Man Overboard (Mob); Alarms; Simulate Mode - Navman Datahelm 8120 Installation And Operation Manual

2-4 Man overboard (MOB)

The MOB feature saves the boat's position
CAUTION
!
and then navigates back to this point.
WARNING
!
MOB will not work if the Instrument does
DANGER
not have a GPS fix.
CAUTION
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 17-2).
3 The Instrument sets the MOB waypoint to
be the destination to navigate to.
If the NMEA output (autopilot) is off
(see section 17-10) 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.

2-6 Simulate mode

In Simulate mode, the Instrument ignores
data from the GPS antenna and other
transducers and sensors and the Instrument
generates this data itself. Otherwise, the
Instrument functions normally.
There are two simulate modes:
• Normal: Allows a user to become familiar
with the Instrument off the water.
• Demo: Simulates a boat moving along a
route and automatically displays different
Instrument functions.
12
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
CAUTION
!
MOB waypoint.
WARNING
!
This might result in a sudden and
DANGER
dangerous turn.
No: disengage the autopilot; then use
CAUTION
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 5-2-5.
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 17-8).
To start and stop Simulate mode, and for
more information, see section 17-14. In
simulate mode, Simulate or Demo flashes at
the bottom of the window. CAUTION
!
WARNING
!
Never have Simulate mode on when using
DANGER
the Instrument to navigate on the water.
CAUTION
8120 Installation and Operation Manual