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 fulfil this requirement the AP70 MK2 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 the main bridge is defined as master station. One QS80, and two AP70 MK2
control units are included in the master station. One of the AP70 MK2 control units is defined
as the Master unit. The illustration includes network group settings for each unit, showing
how the units are defined as part of different network stations.
Defining a Master system
A master station is usually defined and units assigned to the master station during system
setup. Refer to the separate autopilot installation manual for details.
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Note:
When a network group Station is set to Master, one control unit in this steering
station has to be defined as the Master unit.
18
Delegation of control in multiple station systems
| AP70 MK2
Operator Manual
