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The third course day was all about safety and rescue procedures in the pool disciples (static and dynamic apnea). The theory focused on the importance of the buddy system and what happens to the body when you get a loss of motor control or black-out. To get a good understanding of these phenomena we were shown a long video with stuff going wrong.
This is what a loss of motor control (LMC), also called samba, looks like (skip to 2:03 if you’re bored by the swimming):
In the above video there is clearly no adequate safety near the diver, so at the same time it is an example how these attempts shouldn’t be done. If this diver’s LMC would have been stronger he could have hit his head on the edge of the pool and in the process he’d probably lose some of his teeth. Ouch.
You can probably imagine what a black-out looks like. Sometimes a black-out just occurs without a warning, but especially in the pool disciplines they can follow the LMC:
Generally they say a black-out is when you have a short gap in your memory (even if it just looks like a samba). Of course you want to avoid these situations altogether, but you have to know how to rescue your buddy when something like this happens to him or her.
So last Wednesdays course day was all about saving your buddy when they black-out. We practiced something called blow tap talk extensively in the static and dynamic setting. It was great fun and it’s definitely no exaggeration when I say that some of us are quite talented actors. Unfortunately I have no filmed documentation of this statement, but just trust me… 🙂
If you want to get a better picture of how to get someone out of a black-out, another great video by Adam Stern will show you how:
After we practiced the rescue procedures and Nanja was satisfied – also with our execution of the forceful advice to the blacked-out freediver that he is not allowed to freedive anymore for the day -, we did a timed static apnea and some more dynamic apnea’s.
My static attempt was a repeat of my previous personal best of 3:10 minutes. Even though I think I could have held out quite a bit longer if I had known I passed the three minute mark, I’m quite satisfied about this consolidation of my static ability. It was a relaxed and nice breath-hold where the contractions at the end didn’t bother me too much.
The evening ended with some more fine-tuning of the duck-dives and – while we filled in our logbooks – Nanja (our instructor) treated us to some bitterballs and chicken-nuggets because it was exactly two years ago that she did her world record variable weight dive, which is a record until this day!
If you read my previous post you know I was a bit concerned about my ability to equalize the middle ear when we would go deep diving in Dive4Life. As I write and now conclude this post, I already had the deep diving day yesterday and know how I fared. Even though I will have to keep you in just a little bit of suspense (at least until my next post tomorrow), I’ll leave you with a picture of the pool from the edge as a teaser: