You are approaching a sea buoy which emits a racon signal. This signal is most frequently triggered by which type of radar?

Correct Answer: Option B — 3 cm

Racons are radar beacons that provide both range and bearing. Most standard marine racons are designed to respond specifically to the 3 cm (X-band) radar frequency. While some modern units are dual-band, the 3 cm band remains the primary frequency for triggering these navigational aids in most maritime environments.