Master Systems - Simrad AP70 Operator's Manual

2.
Accept the command request on the active unit
-
All passive units will be opened for command transfer, indicated as below
-
The lock function will be de-activated, and the lock symbol removed from all units
3.
Take command on selected remote unit

Master systems

The international standard for heading control systems (ISO 11674/16329) requires controlled
command transfer when remote stations are provided. The delegation of control to the
remote station and the return of control shall be incorporated in the autopilot system, and
shall avoid unintended operation from a remote station.
To fulfill this requirement the AP70/AP80 system includes a Master function. This is used in
Wheelmarked systems where you permanently want to control command transfer to remote
stations.
In a Master system, one steering station is defined as the Master station. There can be several
control units in a master station, but only one of them can be set as the Master unit.
All units included in the master station will be unlocked, and command transfer within the
master group will be as in an open system.
Units not included in the master station will be locked. It is not possible to take command
from units outside the master station unless the master control unit opens for this. All units
outside the master station will have a lock symbol.
In the illustration below the main bridge is defined as master station. One QS80, one AP80
control unit and one AP70 control unit are included in the master station. The AP80 control
unit is defined as the Master unit.
The illustration includes SimNet group settings for each unit, showing how the units are
defined as part of different SimNet stations.
Delegation of control in multiple station systems |
Passive units
MAIN BRIDGE
AFT STATION

AP70/AP80 Operator Manual

WING STATION

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