Chapter 1: Basic operation
11
1.7 Alarms
The SPX-5 Tiller system supports the alarms listed on the following pages. When an
alarm occurs, a beep sounds and the appropriate alarm message is displayed.
Responding to alarms
•
Unless otherwise stated, if an alarm occurs, press
standby
to clear the alarm and
return to hand steering.
•
If more than one alarm occurs, as each alarm is cleared, the next is displayed.
Message
Description and possible actions
LARGE XTE
Large cross track error
Occurs if the cross track error exceeds 0.3 nm. The alarm clears if the
heading recovers.
MOB
Man OverBoard alarm
The SPX-5 Tiller system activates the Man Overboard alarm if it
receives a man overboard (MOB) message from another instrument
on the SeaTalk system. It displays the text MOB instead of the way-
point number on the XTE, DTW and BTW data pages.
If the autopilot is in Track mode, it will sound the Waypoint Advance
alarm to notify you of the change in waypoint.
NEXT WPT?
Waypoint advance alarm
The SPX-5 Tiller system activates the Waypoint Advance alarm
whenever the target waypoint changes. This occurs when:
•
you select automatic acquisition by pressing
track
from Auto
•
you request waypoint advance by pressing
track
for 1 second in
Track mode (with SeaTalk navigators only)
•
the boat arrives at the target waypoint and the navigator accepts
the next waypoint
•
you activate the Man Overboard (MOB) function in Track mode
When the alarm sounds, the pilot continues on its current heading but
displays:
•
the bearing to the next waypoint
•
the direction the boat will turn to take up that bearing
Responding to a Waypoint Advance alarm
To respond to a Waypoint Advance alarm:
•
check that it is safe to turn onto the new track, then press
track
to
accept the waypoint advance
•
alternatively, you can cancel the alarm without accepting the
waypoint advance by pressing:
standby
to return to hand
steering, or
auto
to return to Auto mode.
•
Note: Waypoint advance only operates if the SPX-5 Tiller system
is receiving valid bearing to waypoint and waypoint number
information.
