NorthStar Navigation EXPLORER 657 Backlight and night mode, Night mode, Man overboard MOB

2-3 Backlight and night mode

To go to the Backlight display, press				briefly.	Night mode
Backlight					Night mode sets the palette for all displays.
						Normal palette, for daytime
The display and keys are backlit. To change the
						A palette optimised for night time.
backlight level, highlight select Backlight, then
press	to dim or		to brighten.		To change mode, highlight Night mode, then
When you have finished, press					press	or	. To change only the chart
					palette, see section 17-2.
Tip: Press		twice to give the brightest

screen, with maximum backlight and Night mode off.

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 657 does not have a GPS fix.

1Press .

The 657 stores the boat’s position as a waypoint called MOB.

2The 657 changes to the chart window, with the MOB waypoint at the center of the chart.

The chart zooms in for accurate navigation. If the chart can not show the required small scale, the 657 changes to plotter mode (a white display with crosshatching and no chart details, see section 17-2).

3The 657 sets the MOB waypoint to be the destination to navigate to.

If the NMEA output (autopilot) is off (see section 17-11) use the 657 to manually navigate to the destination MOB waypoint (see sections 3-1-1 and 3-1-2).

If the NMEA output (autopilot) is on, the 657 asks if the autopilot is active.

Select:

No: Use the 657 to manually navigate to the destination MOB waypoint (see sections 3-1-1 and 3-1-2).

Yes: The 657 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 657 to manually navigate to the destination MOB waypoint (see sections 3-1-1 and 3-1-2).

To cancel MOB or set another MOB

1Press 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.

12 Northstar Explorer 657 Installation and Operation Manual