Garmin GNA 10 Jog Level Adapter

Enhance the precision and reliability of your vessel's steering with the Garmin GNA 10 Jog Lever Adapter, a specialized interface designed specifically for Reactor 40 autopilots on displacement hull powerboats. Ideal for workboats, trawlers, and other commercial vessels where rugged simplicity matters, this adapter bridges traditional jog levers to modern Garmin autopilot systems. By integrating a jog lever, captains gain intuitive control—simply nudge left or right to fine-tune heading hold, or engage Power Steering mode for direct rudder adjustments without full autopilot engagement.

What sets the GNA 10 apart is its flexibility. It supports optional connections to a momentary button and status LED, enabling seamless toggling between heading hold and standby modes right from the helm. This setup delivers the tactile feedback serious mariners demand, all while maintaining the IPX7 waterproof rating that withstands harsh marine environments. Powered seamlessly via the NMEA 2000 network, it draws minimal power (LEN 5, 250mA at 9VDC) and operates reliably from -20°C to 75°C (-4°F to 167°F).

Key Advantages for Displacement Hull Operators

• Effortless Heading Adjustments: Press the jog lever to incrementally steer, perfect for slow-speed maneuvering in tight channels or during fishing operations.
• Power Steering Freedom: Command the rudder independently, offering manual override when autopilot isn't needed—great for docking or precise positioning.
• Customizable Status Indication: Pair with a compatible button and low-draw LED (20mA max) for clear visual cues on autopilot status, reducing guesswork at the wheel.
• Robust Build for Real-World Use: With a 2.8-meter (9-foot) cable and black housing, it's engineered for durability on deck, resisting corrosion and submersion.
• Seamless NMEA 2000 Integration: Outputs standard NMEA 2000 signals, ensuring compatibility within Garmin's ecosystem when paired with a Reactor 40 corepack and display.

Proven Compatibility with Trusted Jog Levers

Select from battle-tested jog levers that pair perfectly with the GNA 10:

• Kobelt 7170 – Known for its heavy-duty construction in commercial fleets.
• Jastram JO100 or JO300 – Reliable for precise control in demanding conditions.
• Simrad S35 – Features built-in button and LED, fully supported for plug-and-play convenience.

Note: This adapter is tailored for single-speed jog levers only; dual-speed models with separate switch sets are not compatible. For buttons, opt for DPST off-momentary (no diode required) or SPST types (diode needed), rated at 5mA max and 12V. It's exclusively for displacement hull powerboats—planing hulls or sailboats require different solutions.

Technical Specifications at a Glance

Practical Tips for Seamless Integration

Installing the GNA 10 elevates your helm setup without complexity. Mount your chosen jog lever in an accessible spot, route the 9-foot cable to the NMEA 2000 backbone, and connect optional button/LED wiring per Garmin guidelines. This configuration shines on long-haul trawlers or workboats, where consistent low-speed control prevents fatigue. Always verify your Reactor 40 setup includes a compatible Garmin display for full functionality, and remember Garmin backs this adapter with responsive support.