Veratron NavBox Electronic Control Unit [A2C59501979]NavBox Electronic Control Unit The AcquaLink NavBox is the core of the AcquaLink VDO Marine system. It acts as a CPU and signal interface. The NavBox provides a wide range of digital and analog input possibilities. It supports up to four electronic engines (J1939 or NMEA 2000) or one analog engine. It also features two VDO Marine Sumlog paddle wheel sensor and one analog VDO Marine Windsensor connections, so legacy VDO Marine products can be used and