Guardian MOB Beacon Watch
121.5MHz Man Overboard Alarm Watch
User Manual
WARNINGS
Use the beacon function of the Guardian MOB Beacon
Watch only in situations of grave and imminent danger.
The beacon function can only be used in conjunction with a
suitable 121.5MHz receiver.
The beacon function is set at the factory to manual
activation. For automatic activation, the beacon must be
armed by the user. THIS FUNCTION WILL NOT WORK IN
FRESH WATER.
This product contains a lithium battery. Do not puncture,
incinerate or recharge. Dispose of safely.
Use of the beacon may require radio licences, depending on
the country of use.
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Contents
WARNINGS ....................................................................................................................... 2
1. Introduction ................................................................................................................. 4
1.1 Man Overboard Operation ........................................................................................ 4
1.2 Battery Life ................................................................................................................ 5
2. Beacon controls ........................................................................................................... 6
2.1 Transmitter Control .................................................................................................... 7
2.2 ARMING & CONFIRM Button Control ....................................................................... 7
2.4 Transmit (Manually) ................................................................................................... 9
2.5 Disable Transmitting .................................................................................................. 9
2.6 Test Function ............................................................................................................. 9
3. Watch Time Functions .............................................................................................. 10
3.1 Normal Readout ...................................................................................................... 10
3.2 Alarm operation ....................................................................................................... 10
3.3 Setting Sequence .................................................................................................... 11
3.4 Hourly Chime ........................................................................................................... 12
3.5 Chronograph ............................................................................................................ 12
4. Service ....................................................................................................................... 13
4.1 Battery change ........................................................................................................ 13
4.2 Safety ....................................................................................................................... 13
4.3 Spares ...................................................................................................................... 13
5. Training Watch .......................................................................................................... 14
6. Battery reset .............................................................................................................. 15
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1. Introduction
The Guardian MOB Beacon Watch is a full function alarm chronograph which
incorporates an emergency distress transmitter. The transmitter may be activated
automatically if the Watch is immersed in water; it may also be activated manually.
This product is designed to be worn in conditions where the user is at risk of falling
into water and where it may be difficult to locate the person in the water visually. The
beacon is used in conjunction with a receiver to generate an alarm; a direction
finder is available to help locate the person in the water.
1.1 Man Overboard Operation
Once armed, the beacon will activate automatically when immersed in sea water,
and will continue to transmit until disabled. Arming and disabling are detailed in the
Features section. In fresh water the beacon must be activated manually.
The beacon cannot transmit effectively when underwater, and needs to be as high
as possible for best signal range. Ideally, the user should hold up the arm wearing
the watch, but this is impractical for long periods. It is recommended that the arm is
rested on top of the lifejacket, as shown opposite.
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1.2 Battery Life
The battery is designed to power this product for a period of 1 year.
When the battery is running low the LED flashes and the sounder beeps four times,
repeating every minute. This warning normally indicates that the battery has
reached the minimum level at which performance can be guaranteed; any further
deterioration may jeopardise the performance of the beacon in an emergency.
Refer to Page 15 for information on testing the beacon to verify the alarm.
Refer to the Service section for information on replacing the battery.
Beacon transmitting in emergency
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