Note:
• The high brightness LED on the device flashes the SOS signal in
Morse code every minute when the device is activated.
• The device transmits the MOB ACTIVE signal every minute with
the latitude and longitude position. If the GPS location cannot be
updated due to weather conditions, the last obtained latitude and
longitude GPS position is transmitted.
• The MO520 is new to the market and not all chart plotters with
AIS show the correct icon as recommended by the IMO and may
instead show the same icon as used for other craft, the . The
MMSI number dedicated for AIS MOB begins with 972 which will
differentiate AIS MOB from other AIS targets. Please contact your
plotter manufacturer to ascertain how the icon displays on the
screen.
• Ensure that the MO520 remains out of water when attached to a
life jacket as water may cause difficulties for the GPS receiver to
obtain coordinates.
• Ensure that the blue area marked “GPS Area” is not covered in any
way and it is directed towards the sky when the device is activated.
• The device emits low levels of radio frequency energy when
activated. Avoid handling the antenna when the device is activated.
Turning off the MO520
To stop the MO520 from transmitting,
reinsert the activation tab into the
device. If the device was activated by
the water sensor, pull the tab off and
reinsert it to stop transmission.
Wrap the antenna around the unit back to its original position. Align
the antenna cap with the longer side on the front of the unit and the
shorter side on the back of the unit. Push the antenna cap all the way
until the antenna cap clips back in. Fitting the antenna cap properly
ensures that the water sensors are properly sealed from the elements
preventing the device from activating accidentally when wet.
MO520
Battery Life Test
Start the battery life test by using the magnet on
the back of the test tab to touch the test area for
one second. The high brightness LED flashes and
the device beeps once indicating that the device
is in battery life test mode. A green flash indicates
that the battery has passed the test. A red flash
indicates that the battery has low power and needs
to be replaced. The device flashes three times and
beeps once to end the test.
Full Function Test
Start the full function test by using the magnet on
the back of the test tab to touch the test area. The
high Brightness LED flashes once and the device
beeps once. Hold the magnet next to the test area
for three seconds. A second beep indicates that
the device is in full function test mode. The battery
LED and the GPS LED flashes every three seconds
to indicate the battery and GPS locating status:
• A green battery LED indicates that the battery
has passed the test. A red battery LED flashing
indicates that the battery has low power and needs to be replaced.
• A green GPS LED flashing next to the antenna indicates that a GPS
fix is obtained. A red flashing GPS LED next to the antenna indicates
that a GPS fix cannot be obtained.
Testing the MO520
Two different tests can be performed to ensure that the device is
working properly:
• The battery life test.
• The GPS self-test that includes GPS activation and live test message
transmission.
The device starts sending MOB test messages as
soon as a GPS fix is obtained displaying the icon
on all AIS systems within range. The full function
test completes with a beep after eight bursts of
test messages are successfully transmitted. The full
function test is regarded as failed if no valid GPS data
is obtained within five minutes.
If the full function test fails, make sure that the antenna is pointed
towards the sky and the GPS area marked on the device is not
obstructed by your hand or any other object before running the test
again. Return the device to your service centre if the full function test
fails a second time.
Note:
• The test mode can be interrupted at any time by pulling off the
activation tab and reinserting it. The device does not transmit
distress messages while in test mode with the activation tab
removed. There is no risk of activating distress transmissions if the
activation tab is pulled off to abort the test mode.
• The test messages generated by a full function test appear on all
chart plotters in range, with AIS plotters displaying SRMs (safe
related messages) as “MOB TEST” with the device’s MMSI number
as the sender’s identity.
• It is recommended that the short test is performed monthly.
• Confirm that battery expiration date has not been reached. Return
the MO520 to a service centre for battery replacement if the battery
level is low.
VHF PERFORMANCE
Frequency
AIS 1, 161.975MHz
AIS 2, 162.025 MHz
Data Rate
9,600bps
Tx Power
2W (1W EIRP)
Bandwidth
25 KHz
Modulation
GMSK
Range
4nm typical with receiver antenna > 5m above sea level
AIS Message Type
Message 1 (UID, GPS position, SOG, COG)
Message 14 (MOB ACTIVE or MOB TEST)
BATTERY
Type
Primary Lithium (not rechargeable)
Operating Time
36 hours at -10°C, typical
Storage (battery life)
5 years, replacement due after emergency use
ACTIVATION METHOD
Manual activation or automatic activation with water sensor by immersion
Note:
Specifications are subject to change without prior notice.
APPLICABLE STANDARDS
ENVIRONMENTAL
IEC 60945 (2002)
EN 303098 V2.1.1
Operating Temperature -20°C~55°C
IEC 61108-1 (2003-07) EN 50385: 2002
Storage Temperature
-30°C~70°C
EN 50383: 2010
EN 62311: 2008
Waterproof
IP68
EN 62368-1: 2014 + A11: 2017
Immersion Depth
(optional)
50m
GPS PERFORMANCE
Compass Safe
Distance
0.8m
Receiving Channels
72
Explosion Proof
(optional)
Ex ec mc IIC T6 Gc
Frequency
L1, 1575.42 MHz
GENERAL/PHYSICAL
Tracking Sensitivity
(-)163 dBm
Model No.
MO520
Reacquisition
(-)159 dBm
Size
129x52x40mm
(L*W*D)
Position Accuracy
< 2.0 m SBAS
Weight
160 g (main unit
only)
< 2.5 m Autonomous
Specifications
