I'd like to second Eric Berg's statement about the life preserver pants. I was also trained to do this and it works remarkably well. I was told that the purpose of the bell bottom pants wasn't to hold more air, but so that your pants came off easily (you don't want your skinny jeans jammed up on your ankles).
2021-04-13 23:49:11 +0000 UTC
Actually I believe that at 56 min that IS James II. He was Lord High Admiral of the British fleet at the 2nd Anglo Dutch war wduring the reign of his brother Charles II and was one of its more successful commanders.
Colonel Cheng
2021-04-11 16:51:39 +0000 UTC
A few words about sub escape: first, at 160ft aka roughly 60m the pressure is not enough to squish you, or do any serious mechanical harm to human body. Now, the air in your bloodstream decompressing IS the bends (or to be more formal decompression sickness), although the big problem is nitrogen not oxygen. Now, wether it even is a problem depends of circumstances. If your pressure section wasn't breached, not really, as you will not have enough gas dissolved in your bloodstream under pressure. In such situation, having a breathing apparatus on your way up will actualy worsen your problem, as you will breath in under pressure, but again, not enough to harm most people if they were going straight up and not taking a plane right after. Now, if pressure section was breached, but you survived inside air pocket, it would be much worse, as air inside such pocketwould be under ambient environmental pressure on depth you're on, and thus you will breath in a lot before even getting out. Now this means that to survive you will need to ascend slowly, preferebly with decompression stops, just like any long time deep scuba dive, otherwise your only hope is that up there there is someone waiting to give you oxygen (and thus cut any extra nitrogen intake) and transport you to a decompression chamber.
2021-04-10 10:42:13 +0000 UTC
Yes we operate in very cold water and worm water. No need to bother in near freezing salt water, you’re already dead
Erik Berg
2021-04-09 23:17:12 +0000 UTC
The USN requires all personnel to be able to make a life preserver out of our pants & float in the pool for two hours. It actually works very well and takes much less energy than treading water. We would tie our shoes together & drape them around our necks. Coral reefs will shred your bare feet
Erik Berg
2021-04-09 23:14:46 +0000 UTC
Q&A Pure theory: even the best radar and fire control system is just making sure you get all the hits the CEP of your artillery permits. Battles will be shorter. If the enemies systems are as good as yours, he should try to kill or jam your radar systems (actively or passively) or make sure his own CEP is much better and then close to a range where you cannot dodge his fire, or get more lethal shells. Is my reasoning +/- ok? Probably not applicable for WW2 because allied radar technology was way ahead their opponents' capabilities. Seems also to indicate that arms races are inevitable and finally won by advances in technology. Sorry, I am getting philosphical.