................................................................................................... 5
3. DESCRIPTION OF CONTROLS AND CONNECTORS............................................................ 6
3.1 Front panel ...................................................................................................................... 6
3.2 Back panel (connections) ................................................................................................ 7
3.3 Microphone...................................................................................................................... 7
4. INSTALLATION......................................................................................................................... 8
4.1 Contents of package........................................................................................................ 8
4.2 Location for the transceiver ............................................................................................. 9
4.3 Mounting of transceiver ................................................................................................... 9
4.4 Adjustment of angle....................................................................................................... 10
4.5 Installation of the antenna/electromagnetic exposure ................................................... 10
4.6 Mounting of Microphone ................................................................................................ 10
4.7 Connections....................................................................................................................11
4.7.a Power Supply .................................................................................................................11
4.7.b GPS device.....................................................................................................................11
4.7.c Antenna ..........................................................................................................................11
5. BASIC OPERATION ............................................................................................................... 12
5.1 Turning NEPTUNE 100 on/off ....................................................................................... 12
5.2 Volume adjustment ........................................................................................................ 12
5.3 Squelch Regulation ....................................................................................................... 12
5.4 Selecting an operating channel ..................................................................................... 12
5.5 Transmission and reception........................................................................................... 12
5.6 Selecting high and low transmission power................................................................... 13
5.7 Instant recall of channel 16............................................................................................ 13
5.8 Display/keypad lighting.................................................................................................. 13
6. SCANNING FUNCTIONS ....................................................................................................... 14
6.1 Channel scanning.......................................................................................................... 14
6.2 Dual Watch and Triple Watch ........................................................................................ 14
6.3 MEM function................................................................................................................. 15
7. USE WITH GPS ...................................................................................................................... 16
7.1 Function......................................................................................................................... 16
7.2 GPS information on the display ..................................................................................... 16

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8. DIGITAL SELECTIVE CALLING (DSC) ................................................................................. 17
8.1 Introduction.................................................................................................................... 17
8.2 Mobile Marine Identication Service (MMSI) ................................................................. 17
8.3 Navigating the DSC menu ............................................................................................. 17
8.4 Individual call (ROUTINE TO)........................................................................................ 17
8.5 Group calling (Group Call)............................................................................................. 18
8.6 General call to all ships (ALL SHIP SAFETY – ALL SHIP URGENCY) ........................ 18
8.6.a Sending a call to all ships .............................................................................................. 18
8.7. DSC DISTRESS call ........................................................................................................ 19
8.7.a Sending a DISTRESS call.............................................................................................. 19
8.8 Position request................................................................................................................. 19
8.9 Stand By option ................................................................................................................. 20
9. RECEIVING A DSC CALL ...................................................................................................... 20
9.1 Receiving a distress call.................................................................................................... 20
9.2 Individual call..................................................................................................................... 20
10. CUSTOMIZATION.................................................................................................................. 21
10.1 Log (list of registered calls)............................................................................................ 21
10.2 Dir” (Entries in the directory) ......................................................................................... 21
10.3 GPS ............................................................................................................................... 22
10.4 GPS select..................................................................................................................... 22
10.5 “Beep” (Enable/disable keypad beep) ........................................................................... 22
10.6 Display/keypad backlight ............................................................................................... 23
10.7 Band edit ....................................................................................................................... 23
10.8 LCD contrast.................................................................................................................. 23
10.9 MMSI (Setting of personel MMSI code and MMSI group code) .................................... 23
10.10 “ATIS” (Setting of ATIS code and activation –deactivation of
automatical transmission).............................................................................................. 24
11. PROGRAMMING AND SELECTION OF PRIVATE CHANNELS ......................................... 25
12. MAINTENANCE.................................................................................................................... 25
12.1 Maintenance and warnings ............................................................................................ 25
13. TROUBLESHOOTING.......................................................................................................... 26
14. TECHNICAL SPECIFICATIONS:.......................................................................................... 27
14.1 Transmitter..................................................................................................................... 27
14.2 Receiver ........................................................................................................................ 27
15. FREQUENCY TABLE ........................................................................................................... 28

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1. ABOVE ALL... SAFETY!
1.1 Symbols used
For ease and convenience of viewing, NEPTUNE 100 uses symbols to highlight urgent situations,
practical advice, and general information.
Warnings such as this, shown using an open hand symbol, indicate a crucial description
regarding technical repairs, dangerous conditions, safety warnings, advice and/or
important information. Ignoring these symbols may result in serious problems and/or
damage and/or personal injury.
Notes such as this one indicate practical advice that we suggest be followed for optimal

performance with NEPTUNE 100.
1.2 Warnings
1.2.a General
This device has been tested for compliance with Class D digital marine device limits. These
limits were created to allow for reasonable protection against damaging interference.
This device is to be used solely as an aid to navigation. Its settings may be inuenced by 
diverse factors, such as defects or malfunction of the device, environmental conditions
or improper use.
It is the user’s responsibility to observe reasonable prudence and judgement in
navigation, and as such this device should not be considered a substitute for this
reasonable prudence and judgement.
Do not open the radio for any reason! NEPTUNE 100’s precision mechanics and electronics
require expertise and specialized equipment; for the same reason, the radio should
under no circumstances be realigned as it has already been calibrated for maximum
performance. Unauthorized opening of the transceiver will nullify the warranty.
1.2.b Radiofrequency/installation
Midland recommends following the requirements for prevention of radiofrequency
exposure. Unauthorized changes or modications to this device may invalidate
conformity to the ETSI Regulations.
This VHF DSC transceiver generates and irradiates electromagnetic energy (EME) at
radiofrequency (RF), and as such must be installed and placed in operating conditions
that are in conformity with the instructions contained in this manual and with current
regulations. Not following these instructions can cause personal injury and/or malfunction
of the device.
Do not use NEPTUNE 100 before connecting a suitable antenna that is in perfect working
condition – although NEPTUNE 100 is protected, this may seriously damage the stages
of transmission power.
Do not use transmit before ensuring proper connection of the antenna. During
transmission, remain at a minimum distance of 1mt from the antenna.
1.2.c Automatic Transmitter Identication System (ATIS)
Your marine transceiver may activate, if necessary, the ATIS function. The ATIS function
may be activated when using the transceiver within the internal navigable waters of
Europe which require the automatic transmission of identication. For further details,
please contact your local authorities.

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1.2.d Environmental
Pay attention to ambient conditions – although NEPTUNE 100 is designed to operate
under the most severe conditions, it is important to avoid exposure to environments that
are excessively humid or dusty, or to temperatures outside the –15 to +55°C range. Also
avoid exposure to direct sunlight.
Avoid jarring and excessive vibration – NEPTUNE 100 is built to resist mechanical shock
and vibration as long as these are within the norm for any electrical device.
Do not use this device in potentially explosive environments. A single spark may cause
an explosion.
1.3 ETSI Information
ETSI (European Telecommunications Standards Institute) has established specic requirements
(EN 301 025-2/3) for marine transceivers with DSC function class ”D”. For use on non-SOLAS
vessels.
1.4 Assistance
We urge you to write the serial number of your transceiver in the space provided below. This
number is found on the back panel of the transceiver and will be useful in the event of repair/
assistance and/or loss and/or theft..
Serial number ________________________________
1.5 Manual Notes
Writing of this manual has been completed with the intention of supplying information that are
comprehensive, precise and up-to-date. Nevertheless, the manufacturer does not assume
responsibility for the actual correspondence with the product and for the consequences of possible
errors caused by factors over which it has no control. Equipment and options described may differ
according to varying countries.
E. and O.E.
All rights reserved.

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2. INTRODUCTION
2.1 Generalities
Congratulations for choosing Midland’s marine transceiver NEPTUNE 100. This product is a high
performance, mobile VHF DSC marine transceiver. The following are its principle features:
Equipped with all international channels•available (correctly assigned).
High transmission power of 25W•, which allows the user to maintain contact from large
distances, and a low transmission power of 1 W to reduce consumption during short-distance
communication.
Principal commands duplicated on the microphone•for faster accessibility – channel
selection and channel 16 recall.
Back lit LCD display and adjustable contrast•– constantly shows NEPTUNE 100’s parameters
and settings and occurs an optimal visualization.
Possibility to program 20 private channels•by means of the optional programming kit “PRG
NEPTUNE 100”. We remind that the use of private channels is controlled by the national
competent authorities: for this reason, we suggest you contact the local radio communication
authorities.
Extraordinary capability for water resistance•, conforms to the standard IPX7.
Recall button for Channel 16•– for instant access to channel 16 (the universal marine channel
for emergency contact).
NMEA•connection – use the interface cable supplied for easy connection from transceiver to
optional GPS system, such as GR213 or other compatible GPS. Once connected, the display
will show the automatically updated coordinates (latitude and longitude) and time data.
DSC Digital Selective Calling•– for security on the water and the ability to make quick
calls automatically (the transceiver supports DSC (Digital Selective Calling) operations with
a specically designed DSC unit which conforms to the ITU-R standard, M493-11 Class D
requirement).
MMSI directory•, which simplies the sending of DSC calls to frequently called contacts and
allows viewing of contact name on the display.
Mounting on adjustable bracket•for stable and comfortable positioning in any condition.
Connection to an external speaker•(optional) – for listening to communications further away
from the transceiver.
The manufacturers, in their effort to constantly improve product quality, reserve the right to

change the above characteristics without forewarning. For eventual updates, visit www.cte.it
or contact your authorized dealer.

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3. DESCRIPTION OF CONTROLS AND CONNECTORS
3.1 Front panel
1. PWR/VOL - Turns NEPTUNE 100 on/off and regulates audio volume reception.
2. SQUELCH knob – Regulates the squelch level (noise silencer in absence of signals).
3. Button 16 – Pressing the 16 button provides quick access to channel 16.
4. Hi/LOW – To select the high or low transmission power
5. DW button – This button activates the Dual Watch function, able to monitor two channels of
your choice.
6. DISTRESS button – The button below a soft cover sends a DISTRESS call for help. The
signal also includes your MMSI identication code and the nature of the distress. If a GPS
is connected to the device, data regarding position and time are also included in the call.
The Distress function, or any other DSC transmission function, is not operative until a MMSI

user code has been inserted
7. MENU/SELECT – To enter the menu of the radio and conrm the selected settings.
8. T/W button – Activates the Triple Watch function, able to monitor 3 different channels.
9. STEP/SCAN button – To select two different types of scanning.
10. MEM button – Allows to store the selected channel and insert it in the memory group.
11. UP/DOWN controls ∧/∨– They are useful to look through the menu and to select the
channels.
12 Internal speaker - Guarantees clear listening of communications.
1
2
3 4
5
6
8
7
9
10
11
12
DISTRESS
NEPTUNE 100
MEM
STEP
SCAN
MENU
SELEST
T/W
DWHi/LOW16
SQUELCH
OFF
PWR/VOL

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3.2 Back panel (connections)
Warning! Faulty connections or short-circuits may seriously damage NEPTUNE 100.
Before attempting any connections, consult the specialized sections of this manual.
1. Antenna socket
This SO 239 socket is for connecting an appropriate antenna.
2. Power cable
This red/black cable has to be connected to a power source of 12 Vdc (red is positive).
3. Socket for additional external loudspeaker
You can use this jack for the connection to a suitable external loudspeaker (optional), if
needed.
4. GPS connector
Allows for connection to the optional receiver module “GR213” cod. C833 (or other compatible
receiver), for obtaining, viewing and transmitting (with DSC) information regarding position and
current time data.
3.3 Microphone
1 UP and DOWN buttons: These two buttons change the
tuning channel. The rst scrolls upwards through the
tuned marine channels, the second scrolls downwards.
2 Button 16: For ease of use, button 16 performs the
same function as the button 16 on the front panel of the
transceiver.
3MENU: activates the same functions/features of the
MENU button on the front panel of the radio.
4 PTT (push to talk): Pressing this button will begin
transmission
5 Microphone: During transmission, speak a few
centimetres from the microphone.
ANT DC 13,8V
1
2
4
3
MENU
16
1
3
4
2
5

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4. INSTALLATION
4.1 Contents of package
Before using your transceiver, ensure that your package is complete and contains:
Mounting bracket1.
DC power cord with integrated protecting fuse2.
Knobs (2 pieces)3.
Mounting piece for microphone4.
Self-threading screws for mounting bracket (4 pieces)5.
Screws for mounting bracket (4 pieces)6.
Washers (4 +4 pieces)7.
Nuts (4 pieces)8.
Self-threading screws for microphone mount (2 pieces)9.
Screws for the microphone mount (2 pieces)10.
Washers (2 +2 pieces)11.
Nuts (2 pieces)12.
Grained washers (2 pieces)13.
Nuts (2 pieces)14.
Flush mounting kit15.
Cable for GPS receiver16.
Certicate of warranty and instruction manual (not shown)17.
Depending on the model, some parts may already be attached/connected to the device. In any

case, if any parts are missing, immediately contact your supplier.
15

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4.2 Location for the transceiver
Before continuing, look for a place to install the transceiver which:
Is far enough away from any device sensitive to magnetic/electromagnetic elds•
(e.g. compass) in order to avoid interference during their use.
Allows for accessibility to the front panel of•NEPTUNE 100.
Provides easy connection to a power supply, for the antenna and for other cables.•
Has sufcient space close by for installation of the microphone support.•
Allows for mounting of the antenna at least 1 meter from the transceiver.•
The universal mounting bracket supplied allows for mounting of the transceiver high up (with2
the bracket above the device) or on the bridge (with the bracket below the device) with an
angle range of 45°.
Warning! Installation and connections must be performed in part by qualied persons.
4.3 Mounting of transceiver
To mount the transceiver to your vessel (see following picture):
Choose an appropriate location, as explained in the paragraph above.1.
Position the mounting bracket on the surface upon which it will be xed, use a pencil to draw the2.
position of the four holes where the screws will be inserted.
Ensure that the surface intended for the transceiver mounting can be drilled into without
provoking damage to other parts of the vessel and be careful to not drill right through
it.
Remove the bracket, drill four holes smaller in diameter than the screws, and reposition the3.
mounting bracket, aligning it with the four holes.
Screw in the mounting screws and ensure the bracket is xed rmly, using the screws, the4.
grained washers, the at washers and the nuts supplied.
If you are not able to reach the back part of the bracket surface to x the nuts onto the 
screws, use threaded screws to x the bracket.
Tighten the screws with a screwdriver so that the bracket is rmly xed to the surface.5.
Align the transceiver on the bracket, ensuring the holes of the internal part of the bracket line up6.

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with those on both sides of the transceiver (you can choose the preferred notch in order to best
adjust the angle of the transceiver’s front panel for ease of viewing and use (150of variation for
each notch).
Mount the mounting knobs on the two sides of the bracket to soundly x the transceiver.7.
Keep the transceiver and microphone at a distance of at least 1 meter from all other
magnetic devices (e.g. compass) on your vessel.
4.4 Adjustment of angle
To change the angle of inclination after installation:
Loosen the mounting knobs on the sides of the bracket.1.
Adjust the transceiver to a better angle, lining up the holes of the internal part of the bracket with2.
those on both sides of the transceiver.
Tighten the knobs to x the transceiver into place.3.
4.5 Installation of the antenna/electromagnetic exposure
For optimal radio settings and minimal user exposure to electromagnetic radiofrequency energy,
ensure that:
The antenna is connected to the transceiver and is properly installed.•
The antenna is situated away from people and is positioned at least one meter from the•
transceiver and microphone.
The connector is a standard PL259 (male UHF).•
4.6 Mounting of Microphone
To mount the microphone mount, look rst for a mounting
point close to the transceiver. The distance between the
transceiver and the wall mount must be less than the length
of the microphone cable.
Do not pull excessively on the microphone cord.
This part is important to the correct function of the
device: over time, pulling may damage the cord and
impede the user from transmitting.
MENU
16

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4.7 Connections
Refer to the following diagram:
4.7.a Power Supply
The transceiver power supply must be 12Vdc. The red cable must be connected to the positive pin,
the black to the negative pin.
Warning! A faulty connection may seriously damage the radio!!
The power cable is equipped with a protection fuse. If the fuse shorts, look for its reason
before substituting the cable with a new one of the same type and value. Never short-
circuit it, as this may damage the radio. We suggest using the supplied cable.
4.7.b GPS device
If your NEPTUNE 100 transceiver is connected to a GPS receiver, such as the GR213, you can
obtain and view NMEA information relative to the current position the vessel (latitude and longitude)
and the local time with respect to Greenwich Mean Time (GMT).
4.7.c Antenna
The antenna is an extremely important part of the device and noticeably inuences the settings of
any telecommunications device. Contact your supplier regarding the antenna and request advice
about how to mount and best connect it to your transceiver.
Warning! Ensure the antenna is in perfect working order. It may otherwise seriously
damage the radio! A periodical measurement of the stationary waves is advised using a
suitable SWR metre.
Fuse
Red Black
Passage to
bronze seal
Antenna
Power supply
External speaker
GPS receiver

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5. BASIC OPERATION
5.1 Turning NEPTUNE 100 on/off
To turn the transceiver on, rotate the PWR/VOL knob clockwise until it clicks on. You will hear a
beep (acoustic signal) and the LCD display will show the channel in use.
Important: when you turn on the radio for the very rst time, the display will show channel 16; while
usually, NEPTUNE 100 stores the last channel in use before it’s switched off.
To turn the transceiver off, rotate the knob counter-clockwise until you hear a click.
5.2 Volume adjustment
Bring the OFF/VOLUME knob rst to medium volume. Once the transceiver picks up a signal,
adjust the volume to a comfortable level. If no signal is picked up, use the squelch control as
described in the following paragraph and regulate the volume using the background noise.
5.3 Squelch Regulation
Squelch is used to eliminate the annoying background noise you hear when no signal is being
picked up. If the squelch is adjusted correctly, there should be silence in between calls as well as
a reduction in battery consumption. To regulate the squelch:
Rotate the1. SQUELCH knob completely counter-clockwise until you hear the background
noise (if you don’t hear anything, increase the volume); RX will appear on the display.
If no signal is being received (only noise), slowly rotate the2. SQUELCH knob clockwise,
stopping as soon as the noise and RX disappear stably.
If you regulate the squelch level too high (closed), you may hear only background noise or

intermittent discharges.
5.4 Selecting an operating channel
Press repeatedly the UP or DOWN buttons on the keypad or on the microphone to scroll through
the marine channels until nding the desired channel.
Channel 16 is dedicated to the emergencies, therefore we recommend not to use it for general
communications!
Channel 70 is dedicated to DSC communications.
5.5 Transmission and reception
Transmitting without a perfectly functioning antenna may seriously damage the
transceiver.
The PTT (Push-To-Talk) button is located on the external microphone of your NEPTUNE 100. To
transmit:
Ensure that no one else is speaking.1.
Hold down the2. PTT button on the microphone. TX will appear on the Display. Wait for a
second, then speak in a normal voice about 5 cm from the microphone.
When you have nished, release the 3. PTT button: TX will disappear from the display. Now
NEPTUNE 100 is in receiving mode (silent and waiting for a signal) and will automatically
receive any communication.

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5.6 Selecting high and low transmission power
The transmission phase absorbs the most energy. To reduce the risk of wearing out the battery, we
recommend selecting low transmission power when transmitting over short distances.
Hold the H/L button down (on the radio): Lo (low power) appears on the display. When transmitting
or receiving over long distances or with weak signals, press the H/L button again. Lo will be replaced
with Hi (high power) on the display.
When the transceiver is tuned to a channel limited to low output power, pressing the
 H/L
button has no effect.
5.7 Instant recall of channel 16
Channel 16 is a security and distress channel. This channel is used for emergency
communications.
Press the 16 button (the red one on the keypad) and you will be tuned on the emergency channel.
To return to the channel previously used, simply press the 16 button again.
Do not transmit on channel 16 unless absolutely necessary. Doing so may impede
emergency operations.
5.8 Display/keypad backlight
The display/keypad backlight can be adjusted according to your needs or to the environmental
conditions.
To select the desired level of backlight:
keep pressed•MENU/SELECT until DSC CALL appears on the display;
using the•UP/DOWN buttons select SYSTEM and conrm pushing MENU/SELECT;
select•BACKLIGHT and conrm by pushing MENU/SELECT;
select the desired backlight level, from 0 to 3.•
To return to the radio modality, push PTT, select EXIT in every menu, or wait for 1 second and the
radio will automatically exit .

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6. SCANNING FUNCTIONS
6.1 Channel scanning
NEPTUNE 100 can automatically search for signals throughout the marine band by scanning,
or selecting the channels in rapid sequence. When a signal is detected, the scanning pauses
on that channel (RX displayed) and remains blocked until the signal ends. Before the scanning
automatically starts again, NEPTUNE 100 waits for a 3,4 seconds in case the user wants to
transmit.
You can transmit in any moment, even if the scanning is active. In this case, the transmission will
be done on the channel currently scanned; but if you transmit just after a signal is detected, the
radio will transmit on that channel.
After the transmission, the scanning is interrupted.
If the scanning detects an undesired channel, you can start scanning again by pushing STEP/
SCAN.
To activate the Scan function:
Hold down the STEP/SCAN button till scan blinks on the display; press MENU/SELECT to conrm
your selection. The scanning will start.
The scanning and the memory scanning cannot properly work if the squelch is not adjusted as
previously described.
To activate the Mem Scan function:
•keep pressed STEP/SCAN till scan blinks on the display;
•with the UP/DOWN keys select mem scan;
•conrm your selection by pushing MENU/SELECT.
Now the scanning of the stored channels starts.
To stop it, push STEP/SCAN and the radio will stop on the channel scanned in that moment.
• Reception: if NEPTUNE 100 detects a signal, the scanning interrupts and the display
indicates “RX”.
• Transmission: you can transmit in any moment, even if the scanning is active. In this case,
NEPTUNE 100 will transmit from the channel being scanned in that moment; but if the
transmission is done after a channel is picked up, the device will transmit from that channel
within 3 / 4 seconds. After the transmission, the scanning interrupts.
6.2 Dual Watch and Triple Watch
Dual Watch
Allows you to monitor two channels at the same time: the channel in use and channel 16 (emergency
channel).
To activate this function, push DW and the radio will start monitoring both channels.
To disable this function push DW again and the radio will return to the channel in use.
If you push PTT the scanning will stop and the radio will go to channel 16.
The Dual Watch and Triple Watch stop when a signal is picked up, giving you the possibility to
answer.
These functions cannot operate properly if the squelch is not adjusted.

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Triple Watch
This function allows the monitoring of three channels at the same time: channel 16, channel in use
and one channel of your choice.
Procedure:
Press•T/W, until “TRIPLE WATCH” blinks on the display;
Select the secondo channel you want to monitor; CH16 is automatically monitored;•
Conrm by pushing • T/W again; the scanning of the 3 channels will begin.
To stop it, press T/W and the radio will automatically return to the second channel selected.
If you push PTT the scanning will stop and the radio will go to channel 16.
The Dual Watch and Triple Watch stop when a signal is picked up, giving you the possibility to
answer.
These functions cannot operate properly if the squelch is not adjusted.
6.3 MEM function
This function allows you to store some channels to scan through the Mem Scan function.
To store a channel, follow these steps:
Select the channel to store: keep pressed the•MEM button till the display shows mem.
Repeat the same procedure to store other channels.•
To delete a pre-selected channel in memory:
Select it and keep pressed•MEM button till mem disappears from the display.
The other stored channels can be easily monitored through the MEM SCAN function.
The MEM SCAN function cannot properly work if the squelch is not correctly adjusted.


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7. USE WITH GPS
7.1 Function
If connected to a GPS receiver (GR213), the transceiver will display the vessel position (latitude
and longitude), as well as time data.
If the information regarding position data are not received in the normal radio mode and the time
data does not appear within 4 hours, a 30-second-long warning tone will sound (can be deactivated
by pressing any button). The display will show “POSITION IS OVER 4 HOURS OLD”.
You may also insert the coordinates manually.
7.2 GPS information on the display
Once connected the GPS (GR213) to your NEPTUNE 100 (PS 2 connector), the symbol [DISEGNO]
will blink on the display till your position will be established. Then, the radio display will show the
GPS coordinates and the time data.

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8. DIGITAL SELECTIVE CALLING (DSC)
8.1 Introduction
Digital Selective Calling is a semiautomatic method for controlling VHF, MF and HF radio calls. It
was also designed as part of the global marine security and emergency response system
(GMDSS). It is likely that DSC will eventually replace audio calls on emergency frequencies and
will be used to send urgent and routine radio-transmitted maritime security information. This new
service will allow crafts to send/receive calls of an emergency, urgent, security, or routine nature to/
from vessels equipped with a DSC transceiver.
To avoid accidentally sending a distress call or a call sent incorrectly, contact your
vendor or local authorities for updates on DSC operating and emergency procedures.
8.2MobileMarineIdenticationService(MMSI)
Important! To send/receive DSC calls, the user must program his personal MMSI code into
the transceiver. This is a nine-digit number used by marine transceivers equipped for DSC
digital selective calling. This number is used much like a telephone number for contacting
other, specic vessels.
DSC transmissions can be done only if you have been assigned the individual MMSI
code and you entered it in your radio (otherwise the DISTRESS/DSC controls will be
disabled).
Sending a distress call without founded reason is a criminal offence. Never use this
function unless you nd yourself in a situation that merits asking for help.
8.3 Navigating the DSC menu
NEPTUNE 100 offers many DSC functions. For this reason it was created
Once inside a sub-menu, you can return at any time to the main menu by pressing the
PTT button or long pressures of MENU/SELECT button.
To return to the radio mode, conrm EXIT in every menu.
8.4 Individual call (ROUTINE TO)
The user can carry out an individual call to a specic DSC station (a vessel or a costal station).
To carry out calls, you have to enter the MMSI code manually or recall it from the preprogramed
MMSI directory.
• Keep pressed MENU/SELECT till DSC CALL is displayed;
• Conrm your selection by pushing MENU/SELECT; the display will show INDIVIDUAL. Push
MENU/SELECT again for conrmation;
Now you can choose whether inserting the MMSI code manually or recall it from the directory
previously set
• Scroll with the UP/DOWN keys the 9 digits composing the code;
• Conrm by pushing MENU/SELECT;
• With the UP/DOWN keys select one of the 23 channels available (simplex) and conrm your
selection with MENU/SELECT.

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The transmission is sent and WAITING ACK will blink on the display; if your call is conrmed by
the other party, the display shows his name and you will hear a beep. If you push MENU/SELECT
the display indicates the channel previously selected and the beep will stop; instead if you push any
other channel, you will exit the individual call.
8.5 Group calling (Group Call)
This function allows the user to call a specic group of stations which have the same MMSI group
code stored in their transceivers and which signals the audio channel the user wishes to speak on.
Therefore you can only carry out the group call when you have programmed the addresses in a
directory.
Keep pressed• MENU/SELECT till DSC CALL is displayed;
Conrm by pushing • MENU/SELECT; INDIVIDUAL will appear on the display;
Scroll through the channels with the• UP/DOWN keys;
Select GROUP and conrm the selection with the • MENU/SELECT button;
You will be asked the code previously set; after this selection, conrm by pushing • MENU/
SELECT;
Select one of the 23 channels available, send the call and press• MENU/SELECT as
conrmation.
8.6 General call to all ships
(ALL SHIP SAFETY – ALL SHIP URGENCY)
8.6.a Sending a call to all ships
Keep pressed• MENU/SELECT till DSC CALL is displayed;
Conrm by pushing • MENU/SELECT;
Scroll through the channels with the• UP/DOWN keys;
Select• ALL SHIP and push MENU/SELECT as conrmation;
Select• ALL SHIP SAFETY with the UP/DOWN keys and push MENU/SELECT;
Select the desired channel and send the call by pushing• MENU/SELECT;
To send an ALL SHIP URGENCY call, repeat the above described procedure except the channel•
selection which is not required (the DSC is automatically sent to channel 16).
Sending a distress call without founded reason is a criminal offence. Never use this
function unless you nd yourself in a situation that merits requiring help.

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8.7 DSC DISTRESS call
8.7.a Sending a DISTRESS call
IMPORTANT! You can only send a DSC call if you have been assigned an individual MMSI

code and this code has been programmed into the transceiver (otherwise the following
commands will be deactivated).
Sending a distress call without founded reason is a criminal offence. Never use this
function unless you nd yourself in a situation that merits requiring help.
The DISTRESS button is protected by a small plastic shutter.
This button activates preset emergency messages which are transmitted on a dedicated channel,
channel 70. These messages are sent to all the radios operating within your range and may be sent
also to a busy channel.
To activate a Distress call: raise the shutter, press DISTRESS and choose, with the UP/DOWN
keys, the desired message amongst these:
A. UNDEFINED
B. ABANDONING
C. PIRACY
D. M.O.B. (man over board)
E. FIRE
F. FLOODING
G. COLLISION
H. GROUNDING
I. LISTING
L. SINKING
M. ADRIFT
Hold down DISTRESS for 5 seconds as conrmation.
An acoustic alert sign will emit and the distress call will be carried out.
If the distress call is received and conrmed by another station, the alert sign will stop and the display
will return to normal use in VHF model on channel 16, sending on high transmission power.
If no confrimation is received, the unit will send again the di stress call at intermission of 4 minutes
(even with channel 70 in use) until a conrmation is received or the user manually cancels the call
through MENU/SELECT or 16(distress cancell) buttons or PTT(uscita).
8.8 Position Request
It is possible to send a DSC call to requie the position of a DSC station (it may be preset in the
directory or manually inserted).
•Hold down the MENU/SELECT key till the display indicates DSC CALL
•Press MENU/SELECT as conrmation
•Scroll through the channels with the UP/DOWN keys
•Select POS REQUEST and conrm by pushing MENU/SELECT
•You will be asked a MMSI code, which may be manually inserted or found in the directory
•Select MANUAL INPUT or DIRECTORY with the UP/DOWN keys
•Insert the code with the UP/DOWN keys (in case of manual selection) and press MENU/SELECT
as conrmation
The request will be sent to the selected DSC station and the display will show WAITING ACK.