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Designed and developed by Navitron Systems Limited for professional use on Magnetic and/or Gyro based commercial vessels of all types – including High Speed Craft. The Navitron NT888G MK2 is a speed adaptive Autopilot which constantly monitors and self-tunes to provide optimum steering performance.
Powerfully equipped and technologically advanced, the NT888G MK2 is fully MED Module B Type Approved incorporating BAMS compliance with IMO Resolution MSC.302(87) for conventional hull and High Speed Craft (HSC). Further approvals include Russian Maritime Register of Shipping (RMRS) and China Classification Society (CCS).
A fully Type Approved installation programmable Adaptive Autopilot for Mag and/or Gyro vessels of all types. The NT888G MK2 Autopilot offers traditional Navitron reliability reinforced by Adaptive control technology.
Comprehensively custom programmable via a fully equipped but simple to use installation “Set Up” menu, the NT888G MK2 Adaptive Autopilot may be set to work across the widest range of vessels to provide optimum steering performance whether operating on a conventional cargo vessel or tanker versus a high speed passenger ferry underway at 50 knots.
This is made possible by an adaptive self tuning algorithm which is aided by external speed and draft inputs.
| Parameter | Specification |
| Operating Voltage | 11V DC to 40V DC (Single main supply with power monitor) |
| Power Consumption | Approx. 3W (0.25A @ 12V DC / 0.12A @ 24V DC) |
| Drive Outputs | Solid-state dual polarity outputs (+/- 11–40V DC) or potential-free dry contact relays |
| Solenoid Drive Current | Max. 5A continuous output |
| Proportional Drive Output | Optional isolated proportional drive interface card (4–20mA, 0–10V, or PWM) |
| Display Panel | High-contrast graphics LCD with variable red backlighting (Day/Night modes) |
| Interface Type | Supported Protocol / Signal |
| Gyrocompass Input | NMEA 0183 ($HEHDT, $THS, $HCHDT, $INHDT) via RS-422 interface |
| Magnetic Compass Input | Direct coil sensor (NT920HSC) or NMEA 0183 fluxgate sensor |
| Speed Log Input | NMEA 0183 ($VHW, $VBW, $VTG) or 200 pulses/NM Speed Log |
| ECDIS / Track Navigation | NMEA 0183 ($APB, $XTE, $BWC) for multi-waypoint ECDIS track steering |
| Heading & Data Output | NMEA 0183 ($HDT, $HDM, $RSA) for VDR, repeaters, and RADAR |
| BAMS Interface | IMO Res. MSC.302(87) compliant alarm interface |
| Parameter | Specification |
| Steering Control Modes | AUTO (Heading Hold), STBY (Manual Helm), TRACK (ECDIS Route Steering), DODGE |
| Adaptive Control | Self-tuning algorithm continuously adapts to vessel loading, speed, and sea state |
| Rate of Turn (ROT) Control | Configurable ROT limits ($1^\circ/\text{min}$ to $300^\circ/\text{min}$) for smooth cornering |
| Radius Control | Turn radius steering mode for pre-set arc maneuvers |
| Rudder Limit Range | Adjustable software limits ($\pm 5^\circ$ to $\pm 45^\circ$) |
| Off-Course Alarm | Visual and audible alerts with configurable threshold ($1^\circ$ to $30^\circ$) |
| Parameter | Specification |
| Operating Temperature | $-15^\circ\text{C}$ to $+55^\circ\text{C}$ |
| Storage Temperature | $-25^\circ\text{C}$ to $+70^\circ\text{C}$ |
| Protection Rating | IP67 (Front panel when flush console mounted) |
| Enclosure Construction | Heavy-duty anodized aluminum housing with tactile control buttons |
| Mounting Options | Flush console panel mount or bracket/trunnion mount |
| Dimensions (Control Unit) | $240\text{ mm (W)} \times 120\text{ mm (H)} \times 55\text{ mm (D)}$ |
Manufacturer Part Number: NT888G-MK2
Country of Origin: United Kingdom (UK)
Standards Compliance: IMO Res. A.342(IX), MSC.64(67) Annex 3, ISO 11674, ISO 16329, IEC 60945, IEC 61162
Type Approvals: Wheelmarked (MED Module B), RMRS, ABS, DNV
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