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Page 68 7 — Other Special Functions
7 — Other Special Functions7 — Other Special Functions
7 — Other Special Functions Rev. D
everal special 941X functions are controlled by the
STAR
function
key (
). These include alerts and alarms, TideTrack™ functions,
and setup functions.
The Northstar 941X has a number of automatic alarms that can alert you
of special situations. For example, when you are approaching a waypoint,
the 941X signals you with a distinctive “beep” and a flashing exclamation
point symbol on the screen.
At any time, you can press the
STAR
button (
) to access the
ALARMS & BACKLIGHT
screen which displays the cause of the most
recent alarm.
The 941X’s alarm types and descriptions are:
TYPE DESCRIPTION
AUTO
CLEAR?
CLOSE
you have come within 900’ of the
arrival circle of the current way-
point (arrival circle radius set
from
ALARMS & BACKLIGHT
screen)
YES, after 5
seconds
ARRIVE
you have entered the arrival cir-
cle of the current waypoint
YES, after 5
seconds
PASS
while navigating to waypoint,
perpendicular to track passed,
but arrival circle was not entered
YES, after 5
seconds
CHANGING
switching to next leg of route
(“NOW NAVIGATING TO . . . ”)
YES, after 5
seconds
AVOIDANCE AREA
avoidance area circle has been
entered
NO: potential
hazard ahead
ANCHOR DRAG
anchor is dragging beyond limit
set from
ALARMS &
BACKLIGHT
screen
NO: requires
immediate
attention
NO LORAN FIX
no position fix received from ex-
ternal loran
YES, when
condition
clears
DGPS LOST
DGPS data timeout exceeded “
NO GPS FIX
no position fix from GPS "
NO LORAN DATA
communication failure with ex-
ternal loran
"
NO GPS DATA
communication failure with GPS "
POOR LORAN FIX
BLINK, CYCLE or LOW SNR
detected at loran
"
CROSS-TRACK
LIMITS EXCEEDED
off-course in excess of limits set
in
CROSS TRACK ALARM
only when
within limits
S
Alarms