Which statement correctly describes a feature of navigation data interfaces?

• A. NMEA 0183 uses binary frames for data transmission.
• B. NMEA 2000 uses CAN bus for multi-sensor data.
• C. ARINC 429/664 is an analog interface used for navigation data.
• D. NMEA 0183 is used for high-rate attitude data.

Answer: (B)

Navigation data interfaces are designed to move information between sensors and displays using standardized networks. NMEA 2000 uses the CAN bus, a robust multi-node network that lets many devices share data on a single bus. This supports a variety of sensor information—GPS, attitude, wind, depth, engine data, and more—across multiple instruments with standardized messages, so different devices can interoperate smoothly.

NMEA 0183, by contrast, transmits data as ASCII text sentences over a serial link, not binary frames, and is slower and less suited for a multi-device network. ARINC 429/664 are avionics standards that are digital and not analog interfaces (ARINC 664 is Ethernet-based); claiming they are analog isn’t accurate. NMEA 0183 also isn’t designed for high-rate attitude data, which requires the higher bandwidth offered by networks like NMEA 2000.