several of carols many work-up exercises for the crew had involved embarking helicopters when underway so the flight deck crew , under chalky ( i knew that i had agreed to let him come along for some obscure reason ) performed to perfection , and the merlin gently set down slap bang on its spot , and after chalkys crew had gone in and chocked and lashed the merlin firmly to the deck the commodore in charge of ctf 150 exited .