Note:
• The high brightness LED on the device ashes 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
dierentiate 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 diculties 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 o 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 o 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.
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 ashes and
the device beeps once indicating that the device
is in battery life test mode. A green ash indicates
that the battery has passed the test. A red ash
indicates that the battery has low power and needs
to be replaced. The device ashes 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 ashes 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 ashes 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 ashing
indicates that the battery has low power and needs to be replaced.
• A green GPS LED ashing next to the antenna indicates that a GPS
x is obtained. A red ashing GPS LED next to the antenna indicates
that a GPS x cannot be obtained.
Testing the MO520
Two dierent 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 x 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 ve 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 o 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 o 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.
• Conrm 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: Specications 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
Specications
