Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to call mayday from a marine vessel [title] Listen to the radio frequency. [step] If it is clear that the coast guard or other sea rescue agency has not responded after a single repetition and a two-minute wait, you must seek to contact the coast guard or other sea rescue agency on behalf of the distressed vessel. [title] Say : [step] Mayday relay, mayday relay, mayday relay.

Ending1: This is the [" your vessel and callsign "]. The following distress call was received from [" distressed vessel's name "]. Ending2: [title] Leave a message with the main operator if contact is confirmed. [step] If the channel where the relay is located is unavailable, you can write or type a message. Ending3: [title] Identify the port at which you want to reserve the services. [step] If you are calling the coast guard, tell them that you want to reserve the services of a marine rescue agency. Ending4: [title] To end the call, remove the flag. [step] If the line is said to be disconnected, wait for the coast guard or else disconnect it for the time being.

Answer format: ending1/ending2/ending3/ending4