This is the complete JRC JLR-7700MK2 GPS Navigator kit, a high-precision maritime navigation system designed for professional use. The package includes the powerful DGPS (Differential GPS) sensor for exceptional positional accuracy, essential for demanding marine operations.
Product Description & Key Features:
Core Unit: JRC JLR-7700MK2 GPS Navigator
- High-Performance Receiver:Â Provides reliable, continuous GPS positioning for safe and efficient maritime navigation.
- User-Friendly Interface:Â Features a clear, intuitive display for easy operation and quick access to critical navigation data (latitude/longitude, speed, course, time to destination, etc.).
- Versatile Navigation:Â Supports waypoint plotting, route planning, and track storage, making it ideal for fishing, commercial shipping, and recreational boating.
- NMEA 0183 Output:Â Seamlessly integrates with other onboard equipment such as radar, chart plotters, AIS, and autopilots for a comprehensive bridge system.
- Rugged Marine Construction:Â Built to withstand the harsh marine environment with robust, waterproof (or highly water-resistant) design
Critical Component: NNN-4331 DGPS Sensor with Antenna (KE79529 #3)
- Enhanced DGPS Accuracy:Â This sensor is the key to the system’s superior performance. It receives Differential GPS correction signals, typically from maritime beacon networks or satellite-based augmentation systems (SBAS), to correct errors in standard GPS signals.
- Centimeter-Level Precision: Dramatically improves positional accuracy from ~10 meters (standard GPS) to sub-meter or even centimeter-level precision. This is crucial for:
- Precise piloting in narrow channels, harbors, and congested waterways.
- Accurate station-keeping for fishing, surveying, or research.
- Safer navigation near hazards, offshore structures, and in poor visibility.
- Integrated Antenna (KE79529 #3):Â The system includes the specific, high-sensitivity antenna (model KE79529, identifier #3) required for optimal reception of both GPS and DGPS correction signals. It is designed for permanent, stable mounting on the vessel.
Typical Applications:
- Commercial Fishing Vessels
- Workboats & Pilot Boats
- Search & Rescue (SAR) Craft
- Survey & Research Vessels
- Luxury Yachts & Superyachts requiring backup/primary precision nav
- Any vessel requiring reliable, high-accuracy positioning.



















