I have seen on a few reviews recently that you now have to swim a 400m swim to do the one time dive is this true or just for some resorts? I was at CN last aug and that was not needed. I have no issue swimming that distance at all heck it could be 1000m or more and id be fine, but I am not sure my wife can swim non stop for 400m. My wife really had a awesome time doing scuba last trip and really wants to again on our return trip, so trying to figure out if she needs to start doing some serious training so she has no problem.