The Breakwater can actually be a fairly treacherous place when the swell gets high especially with a long interval. Many people think "Oh, it's only the Breakwater, it's the bunny hill". Yeah that's true when swell is low with knee highs, but get waist or chest high waves and it really changes. Some of that is due to the long slope of the beach and also how some wave energy is funneled in by the breakwall. The speed in which the water comes in and pulls back out can be deceiving and take many people right off their feet even when it doesn't look that bad from the parking lot.
Putting fins on on the beach and trying and walk through it is even harder. There are ways to deal with getting through surf like this for those that like to test their surf entrie skills. Me, I prefer to stay on shore now and watch.
Mask on with mask strap tight, reg in mouth, and fins in hand with a tight grip, walk out and stay low with a fairly wide stance, when waves come in stop and plant firmly and let wave blast by, as wave goes by continue moving in, when waist high get fins on as rapidly as possible, dive in seaward and kick like hell!!. If you have to use your arms to swim along with using fins so be it, the main objective is to get through the surf and out. If you fail and it doesn't happen then it obviously is too big and you failed, so now you know your limit.
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But to take beginning divers out in those conditions like in the video is silly and just wrong.
That divemaster should have gotten the diver back to the beach to regroup and try it again from the beginning not try and drag them out further. Looking at the skill level of those divers they should have never attempted that dive.
Trying to get in with fins on in conditions like that doesn't work. If you get your feet taken out from under you it's too hard to get back up. At least if you are running in without fins on right away and get pounded or rolled you can stand up and get out.
The worst that's going to happen is if you lose your grip on your fins you might lose one, but then if you are attempting to go diving in those conditions you should be prepared for that.
Sounds like you had fun anyway Mike, and had an excellent training session in large wave management.