Man Overboard (Mob); Alarms - NorthStar Multi-Function Unit M121 Installation And Operation Manual

2-4 Man overboard (MOB)

The MOB feature saves the boat's position and
then navigates back to this point.
WARNING
!
MOB will not work if the Instrument does
not have a GPS fix.
1 Press
The Instrument stores the boat's position as
a waypoint called MOB.
2 The Instrument changes to the chart
window, with the MOB waypoint at the
centre of the chart.
The chart zooms in for accurate navigation.
If the chart can not show the required small
scale, the Instrument changes to plotter
mode (a white window with crosshatching
and no chart details, see section 19-2).
3 The Instrument sets the MOB waypoint to
be the destination to navigate to.
If the NMEA output (autopilot) is off
(see section 19-12) use the Instrument to
manually navigate to the destination MOB
waypoint (see sections 3-1-1 and 3-1-2).

2-5 Alarms

When the Instrument detects an alarm
condition, it displays a warning message on
the display, the internal beeper sounds and any
external beepers or lights operate.
Northstar M121/M84 Installation and Operation Manual
If the NMEA output (autopilot) is on, the
Instrument asks if the autopilot is active.
Select:
No: Use the Instrument to manually navigate
to the destination MOB waypoint (see
sections 3-1-1 and 3-1-2).
Yes: The Instrument asks if the boat is to go
to the MOB waypoint.
Select:
Yes: to immediately start navigating to the
MOB waypoint.
WARNING
!
This might result in a sudden and dangerous
turn.
No: disengage the autopilot; then use the
Instrument to manually navigate to the
destination MOB waypoint (see sections
3-1-1 and 3-1-2).
To cancel MOB or set another MOB
1 Press again to display a menu.
2 Select an option from the menu.
Tip: The MOB waypoint remains on the chart
after the MOB has been cancelled. To delete the
MOB waypoint, see section 6-2-5.
Press to clear the alarm. The alarm will
ESC
sound again if the alarm condition occurs again.
The Instrument has user settable alarms (see
section 19-10).
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