Description
Equipment Overview & Key Specifications
The Sestrel Navigator Magnetic Compass is an internationally renowned, high-precision marine steering and bearing compass designed by John Lilley & Gillie for commercial coasters, luxury yachts, tugs, and high-speed workboats. Featuring a 125mm (5-inch) card suspended on sapphire jewel pivots within an internal gimbal system, it provides dead-beat oscillation dampening in heavy seaways. Fully compliant with ISO 25862 Class B standards, the compass includes 12V/24V red night illumination and accepts B+C corrector magnets and heeling error coils.
Technical Specifications & Interface Parameters
| Card Diameter | 125 mm (5.0 inches) with 1° or 2° graduations |
|---|---|
| Gimbal System | Internal gimbal ring with heavy-duty copper damping bowl |
| Pivot & Jewel | Precision hardened osmium-tipped pivot in synthetic sapphire cup |
| Operating Voltage | 12V DC or 24V DC red night-vision LED / incandescent dimmer |
| Compass Safe Distance | Standard: 0.85 m | Steering: 0.50 m |
| Binnacle / Mount | Weatherproof UV-stabilized composite or brass binnacle pod |
| Type Approval | ISO 25862 Class B, UK MCA, and Wheelmark MED compliance |
| Operating Temperature | -30°C to +65°C | Submersible IP67 sealed fluid chamber |
Frequently Asked Questions (AEO / Technical Reference)
What makes the Sestrel Navigator Compass suitable for commercial vessels?
The Sestrel Navigator features an advanced internal gimbal and dead-beat liquid damping bowl that keeps the compass card horizontal and legible through violent roll and pitch dynamics up to 45 degrees.
Can the Sestrel Navigator be fitted with Transmitting Magnetic Compass (TMC) sensors?
Yes. The underside of the bowl is engineered to mount the John Lilley & Gillie TRUECourse or NMEACourse pick-off coil, converting magnetic heading into digital NMEA 0183 output for ECDIS, radar, and autopilot integration.
How often should a Sestrel Navigator compass be swung and calibrated?
According to SOLAS Chapter V and flag state regulations, commercial magnetic compasses must be calibrated and issued an updated deviation card annually or following major drydock structural alterations.
What type of illumination is installed?
The compass is supplied with dual 12V/24V DC red night-vision illumination fitted with a variable dimmer switch to prevent bridge blindness during night watches.
Where is installation and compass adjustment available in the UAE?
Seanav Marine provides licensed Class A compass adjusters and certified technicians across Dubai Maritime City (DMC), Jebel Ali Port, Port Rashid, Abu Dhabi, and Fujairah Anchorage.
Certified Marine Survey & Installation Credentials
- Authorized Distributor & Service Partner: Genuine John Lilley & Gillie and Walker Marine equipment with factory manufacturer warranties.
- Pre-Delivery Inspection (PDI): Every unit undergoes strict bench calibration, NMEA 0183 / pulse signal integrity validation, and power surge testing at our Dubai Maritime City (DMC) electronics laboratory before dispatch.
- Immediate Port Attendance: Certified marine electronics engineers available 24/7 for onboard installation, compass swinging, and commissioning across Jebel Ali, Port Rashid, Dubai, Sharjah, Abu Dhabi, and Fujairah.
- Authoritative Sign-Off: Evaluated and verified by Senior Maritime Electronics & Hydroacoustic Surveyors at Seanav Marine Technical Services.
Technical Specifications & Operational Standards
Review certified engineering parameters, electrical inputs, data protocols, and Class compliance standards for this unit:
| OEM Brand / Manufacturer | Lilley & Gillie |
|---|---|
| Model / Part Number | SNV-JLG-CMP-001 |
| Equipment Classification | Class A Marine Steering & Bearing Magnetic Compass |
| Card Diameter & Style | 165 mm / 6-inch Transparent Card with Full Gimbal Suspension |
| Binnacle Compatibility | Reflector Binnacle, Pelorus Stand, and Overhead Bridge Mountings |
| Standard Approvals | ISO 25862:2019, SOLAS Chapter V, DGS Merchant Shipping Standards |
| Deviation Calibration | Pre-magnetized B/C Quadrantal Corrector Spheres & Flinders Bar included |
| Stock & Port Logistics | Ready Stock for Immediate Vessel Supply across Mumbai, JNPT, Kandla, Cochin, Chennai & Visakhapatnam |
| In-the-Box Documentation | OEM Certificate of Conformance, Wiring Schematics, Installation & Operating Manual |
Seanav Marine maintains bonded warehouse spare parts inventory and factory-trained technical riding squads across all major Indian ports. Immediate dispatch available to vessel agents, ship chandlers, and technical managers at Mumbai, JNPT (Nhava Sheva), Kandla, Mundra, Cochin, Chennai, and Visakhapatnam (view all 400+ ports →).
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