Which statement best describes the function of a gateway device on an NMEA 2000 system?

• A. It powers all connected devices.
• B. It stores historical PGN logs locally.
• C. It filters out all proprietary PGNs.
• D. It translates and forwards data between NMEA 2000 and other networks, enabling cross-network data sharing.

Answer: (D)

A gateway on an NMEA 2000 system serves as a bridge that makes data usable across different networks. It listens to the NMEA 2000 CAN bus, translates the PGN data into the format used by another network (such as NMEA 0183 or an Ethernet-based system), and forwards it in the opposite direction as well. This translation and forwarding enable cross-network data sharing, so information like GPS positions or engine data can be used by devices that speak a different protocol. It doesn’t power devices, and while some gateways may offer logging or filtering as features, their primary function is interoperability between networks.