Marine Rescue Technologies sMRT Crewguard CG-121 User manual
sMRT Crewguard User Manual
sMRT Crewguard User Manual Version 1.1_20200422 April 2020 En
Manufacturer and
distributor of global leading
Man Overboard Solutions from
Table of Contents
sMRT Crewguard User Manual v1.1
MRT Ltd. © 2014
2
1 Declaration of Conformity 3
2 Technical Data 4
3 sMRT Crewguard Overview 5
4 Mounting the Display 5
5 Testing the System 6
6 Display Key Functions 6
7 Lone Worker System 8
8 Warranty Information 11
sMRT Crewguard User Manual v1.1
MRT Ltd. © 2014
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1 •Declaration of Conformity
Declares that products: sMRT Crewguard CG-121 MkII
Conforms to the EMC Directive 2004/108/EC and the R&TTE Directive
1999/5/EC as attested by conformity with the following harmonized
standards with the following harmonized standards:
ETSI EN 301 489-I VI.I.I (2002-08)
Low Voltage Directive 73/23/EEC as attested by conformity with the
following harmonized standard:
EN60950-1:2001
Information technology equipment — Safety —
part 1: General requirements.
Name of Manufacturer/Eu importer Marine Rescue Technologies Ltd.
Marshall House, Zarya Court, Grovehill Road,
Beverley, HU17 0JG
United Kingdom
www.mrtsos.com
Signed:
Name:
Position:
Place:
:
Date
Ken Gaunt
CEO
Beverley
Feb 2014
sMRT Crewguard User Manual v1.1
MRT Ltd. © 2014
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2 •Technical Data - sMRT Crewguard CG-121
•ControlBoxDimensions170x120x60mmAluminiumBox(excluding
antenna&connectors)
•Weight1400gms
•MountingOptionsSurface200mmx130mm(Opt1)
•Bracket198mmlongx60mmwide(Opt2)weight450gms
•Temperaturerange-20°C+60°C
•WaterproofingIP68
•Sensitivity0.5uVatantennainput
•Frequencies121.5MHz,121.65MHz(Test1),121.775(Test2)
•CriteriaofELT/PLBrecognitionAudibleAM-modulatedhowling,downward
LF-rangewithin300Hz…1600Hz
LF-range700Hzminimum
Timeofrepetition:250ms.500ms•DELTAlf/25MS:
-10Hz…-250Hz
•Audioexitmax.8Vss(speaker>8Ohm)
•RelaycontactFloating,carryingcapacitymax.0.5A/10W
•CurrentDrainStandby=80mA/
Ifalarm+ext.speaker(8Ohm)=400mA
•OperatingVoltage12VDC(+-20%)•Airband
•
FixedAntenna(optional)Type:Fixed,FreqRange120/300MHz.Impedence
Impedence: 50 Ω Gain:3.4dBi (120MHz), 5.5dBi
(300MHz).VSWR:<1.5.RatedWindVelocity:
60m/sec.Length:1.7m.MaxDia:Approx34cm.
Weight:1kg.Type:5/8wave(120MHz)2x5/8
wave(800MHz).Connector:M(M-J)
•
HighgainWhipAntenna(optional)Type:Dipole½withloadedradial.Freq
Range:118-137MHz. Impedence: 50 Ω
Radiation(HPlane):360°Omnidirectional.Gain:
2.15dbi.MaxPower:50Watts.FeedSystem:direct
/Centre.CableLength/Type:5m,RG58C/U.
Connector:FME-female.Length:760mm.Weight:
330gr.RadialLength:165mm.Mounting
Hole:14mm.
LMountingBracket:98mmx63mm
sMRT Crewguard User Manual v1.1
MRT Ltd. © 2014
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3 •Overview
The Crewguard is a simple low cost monitor/alarm unit which
continuously monitors its local area for an SOS signal from a Sea
Marshall beacon. It will raise the alarm within a few seconds of receiving
an SOS signal by automatically sounding an external alarm and flashing
all the LEDs on its display.
4.1 The Bridge Box can be flush mounted by cutting a hole in the mounting
surface. The unit can then be mounted using the four M4 nuts and bolts
provided or used with the supplied trunnion mount adjustable bracket.
4.2 In either case the display should be mounted on a smooth and stable
surface. The back of this unit has to be accessible for power supply
connectors. Ensure that there are no other vulnerable elements within the
mounting surface (e.g. electric cables, gas pipes or water pipes).
4.3 When installing ensure you leave space for the supplied antenna or if
using an external antenna, the cable connection.
An externally mounted Hi-gain antenna or whip antenna can also be fitted
(sold separately) to increase detection range.
External antenna with mounting brackets. Comes with 5m cable and plugs,
fitting, mounting bracke. Significantly increases monitoring area of MOB
system and provides coverage in radio blind spots.
4 •Mounting of the Crewguard box
PRODUCT NAME – CREWGUARD CG-121 MKII man overboard monitor alarm
sMRT Crewguard User Manual v1.1
MRT Ltd. © 2014
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5 •Testing the system
STEP 1 Ensure the system has been correctly installed.
STEP 2 Switch the Crewguard control box on, by pressing POWER and
then press TONE DETECT.
STEP 3 Make sure the PLB is switched off (side switch in up position) then
press and hold the round activation button, your PLB will transmit a
low powered signal on the live distress frequency of 121.5MHz to a
range of approx 30m to 50m.
STEP 4 When the Crewguard alarms the LEDs will flash ON and OFF and
the siren will sound.
STEP 5 Repeat the test at different points around your vessel and away
from your vessel until you and your crew are satisfied how the
system operates
6 •Crewguard Control panel functions
sMRT Crewguard User Manual v1.1
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6.1 POWER – Turns unit on and off.
6.2 TONE DETECT – Enable/disable
In this mode the Crewguard only identifies and responds to a signal from a
Sea Marshall® SOS Alerting Unit (PLB). When an SOS signal is received the
unit activates both its internal and external alarm or other external devices
connected to the unit.
63 FREQUENCY - Set to 121.5MHz when the power ON/OFF button and
or reset button is pressed.
6.4 TEST - Select test frequency as required (121.65 or 121.775MHz).
NOTE: the unit will automatically default back to 121.5MHz after 20 minutes.
(Your unit if required may be programmed to default to 121.65MHz).
6.5 RESET – Press this button to cancel the external alarm and reset the unit
6.6 VOLUME – HIGH / LOW – NOTE these buttons can be used to control
the brightness of the display LEDS. To do this press and release the
POWER button so that all LEDs are lit. Use the VOLUME buttons to adjust
the LED brightness.
6.7 RRSI – Received signal indicator. (Red LED in middle of SOS logo)
6.8 RSSI – Received Signal Strength Indicator – 4 Green LEDs
6.9 Plug wiring
If for any reason you are unable to affect your rescue contact the Coast Guard and tell
them you have a man in the water wearing a 121.5MHz PLB.
Black 1 Relay Contacts
Black 2 0V DC Negative
Black 3 2V DC Positive
Green / Yellow Relay Contacts
sMRT Crewguard User Manual v1.1
MRT Ltd. © 2014
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7 •Overview
The Sea Marshall® Crewguard lone worker monitoring system provides
24/7 MOB health and safety cover for organisations which have employees
spread out over very large areas, with individuals often working alone either
on or next to water. This system has been used at water reclamation plants,
refuelling jetties and fish farms both at sea and in shore.
7.1 UNMANNED AREA CREWGUARD® lone worker man overboard
MONITORING system
This system is made up of the following components
• 1 × Cabinet mounted Crewguard® CG-121 MKII monitor alarm
(with auto-dialler depending on requirement)
• 1 × High gain external antenna with 20m cable, (plus xtures and ttings).
(External siren with strobe light if required).
• MOB alerting units (PLBs) as required (sold separately) with optional lifejackets
This system provides automatic 24/7 man overboard cover for all types of
jetties and large areas of water, it is an automated version of the Crewguard
system which uses a telephone auto-dialler (either land-line based or GSM)
to notify key persons if there is a MOB incident.
(For further information refer to Alerting Unit handbook)
PRODUCT NAME – CREWGUARD LONE WORKER MONITORING SYSTEM
(For declaration of conformity refer to individual component products in this manual)
sMRT Crewguard User Manual v1.1
MRT Ltd. © 2014
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7.2 Monitor on jetty or control room on platform
The telephone auto-dialler MOB monitor/alarm system. Several telephone
numbers can be programmed into the auto-speech dialler. A personalised
voice message is recorded onto the auto-dialler by the user; for example
“May Day, May Day, May Day, Man Overboard at position 1 …(Position 1
for a system with a single monitor in one location only, position 2 for a
system with 2 monitors in different geographic locations...ongoing as
required for systems which have several monitors covering a large
geographical area). In the event of a man overboard incident the SOS
signal from the Alerting Unit worn by the man overboard will trigger the
Crewguard MOB monitor alarm which in turn activates the telephone
auto-dialler - automatically calling the first member of staff from the
pre-programmed list of telephone numbers if they fail to answer it will
continue to dial every number on the list until someone acknowledges the
phone call and takes appropriate action.
A fast rescue craft fitted with a SARfinder® locator unit could then be
launched to track the SOS signal being transmitted by the man over
board’s PLB.
There may be differences in the type of dialler fitted into the cabinet
mounted monitoring system, please refer to the manufacturer’s instruction
manual supplied with your system.
Dimensions – Cabinet Approx. Height = 40cm, Depth = 15cm, Width = 30cm
• Weight – Approx. 7.5kg
• Temperature Range -20°C + 60°C
• Waterproofing IP-65
• Power Supply basic system 12V – Cabinet mounted option comes
supplied with mains 12V adapter and universal plug fittings.
MRT Ltd. © 2014
sMRT Crewguard User Manual v1.110
7.3 The MOB alarm on the Crewguard® monitor will sound & the warning
lights will flash on and off.
7.4 The MOB alarm will activate accompanied by a telephone call playing
your pre-recorded SOS, “May Day, May Day, May Day …Man Overboard
at position 1” telephone message.
7.5 Press the RESET button to cancel the alarm or cancel remotely using
phone (full instructions on how to cancel alarm can be found in supplied
auto-dialler manual).
7.6 To test for the best coverage use a test beacon at regular distances
away from the receiving antenna until the alarm no longer activates, this will
indicate the maximum range of the system. To find out if you have any radio
blind spots move around your area and repeat the above test process. To
overcome radio blind spots increase the height of the external antenna or
reposition the antenna.
MRT Ltd. © 2014
sMRT Crewguard User Manual v1.111
8 •Warranty
Your unit is covered by a standard 1 year parts and labour warranty. Marine Rescue
Technologies Ltd (MRT) warrants to the purchaser that the products conform to
manufacturers specifications and that the products are free of defects on materials and
workmanship for a period of one year from the date delivered to the customer/end user.
In the event of a defect, due to faulty material, design or construction, the customer will
return to MRT at the business address where we, or the manufacturer will undertake, at
our choice, a repair or replacement. Warranty covers all parts, materials and labour,
provided that the product is returned to our works. Exclusions: damage caused by other
than normal use and lack of general care and attention or incorrect sealing of the unit
carried out in accordance with this instruction manual. MRT Ltd. does not accept any
responsibility or any claim for direct or indirect consequences of defects of the
equipment, either during the guarantee period or at a later stage.
Repairs
MRT Ltd. offers a full and comprehensive service and repair facility with return normally
within 14 days upon receipt of customer’s authorisation.
Disclaimer
The Sea Marshall® products are an aid to recovery only, it is the responsibility of the
user/operator to ensure they are fully conversant with the operation of the equipment
and the equipment is kept in full working order at all times combined with functionality
and damage checks before and after each use. MRT Ltd. does not accept liability for loss
of life or injury caused during any accident during which the equipment is being used,
howsoever it arises. Sea Marshall® Alerting Units/MSLDs are an ‘Aid to rescue only’, they
do not guarantee your safety. The Sea Marshall® MSLDs will dramatically increase the
chances of detection and location of a Man Over Board. Personal safety remains at all
times the sole responsibility of the individual. It is the responsibility of the individual to
inform their local Coast Guard, their senior personnel/crew members and or family of
their intended location/destination and estimated duration of journey. It is also the
responsibility of the individual to notify these people of the type of safety equipment
they will be carrying. In the case of accidental activation the user should de-activate the
unit and notify the appropriate SAR Authority.
Manufacturer and distributor of global leading Man Overboard Solutions from
Marshall House lZarya Court lGrovehill Road lBeverley lEast Yorkshire lHU17 0JG lUnited Kingdom
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