40 minutes missing in a current is still way too long to search without calling CG. Especially since you don't know at that point whether they've been missing for 40min or 80min or longer.
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Well, it seems like they wouldn't have needed to take much time to search the boat, or do a roll-call of the other two divers...
It's always amazed me to see other divers on boats who don't carry SMBs. Carrying my PLB on dives is a hassle, but it certainly beats risking lost at sea. The Coast Guard rescued other drifters this weekend: http://www.scubaboard.com/forums/ne...ed/509503-driftng-divers-rescued-florida.htmlLt. Harry Lehman said in the release that the divers' brightly colored flotation devices made it easier for them to be spotted.
I'm used to the NC charter approach where the DM does not supervise dives.
But they know who is in the water and when they are due back. They try to keep an eye out for where the divers are. Been on a NC boat with a "lost diver pair" The crew was looking for them before the smb popped up some distance away.
I know that on the boat I crewed on we'd be checking the run time chart as people were due back and would have "noticed" someone missing the minute they were late. We would check to see if they were under the boat or on the up line. We would start asking other divers who exited the water recently if they saw the two missing divers during their dive, especially towards the end of their dives.