NAV4 Plus User Guide Issue 2 - ICS Electronics Limited

NAV4plus User Guide
• WATER refers to the course and speed of the vessel through the
water
• LOG is a running distance total as provided by the system speed
log
• WIND is displayed in the format provided by the wind
instruments
• DEPTH is displayed in the format provide by the depth sounder,
including any keel offset set. Some depth sounders give out
several different unit values (feet, meters, and fathoms) just the
first value provided is selected for printing
• When you first use the NAV4plus the position logging function is
turned off
Position logging can be turned on and set to give log printout at
intervals of 15 and 30 minutes or 1, 3, 6 or 12 hours. Refer to the
‘NAV4plus Set-up’ section for details.
The NAV4plus will automatically stop log printouts when you are
alongside or at anchor, this is done by sensing that the GPS position
is no longer changing.
• Log printing will resume once the vessel’s movement over a 1nm
line of position is detected
• If you find that the log printout continues when you are moored
up, it is possible that the ‘selective availability’ feature of the
GPS satellite system is causing the vessels position to wander
across a 1nm line of position. (Note that at the time of publishing,
selective availability had been turned off by the US government).
Do not turn the GPS off when in port if you intend to leave the
NAV4plus running in AUTO NAVTEX. If you do, be prepared for
a lot of printout as without a valid GPS position ALL NAVTEX
STATIONS may be automatically selected.
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