Navitron
Systems Ltd
Autopilot Type NT888G
Technical Specifications

Certification Standards: -
Fully Type Approved to ISO 16329 (HSC Code) ISO11674 & IMO A342 (IX) as amended by MSC64/67 Annex 3. Wheelmarked in accordance with MED 96/98/EC

Autopilot Input / Output Specifications

Inputs:-
Inputs:-
Supply Voltage
Range
11- 40Vdc
NMEA 0183 Heading Data
(Isolated RS422 / 485)
Power Consumption
10W
Channel 1
Update Rate
Selectable @
1Hz, 10Hz, 20Hz, 40Hz or 50Hz
Illum Max
2W

Sentence Types (Mag/Gyro versus Update Rate)

Hz
Mag
Gyro
Mag Heading Input Port
1
$HCHDM
$HEHDT
Navitron HSC etc.
Coil Type
HSC 1 or HSC 2
$HCHDG
$AGHDT
$APHDM
$HETHS
Resolution
0.25°
$APHDG
$AGTHS
10
$HCHDM (5Hz)
$HEHDT
Gyro / Mag heading Input Ports
$HCHDG
$HETHS
Channel 1
Mag
Gyro
20
$HCHDM
$HEHDT
NMEA 0183
(Gyro / Mag and
4800 / 38400 baud
Selectable)
$XX HDM
$XX HDT
40
$HCHDG
$HEHDT
$XX HDG
$XX HDM
50
$HCHDG
$HETHS
$XX HCC
$XX HDG
Resolution
0.1°
$XX HDT
$XX HCC
Channel 2
10
$APROR
$AGROR
Channel 2
Mag
Gyro
$APTRC
$AGTRC
NMEA 0183
(Gyro / Mag and
4800 / 38400 baud
Selectable)
$XX HDM
$XX HDT
Autopilot Status Data
1
$APRSA
$AGRSA
$XX HDG
$XX HDM
$APHTD
$AGHTD
$XX HCC
$XX HDG
$XX HDT
$XX HCC
Furuno Heading Data
Resolution
0.1°
Update Rate
Selectable @ 5Hz or 40Hz
Resolution
Selectable @ 0.166 or 0.1°
Follow Up Rate (minimum)
Signal Amplitude
Isolated 5Vdc (RS422 / 485)
All Heading Input Types
30° / Sec
Output
20mA Max (Source / Sink)
Step by Step Heading Data
NMEA Speed or Pulse Input Data
Steps per Degree
Selectable @ 3, 6, 12 or 14
Speed over
Ground (SOG)
$XX VBW
$XX VTG
Signal
Amplitude
5Vdc
Speed Through Water (STW)
$XX VBW
$XX VHW
Maximum
Rate
Selectable @ 8, 16 or 24°/Sec
200/400 ppNm
5-24Vp/p STW in only
Z out
470R
Draft Input Data
Analogue
4 - 20mA
Dual +/- 10Vdc Analogue outputs
Z out 200R
Track Steer Data Input Ports
NMEA 0183 Track
Data from Track
Control System
(Priority as shown)
$XX HTC
$XX APB
$XX HSC
Dual 4 - 20mA
Outputs
Max Voltage / Load Res,. 20Vdc / 1K
Dual Solid State Solenoid Switching
Polarity
Comm., +VE / -VE Selectable
Max Rating
5A @ 11 - 110Vdc Max
Operating
Temperature Range
-20 to +60 °C
System Alarms
Main Power fail
Watch Alarm Timeout
Back Up Power Fail
OHA Limit
Heading Data Fail
CCA LImit
Compass Safe Distance
Track Data Fail
Course Change
Control Unit
0.5m
Steering Fail
Track Heading Change
Distribution Unit
1.5m
Dist Unit Fail
Dodge Limit
Rudder Ref Unit Fail
Custom Limit
Mechanical Data
Control Unit
Dist Unit
Limit Switch Status
Remote Control Engaged
CCA Data Fail
Control Unit Fail
Width
204mm
300mm
   
Height
132mm
300mm
Depth - (behind bezel for Control Unit)
48.4mm
120mm
Volt free Auxiliary Alarm Contacts are available (n/o rated 3A) for Watch, Off Heading, Power Fail and System Fail to adittional Alarm units as required.
Weight
1.8kg
9.5kg

Click for NT888G Control Unit Outline & Mounting Dimensions Click for information on the NT920NFU Click for information on the NT920NFU Click for NT888G Distribution Unit Outline & Mounting Dimensions Click for information on the NT925HDI Click for information on the NT920URB Click for information on the NT920AHR Click for information on the NT920DHR Click for information on the NT920NFU Click for information on the NT920WA Click for information on the NT920RAI Click to view image of the NT920RRU

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