Garmin Course Computer Unit - Reactor 40 f/Volvo-Penta [010-11052-68] Hunting & Fishing | Reels These vents help prevent water

These vents help prevent water from entering the fuel tank

GPSmap 12X2 Touch

Box Dimensions: 7"H x 7"W x 15"L WT: 6

The SmartShunt is a good alternative for a BMV battery monitor

Mississippi River adn Lower Miss

Garmin Course Computer Unit - Reactor 40 f/Volvo-Penta [010-11052-68] Hunting & Fishing | Reels These vents help prevent waterCourse Computer Unit Reactor 40 for Volvo Penta Garmin's CCU is the brain of the Reactor 40 autopilot system, containing sensory equipment used to determine heading and rate of turn. Connect the CCU to the NMEA 2000 network to communicate with your GHC 20 and an optional NMEA 2000 compatible devices. WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm.