You are the officer in charge of a navigational watch, what signal would indicate your 3 cm radar has interrogated a SART unit?

Correct Answer: Option A — a line of consecutive dots on the radar screen indicating the bearing of the unit

Per GMDSS and radar operational principles, a SART interrogated by a ship's 3 cm (X-band) radar displays on the PPI as a distinctive line of 12 equally spaced dots indicating the unit's exact bearing.