dialog. When this occurs the MFD becomes active and the other control units become
passive.
In an Open system, control stations can be temporarily locked to avoid accidental control
from another control unit. When the MFD has control in an Open system, the MFD can lock
and unlock all passive control units. If the MFD is passive and locked, it can request control of
the autopilot from the active control unit. The MFD must accept control from the active
controller after the active controller approves transfer of control to the MFD.
The following indicators are displayed in the Mode button of the Autopilot controller pop-
up:
Passive - MFD does not have control of the autopilot. If only the passive
icon is displayed, it means it is an Open unlocked system and selecting
the Mode button takes control of the autopilot.
Locked system - The key icon indicates it can be a Master system or a
locked Open system.
If the key icon is displayed, and the <10, <1, 10>, 1> buttons are enabled
(red or green colored arrows and white numbers) then the MFD is active
and controls the autopilot.
If the key icon is displayed, and the <10, <1, 10>, 1> buttons are disabled
(black arrows and numbers) then the MFD is passive and does not
control the autopilot. Select the Mode button to request control from
the active control unit if it is a locked Open system, or the master
controller if it is a Master system.
none
Active in Open system - the MFD has control of the autopilot in an Open
system.
Locking and un-locking other control units
Select the Cmd/Thruster option in the Mode selection pop-up to open the Cmd/Thruster
selection pop-up.
Unlock other stations - allows other control units to take control of the autopilot without
requesting permission.
Lock other stations - locks other control units from taking control of the autopilot. When
other control units are locked, they must request control of the autopilot from the MFD.
When control of the autopilot is requested from another control unit, a prompt is displayed
in the MFD to authorize command transfer.
Autopilot | NSS evo3 Operator Manual
59
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