6. MAINTENANCE, TROUBLESHOOTING
6-14
6.9 Fallback Arrangements
If the top priority sensor (for example EPFS1) cannot be used, this equipment auto-
matically uses the second priority sensor (for example, EPFS2) when multiple sensors
(EPFS1 and EPFS2 for example) are installed. When there is no fallback sensor avail-
able, each function is limited as follows:
Sensor Function limitations
Heading
sensor
• The [HDG] indication reads "***.*°"
• The orientation mode is automatically set to [HEAD-UP].
• TT, AIS, radar map and echo averaging are disabled.
Speed
sensor
When [LOG(WT)] is selected:
• The sensor used is automatically switched in the following priority order:
EPFS(BT) → LOG(BT).
• The SPD indication reads "***.* kn" when both EPFS(BT) and LOG(BT)
cannot be used.
When [LOG(BT)] is selected:
• The sensor used is automatically switched in the following priority order:
EPFS(BT) → LOG(WT).
• The SPD indication reads "***.* kn" when both EPFS(BT) and LOG(WT)
cannot be used.
When [EPFS(BT)] is selected:
• The sensor used is automatically switched in the following priority order:
LOG(BT) → LOG(WT).
• The SPD indication reads "***.* kn" when both LOG(BT) and LOG(WT)
cannot be used.
COG/SOG
sensor
• When the EPFS sensor cannot be used, the values of COG and SOG
are calculated from HDG and LOG(BT).
• Additionally when the heading sensor cannot be used, the values of
SOG is calculated from LOG(BT). The COG indication reads "***.*°".
Position
sensor
• The POSN indication reads all asterisks.
• AIS and radar map are disabled.
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