The Marine Data MD69BR is a high-precision trunnion-mounted NMEA digital heading repeater manufactured in the United Kingdom by Marine Data Systems. Housed in a rugged dual-axis or tilt-adjustable trunnion arm bracket, the MD69BR allows versatile desk, overhead, shelf, or bulkhead mounting on commercial, naval, and merchant vessel bridges.

The repeater features a high-visibility dual-scale concentric compass dial (360° outer scale paired with a high-resolution 10° expanded inner scale) providing 0.1° heading resolution. Built into a weatherproof marine-grade alloy housing, the MD69BR decodes standard NMEA 0183 heading sentences ($HDT, $HDG, $HDM, $THS) from gyrocompasses, satellite compasses, and magnetic compass systems. Variable red LED backlighting ensures night-vision compliance during nocturnal watchkeeping on the wheelhouse or chart table.

Key Features:
• Adjustable Trunnion Bracket: Heavy-duty mounting arm enables tilt angle adjustment for tabletop, overhead ceiling, or wall console mounting.
• High-Accuracy Dual-Scale Display: Concentric dual-card layout (360° outer / 10° expanded inner) for precision heading readings and bearing alignment.
• Universal NMEA 0183 Interfacing: Automatically senses and decodes serial NMEA 0183 data ($HDT, $HDG, $HDM, $THS) across multiple standard baud rates.
• Variable Red Night Illumination: Fully dimmable red LED dial lighting controlled locally via rotary knob or remotely via NMEA commands.
• Marine Class Weatherproof Build: Corrosion-resistant aluminum alloy enclosure with IP66 protection engineered to endure severe marine vibration and climate extremes.