Furuno TECDIS Installation Manual page 73

TECDIS Installation Manual
Item Fail
Position sensor antennas
1
to be blinded off.
2 Disconnect position
sensor on a straight leg.
Disconnect position
3
sensor during max radius
turn.
Turn Heading Control
4
System rudder limit to
min value during min
radius turn.
5 Disconnect serial
link to heading
controller during
straight leg.
Disconnect serial
6
link to heading
controller during
turn.
Disconnect speed log
7
during straight leg/
or turn.
8 Simulate failure in
ECDIS.
Simulate failure in
9
conning display.
Disconnect rudder
10
feedback.
Simulate failure in
11
Autopilot
Simulate failure in
12
No.1 gyro.
Check that second gyro
13
is automatic applied in
case of failure in the
active gyro.
Fail to Safe Properties
Track Control (TCS)
When either of position sensor
acquisition stops, TCS emits alarm but
continues to function utilizing acquired
position from other position sensor,
LOG, and GYRO. When both position
sensor acquisition stops, TCS emits
alarm but begins navigation utilizing
estimated position made available by
LOG and GYRO. Then it (after 10min)
automatically switches to Radius mode
and manual maneuver will be in effect.
Same as above
Alarm will be emitted only from ECDIS
which places no influence on TCS
function.
Not available.
Emits alarm and stops TCS function
simultaneously. It automatically
switches to Radius mode and manual
maneuver will be in effect.
Emits alarm and stops TCS function
simultaneously. Automatically switches
to Radius mode and manual maneuver
will be in effect after turning to the pre-
determined maximum degree.
Although emits alarm, two position
sensor data inputted maintains the
normal function.
Same as item 5 or 6.
Not influential
Emits alarm by Alarm System. If the
deviation between order rudder angle
and actual rudder angle is 5deg or more,
the Alarm System emits alarm and
freezes the actual rudder angle at this
time.
Emits alarm by Alarm System and stops
TCS function. Rudder angle is frozen at
this time.
Not influential
Not influential
Test
Remove No.1
position sensor
antenna
Remove No.2
position sensor
antenna
Remove No.1/2
position sensor
Remove No.1
position sensor
output connector
during maximum
radius turn.
Adjustment of
rudder limit is not
available.
Remove Track
Control connection
from ECDIS while
sailing straight
ahead.
Remove signal
cable exclusively in
use for Auto Pilot
outputted from
ECDIS while
turning.
Remove LOG input
outputted to ECDIS
while turning.
Turn off ECDIS
Turn off Conning
Display
Remove rudder
feedback input
outputted to Alarm
System while
turning.
* This test is
dangerous !
Remove power
connection to
autopilot while
turning.
* This test is
dangerous !
Switches
automatically
from No.1 to No.2
Page 72
Result