
43
Chapter 5: Alarms
A range of alarm functions are available, to alert you to
particular events. When an alarm occurs, a popup box
is displayed and an audible alarm indication may
sound. The popup identifies the reason for the alarm.
If an alarm occurs you can silence it by pressing
CANCEL
, or switching to
STANDBY
(if in AUTO mode).
The following alarm functions are supported by the
ST70, although they may not all be applicable to your
system.
Alarm Description Action
Calibration required The pilot has not been fully cali-
brated. This will appear for a few
seconds after initial power-up.
Self-cancelling.
Change mode.
Off course Vessel is off course by more than
the predetermined limit. May
appear in Auto, Track and Wind
Trim modes.
Change mode.
Change course.
Reduce heading error.
Route complete Indicates completion of a route,
when in Track mode.
Change mode.
Large Cross Track Error The cross track error (XTE) is
greater than 0.3nm. May appear
when in Track mode or when
entering Track mode from any
other mode.
Change mode.
Data flagged as valid.
Loss of waypoint data Loss of waypoint data Change mode
Wind shift Apparent wind angle has changed
by more than 15 degrees.
Change mode.
Change course.
Reduction in change of wind
angle.
Auto release Safety alarm.
Auto release (SD) Safety alarm.
Drive stopped Safety alarm. A rudder stall condi-
tion has persisted for more than a
predetermined time, and power
has been removed from the drive
unit. May appear in Auto, Track
and Wind Trim modes.
Change mode.
Reversal of drive demand.
No control head Safety alarm.
Seatalk 1 fail Safety alarm.
Seatalk 2 fail Safety alarm.
EEPROM corruption Safety alarm.
No pilot Safety alarm.
Variable text general
alarm
Safety alarm. Safety alarm.
No compass Safety alarm.
M
WE
S
N
SOG KTS
6.2
AUTO
OFFCOURSE
Press CANCEL to silence alarm
Steer to STARBOARD
D10938-1
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