NORTHROP GRUMMAN naviguide 4000, User, Installation And Service Manual, Page: 9 / 252

NAVIGUIDE 4000 056336 Rev. AA
1.2: System Components Page 1–3
1.2.4 FU Hand Wheel
FU hand wheels provide follow-up control in the FU bus
steering mode.
One hand wheel (the main helm) may be connected di-
rectly to the Steering Control Interface Unit(s).
Additional hand wheels may be used in combination with
FU Interface/Display Units to provide FU control at re-
mote steering positions via the NAVINET 4000 Steering
Control Network.
1.2.5 NFU Override Unit
The NFU Override Unit allows to quickly
override bus steering mode and assign con-
trol to the associated NFU Override tiller.
Override mode is activated by moving the
override tiller from the midship’s detent. The
tiller remains in control of the rudder until the
operator cancels the override mode („forced
override“). The override capability may be enabled for all bus steering modes or
for specific modes only.