Swimming
I remember having to do a swimming test during IOT. Then for many years nothing, but recently they've got all keen again and we have to do it annually although they were trying to get us to do it every dinghy drill (6 monthly).
Its 3 lengths then 3(?) mins treading water then some buddy buddy survival towing and lifting out of the pool.
So what's it for? Well we had a big push to get it binned. After all, what good will it be in the middle of the North Sea? Apparently its so that you can swim to the multi seat dinghy that's dropped nearby. The mad thing is they try to get you to do a recognisable stroke and sometimes it has to be on your front - have they evr tried tried swimming front crawl in a mae west!