Chapter 2: Using the display 27
2.9 Emergencies and warnings
You can use your A-Series display to mark the position of a man
overboard (MOB) or to sound an alarm when a particular situation
occurs, e.g. when a depth limit is reached or a specified period of
time has elapsed.
Man overboard
If you lose a person or object overboard and need to return to the
spot, activate the Man Overboard (MOB) function immediately. The
MOB function is available at all times, whatever application is run-
ning on the A-Series display.
To activate the Man Overboard function
1. Press and hold the WPTS/MOB
key for three seconds.
Placing a MOB marker initiates the following actions:
• MOB waypoint placed at your boat’s current position.
• Alarm sounds in morse code (--- letter O) and is repeated every
30 seconds.
• Positional information including bearing, range and position
are displayed in the databar.
• Navigation functions are suspended and no new GOTO or
route functions are selectable.
• Motion mode on the chart application is changed to autorange
to show the largest possible scale of chart that will include both
the MOB and your boat.
• Current position to MOB position is represented on-screen by
a dotted line.
Note: To obtain an MOB position, you A-Series display must have
a GPS fix.
To cancel an MOB alarm:
1. Press and hold the WPTS/MOB button for four seconds.
Once the MOB alarm is cleared:
• the chart application motion mode is reset.
• the databar mode is reset.
• GOTO and route functions are restored.
Alarms
Alarms are used to alert you of a hazard or particular situation.
When an alarm sounds, a message box appears on-screen to
explain the reason for the alarm.
Cancelling an alarm
There are two types of alarms; system and external.
81314-1_A Series Reference Guide.book Page 27 Thursday, August 28, 2008 9:23 AM
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