Navitron NT777
Purpose developed for small professional vessel use spanning workboats, pilot and patrol craft, fishing vessels and motor yachts to 25m LOA, the NT777 model is the first of a new digital Autopilot generation designed and manufactured by Navitron Systems Ltd.
Accordingly, the NT777 Autopilot System provides Navitron steering expertise in a robust and compact package based on highly intelligent control and monitoring functions normally only associated with IMO compliant Type Approved models.
Produced and tested in an ISO 9001:2000 environment, standard features include:-
- Dual NMEA Heading Inputs
- Mag Sensor Coil Heading Input
- Multi Waypoint Track Steering
- Multiple Control Unit Options
- Integral Off Course Alarm
- Integral Watch Alarm
- Custom Turn & Dodge functions
- NMEA & Furuno Heading Outputs
- 11-40Vdc Power Supply
- 11-40Vdc/5A rated solid state switch Outputs to Solenoids
Combined with full PID intelligence, auto rudder stability, Autotrim (APH), integral audible/visual Alarm functions with Reset, the NT777 is equipped for precision performance and reliability.
The Autopilot Display may be presented in positive or negative mode as preferred (Set Up Menu Installation Selectable).
Automatic display graphic change occurs when Track Steering Mode is selected and includes regular performance and source data updates. In addition to Track data, the NT777 will also accept NMEA heading data directly from GPS compass systems etc.
When multi Heading Inputs are employed (NMEA + Mag sensor coil) the priority source is installation programmable with automatic changeover in the event of primary source failure.
Suitable for console or bracket mounting, the NT777 Control Unit can be externally located and the overall system is normally supplied complete with Heading Sensor Coil (HSC2) and Rudder Reference Unit (NT920RRU) for installation to solenoid hydraulic systems (11-40Vdc/5A max).
High voltage solenoids (110/220Vac/dc) can also be accommodated via the inclusion of an optional Universal Relay Box.
The NT777 Autopilot system can also be used with alternative Distribution Units to provide ± 10Vdc or 4-20mA outputs required to interface with analogue steering machines.
A high performance multi microprocessor based Autopilot for magnetic/GPS compass and Track steered vessels from typically 10 – 25m (30 – 80ft).
Comprehensively equipped yet simple to operate – and suitable for hull forms from conventional displacement to fast planing vessels – the NT777 Autopilot System can support a maximum of 3 Control Units which connect to a central Distribution Unit.
Model NT777 Distribution Unit.
(Dims 270 x 175 x 66 mm)
Optional Equipment Inputs /Outputs: –
These are available from the standard Distribution Unit and will support a range of equipment and services which include:-
Rudder Angle Indicators
Analague and Digital Heading Repeaters
NMEA Heading Outputs (to Radars etc.)
Navitron & Proprietary Power Steer Controls
Universal relay Box
| Supply Voltage |
11-40Vdc
|
Progammable LCD
Display (75 x 53mm Control Panel Window): – |
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| Actual Heading |
° MAG or TRUE
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| Power Consumption |
12v
|
24v
|
Set Course |
° MAG or TRUE
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| Off |
4.2W
|
4.3W
|
Rudder Angle |
Bar Graph and 2 Digit
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| Standby |
4.6W
|
4.8W
|
Rudder Control |
Setting Value (1 – 9)
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| On |
5.1W
|
5.3W
|
Yaw Control |
Setting Value (1 – 9)
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| Illumination (max) |
+1.5W
|
+1.5W
|
Counter Control |
Setting value (1 – 9)
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| XTE Track Mode |
XTE Amount (nM)
XTE Direction
(Left/Right)
Data Type Update
(every 18secs)
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| Solenoid Switch Ratings: – |
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Voltage
|
11-40Vdc
|
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Current
|
5A
(max) |
HTS Track Mode |
Heading to Waypoint
(xxx.x°)
ErrorValue
(xxx° Left/Right)
Data Type Update
(every 18sec)
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| Switchline Polarity |
Installation
Selectable (Common +ve or Common -ve) |
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| Switch Type |
Solid
State |
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| Autopilot Operating Mode Displays | |||||||||
| Operator Controls: – |
Standby – Manual Steering | ||||||||
| Yaw |
Select keypad + illum
|
Autopilot Steering (On) | |||||||
|
Rudder
|
Select keypad + illum
|
Auto Track Steering
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| 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
|
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| Autotrim |
Keypad Off/Set
|
Watch Alarm
|
Program. 3-12 min
|
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Illumination
|
Variable Red
LED Backlight |
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Screen Display Alarm Messages:-
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| Custom Turns:- |
33 in total including:-
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| 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
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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.): – |
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| NMEA 0180 |
CTE
|
Mechanical | |||||||
| NMEA 0183 |
XX APA, XX APB
XX RMB, XX XTE |
Width |
192mm
|
270mm
|
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| Height |
120mm
|
175mm
|
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| Depth – (C/U behind bezel) |
48.4mm
|
66mm
|
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Heading to Steer Data (from GPS/Plotter):-
|
Bezel Depth |
14mm
|
N/A
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| NMEA 0183 |
XX HTC, XX HSC,
XX APB
|
Compass Safe Distance |
0.4m
|
0.4m
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| Weight |
1.2Kg
|
1.5Kg
|
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| Heading Output to Radars / Track Plotters etc. |
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|
1Hz
|
11Hz
|
22Hz
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| NMEA 0183 Sentence types @ 1, 11 & 22Hz |
MAG
|
APHDG
APHCC
HCHDG
HCHCC
|
HCHDG
HCHDM
|
HCHDM
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GYRO
|
HEHDT AGHDT
|
HEHDT
|
HEHDT
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| Furuno Format |
Selectable 0.1° or 0.166° resolution |
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| Selectable 5Vpp or 11Vpp output |
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| Selectable 5Hz or 40Hz update rate |
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