In a SAR operation, what is the On-Scene Coordinator (OSC) and who typically fills the role?

A. The MRCC duty officer who coordinates from shore via satellite

B. The vessel or aircraft at the scene designated to coordinate search and rescue activities — typically the first SAR asset to arrive, or a suitable vessel directed by the MRCC

C. The skipper of the distressed vessel who directs all rescue efforts

D. The largest vessel at the scene always becomes the OSC automatically

A. To send a digitally coded distress alert containing the vessel's MMSI and position automatically to all DSC-equipped stations and the Coastguard

B. To broadcast weather forecasts to other vessels

C. To make telephone calls from the vessel to shore

D. To operate the radar system remotely

A. A GPS waypoint identifier used in coastal navigation

B. Maritime Mobile Service Identity — a unique 9-digit number identifying the vessel; without it a DSC distress alert cannot identify the vessel to rescuers

C. A VHF channel number allocated by Ofcom for distress use only

D. A vessel survey certificate number required by the MCA