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The Marine Data MD67HR is a compact, IP66-rated weatherproof NMEA dial compass heading repeater display manufactured in the United Kingdom by Marine Data Systems. Engineered specifically for space-constrained wheelhouse consoles, steering positions, and outdoor bridge wings on commercial, naval, and workboat vessels, the MD67HR delivers real-time heading indications driven by shipboard gyrocompasses, satellite compasses, or magnetic heading sensors.
The unit features a high-visibility 118mm (approx. 4.6-inch) dual-scale concentric compass dial (360° outer scale combined with an expanded inner scale) offering 0.1° heading resolution. Housed in a durable powder-coated aluminum enclosure, the MD67HR automatically decodes standard NMEA 0183 serial heading data ($HDT, $HDG, $HDM, $THS). Variable red LED dial illumination ensures glare-free night-watch operations without impairing nocturnal vision.
Key Features:
• Compact IP66 Weatherproof Design: Small-footprint sealed enclosure suitable for exposed deck stations, flybridges, and space-limited wheelhouse consoles.
• 118mm Dual-Scale High-Resolution Dial: Clear dual-concentric dial layout providing accurate visual heading indication with 0.1° digital resolution.
• Universal NMEA 0183 Compatibility: Automatically senses and decodes serial NMEA 0183 heading data ($HDT, $HDG, $HDM, $THS) across standard baud rates.
• Variable Red Night Illumination: Fully dimmable red LED dial backlighting controlled via front-panel rotary control or remote NMEA serial commands.
• Flexible Installation Formats: Supports flush panel cutout mounting or bracket mounting using an optional mounting trunnion.
| Attribute | Specification Details |
| Manufacturer | Marine Data Systems Ltd. |
| Model / Part Number | MD67HR (P/N: MD67HR) |
| Item Type | Compact Weatherproof Dial Compass Heading Repeater Display |
| Display Type | 118 mm dual-scale concentric compass dial (360° outer / 10° expanded inner) |
| Heading Resolution | 0.1° resolution |
| Data Inputs | NMEA 0183 (IEC 61162-1) serial input ($HDT,$HDG, $HDM,$THS) |
| Baud Rate | 4800 / 9600 / 19200 / 38400 baud auto-sensing |
| Illumination | Variable red LED backlighting (front rotary knob / NMEA remote dimming) |
| Operating Power Supply | 24V DC nominal (18V to 32V DC range) |
| Power Consumption | Approx. 4W max (at maximum backlight intensity) |
| Mounting Format | Flush panel mount / Trunnion bracket mount option |
| Enclosure Material | Marine-grade aluminum alloy with anti-corrosive powder coat finish |
| Dimensions | Approx. 144 mm (W) x 144 mm (H) x 96 mm (D) |
| Weight | Approx. 1.5 kg (3.30 lbs) |
| Operating Temperature | -25°C to +70°C (-13°F to +158°F) |
| Ingress Protection | IP66 (Weatherproof for exposed bridge wing and console installation) |
| Compliance & Standards | IEC 60945 (Marine EMC & Environmental), ISO 8728, ISO 16328, CE, Wheelmark (MED) |
| Application | Secondary steering position display, flybridge heading repeater, emergency helm indicator, and workboat bridge display |
| Country of Origin | United Kingdom |
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