The Marine Data MD69BR/BO is a standalone NMEA digital compass bearing repeater bowl manufactured by Marine Data Systems in the United Kingdom. Supplied as a “Bowl Only” (BO) unit without external brackets or pedestals, the MD69BR/BO is designed for direct integration into existing marine gimbal rings, pelorus stands, azimuth bearing devices, and custom bridge console cutouts.

The repeater bowl incorporates 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. Housed in a waterproof, marine-grade aluminum alloy enclosure, the MD69BR/BO processes standard NMEA 0183 serial heading data ($HDT, $HDG, $HDM, $THS) from shipboard gyrocompasses, satellite compasses, and magnetic sensors. Fully dimmable red LED backlighting ensures night-vision compliance during nocturnal watchkeeping on open bridge wings.

Key Features:
• Standalone Bowl Configuration: Supplied as “Bowl Only” for mounting in third-party or existing Marine Data gimbal rings, pelorus stands, and console cutouts.
• Dual-Scale High-Resolution Display: Concentric dual-card design featuring 360° outer and 10° expanded inner scales for accurate visual bearing observations.
• Universal NMEA 0183 Interfacing: Decodes standard NMEA 0183 serial heading data ($HDT, $HDG, $HDM, $THS) with automatic baud rate detection.
• Adjustable Night Illumination: Variable red LED dial lighting controlled locally or via remote NMEA serial commands for night-watch operation.
• Rugged Weatherproof Enclosure: IP67-sealed marine-grade aluminum alloy housing built to withstand exposed bridge wing environments and severe sea states.