Alert text Description Type
Cate-
gory
Train TGT CPA FAIL Training target CPA out of range W A
Train TGT TCPA
FAIL
Training target TCPA out of range W A
Trigger FAIL Trigger failure W B
TT Capacity 95%
Tracked target processing/displaying is about to
be exceeded
C B
TT Capacity Full Tracked target capacity exceeded W A
TT Lost: # Tracked target # is lost W A
UTC Data FAIL UTC data failure W B
Radar Video FAIL Radar video failure W B
Operating modes fallback
The following table shows possible failure categories, and which operations that are allowed
or not allowed when the failure occurs.
Failure Possible alert Fallback
arrangement
Function Inhibited
Heading failure GYRO FAIL
Automatic
switch to relative
motion head-up
mode
• AIS
• Acquiring/Tracking radar targets
• Geographically referenced maps
• North Up/Course Up orientation
• True motion presentation
• True trails
Speed through
water failure
Speed LOG FAIL
STW FAIL
Possible to set
Manual speed
• AIS
Course and
speed over
ground failure
Speed LOG FAIL
SOG FAIL
EPFS speed FAIL
Automatic
switch to relative
motion, relative
vectors and sea
stabilization
• True vectors
• Geographically referenced maps
• True motion presentation
• True trails
Position input
failure
POSN Invalid
POSN
Unavailable
• AIS
• Geographically referenced maps
Radar video
input failure
RADAR FAIL
Possible to
display target
information
based on AIS
data
• Acquiring/tracking radar targets
• True motion/ True trails
• Radar video presentation
AIS input failure AIS FAIL
• AIS
The alert system | R5000 Operator manual
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