drrich2
Contributor
True. I think this is one of those issues that needs to be came at from both sides, which is a strength for forum discussions. I agree, if you get a diver who's on vacation from dive mastering and can stay down 1 1/2 hours on an 80-cf tank, on a 2-tank morning boat trip that gets ridiculous when the crew need to get back to prep. for the afternoon trip.During the briefing typically. If being able to dive to the maximum extent of your air or NDL is important, I suggest you ask when you book. Most charter boats do not allow that, at least not here in Florida. There needs to be some sort of limit for those diving large singles, doubles, or with crazy good air consumption. Without that the boat has no hope of staying on any sort of schedule.
On the other hand, I recall from another thread a poster citing a Sandals Resort dive op. limiting divers to 45 minutes, and I get the impression many divers consider that too short. I doubt any of us would be satisfied with a 30 minute limit on shallow reef dives, and thankfully I've not seen that happen.
My point is, the recreational diving public has some sort of ill-defined unconscious assumption about how long they ought to be able to dive, gas reserve and NDL depending, at common destinations with benign conditions. My personal impression is that length is 50 minutes to an hour (when it's 50 minutes, some people like to get in first and out last to add some dive time).
If a dive op. restricts recreational dives in benign conditions to a 45 minute maximum duration, and they won't overtly warn people in advance of booking with them that this will be the case, they're going to get negative criticism about it when those divers post trip reports. People invest money and time in these trips, and when their dive time is arbitrarily (in their view) cut short without advance warning, it rubs people the wrong way.
So I agree, dive times have to be limited as a practical matter. But 45 minutes? I'd want to know that in advance.