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The Marine Data MD67RDI is an IP66-rated weatherproof analog dial Rudder Angle Indicator manufactured in the United Kingdom by Marine Data Systems Ltd. Derived from the wheelhouse-mounted MD77RDI, the MD67RDI is housed in a sealed, heavy-duty marinised aluminum enclosure engineered specifically for exposed bridge wings, open steering positions, flybridges, and harsh weather deck stations.
Featuring a clear 118 mm diameter analog dial graduated in 1° increments up to 45° Port and 45° Starboard, the unit decodes standard digital RS422 NMEA 0183 Rudder Sensor Angle ($RSA) sentences from compatible transmitters such as the Marine Data MD61. It includes front-panel dimmer controls for background and pointer illumination alongside remote dimmer compatibility, automatic signal-loss alert indication, and auto-recovery without requiring a manual reset.
Key Features:
• IP66 Weatherproof Enclosure: Fully sealed marinised aluminum housing built to withstand direct spray, rain, and harsh marine exposure on open bridge wings.
• Clear 118 mm Analog Dial: High-contrast dial graduated in 1° increments across a 45° Port to 45° Starboard scale with ±0.5° accuracy and a 40°/sec follow-up rate.
• Local & Remote Illumination Dimming: Adjustable white dial and pointer backlighting controlled via front-panel touch controls or an external remote dimmer (MD01/PMD).
• Automatic Signal-Loss & Recovery Alert: Drives the pointer to a vertical upward position with a flashing red LED alert upon loss of valid $RSA data, and automatically resumes operation once valid data returns without a reset.
• Flexible Bulkhead or Panel Mounting: Supplied with a bulkhead mounting bracket kit (or flush panel mounting option), with dual-indicator support for twin-rudder vessels.
| Attribute | Specification Details |
| Manufacturer | Marine Data Systems Ltd. |
| Model / Part Number | MD67RDI (SKU: F067202) |
| Item Type | Weatherproof Analog Dial Rudder Angle Indicator |
| Display Type | 118 mm diameter analog dial with backlit white illumination |
| Scale Range & Graduation | 45° Port to 45° Starboard (0–40°/45° full-scale deflection), graduated in 1° increments |
| Performance | ±0.5° accuracy; 40°/sec follow-up rate; 30,000 hours MTBF |
| Data Inputs | Digital RS422 NMEA 0183 (IEC 61162-1) at 4800 baud ($–RSA sentence) |
| Data Outputs | Optional NMEA 0183 ($RSA) output for daisy-chaining repeater displays |
| Illumination & Dimming | Backlit white illumination with front dimmer control & remote dimmer support (0–24V DC) |
| Error Indication | Loss of valid data: pointer assumes vertical upward position + flashing red LED alert; auto-recovery without reset |
| Operating Power Supply | 24V to 28V DC (10W max) |
| Connections | Sealed gland entry with multi-core screened data/power cable |
| Mounting Format | Bulkhead mount (bracket kit supplied) or Panel flush mount |
| Enclosure Material | Marinised aluminum alloy enclosure with RAL9005 Jet Black fine-texture powder coat finish |
| Dimensions | Approx. 166 mm (W) x 166 mm (H) x 110 mm (D) (including weatherproof rear housing) |
| Weight | Approx. 1.8 kg (3.97 lbs) |
| Compass Safe Distance | 100 cm (Magnetic Permeability: Category ‘A’) |
| Operating Temperature | -25°C to +70°C (-13°F to +158°F) |
| Ingress Protection | IP66 (Fully weatherproof for exposed bridge wing and open-deck stations) |
| Compliance & Standards | IEC 60945, IEC 61162-1, IEC 62288, ISO 20673, IMO Res. A694(17), A1021(26), MSC191(79), RoHS compliant, DNV GL Wheelmark Approved (as part of Marine Data RDI System) |
| Application | Exposed bridge wing rudder angle indicator, flybridge helm display, and open-deck steering repeater; supports dual-unit setups for twin-rudder vessels |
| Country of Origin | United Kingdom |
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