Navitron
Systems Ltd
Autopilot Type NT777
Technical Specifications

Supply Voltage
11-40Vdc
Progammable LCD Display
(75 x 53mm Control Panel Window): -
Actual Heading
° MAG or TRUE
Power Consumption
12v
24v
Set Course
° MAG or TRUE
Off
4.2W
4.3W
Rudder Angle
Bar Graph and 2 Digit
Standby
4.6W
4.8W
Rudder Control
Setting Value (1 - 9)
On
5.1W
5.3W
Yaw Control
Setting Value (1 - 9)
Illumination (max)
+1.5W
+1.5W
Counter Control
Setting value (1 - 9)
XTE Track Mode
XTE Amount (nM)
XTE Direction
(Left/Right)
Data Type Update
(every 18secs)
Solenoid Switch Ratings: -
Voltage
11-40Vdc
Current
5A (max)
HTS Track Mode
Heading to Waypoint
(xxx.x°)
ErrorValue
(xxx° Left/Right)
Data Type Update
(every 18sec)
Switchline Polarity
Installation Selectable
(Common +ve or Common -ve)
Switch Type
Solid State
Autopilot Operating Mode Displays
Operator Controls: - Standby - Manual Steering
Yaw
Select keypad + illum
Autopilot Steering (On)
Rudder
Select keypad + illum
Auto Track Steering
Counter
Select keypad + illum
Remote Auto Steering (other station on)
Autopilot Mode (Off/Standby & On Keys)
Track
Keypad On/Off
Off Course Alarm
Program. 3-30 °/Off
Autotrim
Keypad Off/Set
Watch Alarm
Program. 3-12 min
Illumination
Variable Red LED Backlight
Screen Display Alarm Messages:-
Custom Turns:-
33 in total including:-
Dodge/Custom Keypad selectable D.BOX FAIL COMM FAIL
+/- 1 / +/- 5 Deg Keypad selectable SET DAT FAIL TRACK +/- 30
Cancel/Confirm Keypad selectable +7V FAIL STEER'G FAIL
+3.5V FAIL COMPASS FAIL
Heading Input Sentences from GPS / Mag
Compass etc: -
REMOTE FAIL HDT 1 FAIL
HCC 1 FAIL HDM 1 FAIL

NMEA

0183

MAG
GPS
NO XTE DATA HDG 1 FAIL
NO HTS DATA R.R.U. FAIL
XX HDM XX HDG XX HCC XX HDT
XX HDT
XX HDM
XX HDG
XX HCC
DATA ERROR CPS.HI FAIL
LIM/SWT OPEN CPS.LOW FAIL
Diagnostic Mode Display Messages
9 Diagnostic Display Sets (step selectable)
XTE Input Data (from GPS/Plotter etc.): -
NMEA 0180
CTE
Mechanical
NT777 Control Unit
NT777 Distribution Unit
NMEA 0183
XX APA, XX APB
XX RMB, XX XTE
Width
192mm
270mm
Height
120mm
175mm
Depth - (C/U behind bezel)
48.4mm
66mm
Heading to Steer Data (from GPS/Plotter):-
Bezel Depth
14mm
N/A
NMEA 0183
XX HTC, XX HSC,
XX APB
Compass Safe Distance
0.4m
0.4m
Weight
1.2Kg
1.5Kg
Heading Output to Radars / Track Plotters etc.
1Hz
11Hz
22Hz
NMEA 0183
Sentence types
@ 1, 11 & 22Hz
MAG
APHDG
APHCC
HCHDG
HCHCC


HCHDG
HCHDM


HCHDM
GYRO
HEHDT AGHDT
HEHDT
HEHDT
Furuno Format Selectable 0.1° or 0.166° resolution
Selectable 5Vpp or 11Vpp output
Selectable 5Hz or 40Hz update rate
Click for dimension and mounting details for the NT777 Click for dimension and mounting details for the NT777 Click for information on the NT920URB Click for information on the NT920RAI Click for information on the NT920WA Click for information on the NT990FU Click for information on the NT920NFU Click for information on the NT920HRC Click for information on the NT920DHR Click for information on the NT920AHR Click for information on the NT920HDI Click to view image of the NT920RRU


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