Which of the following acronyms refers to a communications system that does not include data in its emission.

Correct Answer: Option C — SART

A Search and Rescue Transponder (SART) is a radar-based locating device. It emits a series of dots on an X-band radar display when triggered by a ship's radar, rather than transmitting data via digital radio protocols like NAVTEX, SITOR, or NBDP. It is strictly a homing and locating aid.