Backlight And Night Mode; Man Overboard (Mob); Alarms - NorthStar EXPLORER 557 Installation And Operation Manual

2-4 Backlight and night mode

To go to the Backlight display, press
When you have finished, press
Backlight
The display and keys are backlit. To change the
backlight level, select Backlight , then press
to dim or to brighten.
Tip: Press twice to give the brightest screen,
with maximum backlight and Night mode off.

2-5 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 557/567 does not
have a GPS fix.
1 Press .
The 557/567 stores the boat's position as a
waypoint called MOB.
2 The 557/567 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 557/567 changes to plotter mode
(a white display with crosshatching and no
chart details, see section 15-2).
3 The 557/567 sets the MOB waypoint to be the
destination to navigate to.
If the NMEA output (autopilot) is off (see
section 15-10) use the 557/567 to manually
navigate to the destination MOB waypoint
(see sections 3-1-1 and 3-1-2).

2-6 Alarms

When the 557/567 detects an alarm condition, it
displays a warning message on the display, the
internal beeper sounds and any external beepers
or lights operate.
12
briefly.
.
Northstar Explorer 557/567 Installation and Operation Manual
Night mode
Night mode sets the palette for all displays.
Normal palette, for daytime
A palette optimised for night time.
To change mode, select Night mode, then press
. To change only the chart palette, see section
15-2.
If the NMEA output (autopilot) is on, the
557/567 asks if the autopilot is active. Select:
No: Use the 557/567 to manually navigate to the
destination MOB waypoint (see sections 3-1-1
and 3-1-2).
Yes: The 557/567 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 557/567 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
sound again if the alarm condition occurs again.
The 557/567 has user settable alarms plus an
alarm for loss of GPS fix (see section 15-8).