NT888G MK2 AUTOPILOT OPERATING MANUAL
2.37 Setting the Watch Alarm Period … (Continued).
If the Control Unit alarm is not cancelled by TEST/OFF key operation within a further
one minute period, a relay within the Autopilot Distribution Unit provides volt free
contacts to activate an auxiliary (external) alarm if fitted.
To set the Watch Alarm time interval (OFF or 3 to 12 mins.):-
a)
Use the “
LIMITS
” key to enter the Limits Menu.
b)
Use the “
LIMITS
” key again to select “
WATCH
” box followed by flashing
current value (
OFF or 3 to 12
).
c)
Use the rotary (+/-) illum. control to set the required condition.
2.38 The Track Function.
The Autopilot may be operated in “TRACK” mode when it will steer the vessel along a
pre-planned track or multiple tracks in response to “Heading to Steer” data received
from a proprietary Track Control System.
NB. The NT888G MK2 is a “Wheelmarked” Autopilot (IMO A342(ix) as amended
by MSC 64/67 Annex 3) in addition to HSC Certification (ISO 16329) with an
approved Track steering facility provided the latter is used in conjunction with a
Type Approved Track Control System compliant with IEC 62065.
Functional Description.
When the appropriate track and waypoint coordinates have been entered into a
proprietary Track Control System, resultant Track data is received by the Autopilot
system via the Track data input terminals in IEC 61162 / 1 or IEC 61162 / 2 or NMEA
0183 serial data formats.
The sentence types accepted by the Autopilot system and their order of priority are (i)
$ xxHTC, (ii) $ xxAPB, (iii) $ xxHSC.
“Heading to Steer” data is in each sentence type and is continuously “read” by the
Autopilot system to provide automatic heading changes to next waypoint or to
perform complex manoeuvres based on multiple waypoint entries.
Multiple Straight
and curved Tracks
(If supported by Track
Control System)
Multiple Straight
Leg Tracks
Single Straight
Leg Track
