Raymarine ST70 Instrument, User Reference Handbook

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3.4 ST70 Alarms
Alarms are used to alert you to a situation or hazard requiring your
attention.
Some examples of alarms are:
• Anchor alarm — Used under anchor, this alerts you to a change in
depth which could mean that the chain length requires adjusting.
• Depth and speed alarms — These alarms alert you when the
depth or speed exceeds a specified limit, for example a minimum
depth.
• MOB (Man Overboard) alarm — Received from an MOB system.
When an alarm occurs, a message is displayed and an audible
alarm may sound.
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ft
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Tim e
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D11852-1
You can either:
• Silence the alarm, or
• edit the alarm settings.
Man Overboard alarm
In the event of a Man Overboard (MOB) alarm, the instrument
provides a range of information to help find the MOB target.
• BTW: Bearing to MOB waypoint.
• DTW: Distance to MOB waypoint.
• Elapsed: Time since start of MOB alarm.
BTW and DTW require data from other sources such as a GPS
and multifunction display. If these are not available then only the
elapsed time is displayed.
Using the ST70
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