Track Control System; Rudder Feedback Unit - JRC ALPHATRON AlphaPilot MFM APH-5 Operation Manual

Vali- Plausi- Integrity
dity bility monitoring
check check
Fail Fail Not possible
Fail Pass Not possible
Pass Fail Not possible
Not possible due
to lack of second
Pass Pass
sensor,
or method
Pass Pass Fail
Pass Pass Pass

7.2.7 Track Control System

WARNING
• This functionality is not compliant to the SOLAS convention before approved as part of a Track Control
System
Autopilot track control mode available in Navis NavAP: "TRACK":
"TRACK" — Full track control on straight legs and turns. Navis NavAP receives commanded Heading-To-Steer
and commanded Rate-Of-Turn from TCS and takes them as a preset heading and preset rate of turn (HTC or HSC
messages). AP operates as a part of TCS Category C.
NOTE
• Only one Track Control Mode can be configured at once only by the Service Engineer on board (using
Menu, setting
Installation
installation of the Navis NavAP Heading Control System.

7.2.8 Rudder Feedback Unit

The Navis NavAP can be connected to a Rudder feedback unit (RFU) with analog output.
RFU type is specified at the time of Navis NavAP installation on the vessel. If MCU/ACU is interfaced with
Steering system (SS) via valves / proportional valves, RFU (Feedback signal) is compulsory to perform rudder
follow-up control.
INS data marking
Validity
flag or Plausibi-
Status flag lity sta-
or Mode tus (e.g.
indicator NSR)
(e.g. GLL)
Invalid No
Invalid Yes
Invalid No
Valid Yes
source
Valid Yes
Valid Yes
mode). Track Control Mode and its interface should be specified during
Track
48
Remark
Integrity
status
(e.g.
NSR)
Failed
Data are marked in yellowish-
orange or displayed with
Failed
yellowish-orange dashes.
The data cannot be used for
Failed
any function.
Doubtful The data are marked by
yellow. The data can only be
used for the Heading control
Failed mode.
Data are suitable for any con-
Passed
trol mode