Red sea isn't that cold though, likely something like 23 Celsius, this was winter so it's slightly colder. In the summer I've dived the red sea with no wet suit

Red sea isn't that cold though, likely something like 23 Celsius, this was winter so it's slightly colder. In the summer I've dived the red sea with no wet suit and it's certainly not a problem to swim for some time. I've also done a lot of diving and I'm not sure if I'd try or not. Dive boats are not that large and if it's a liveaboard you'll get very familiar with the boat pretty quick. There's typically a main cabin area/level, stairs to the cabins, and that's about it. If it's that or death then I might take my chances. Assuming you are in an air pocket then you have time to regroup, plan, and also take a deep breath. Dark is certainly a problem and not having a mask does make for a complication. It also depends where I am specifically on the boat. If you're talking about swimming out immediately when you wake up in the middle of the night and find yourself under water - yeah, that's a tough one. It's basically what these guys did though, they got to this air pocket. From the sound of it when they woke up the boat was not completely flooded either. Looking at the video I agree this doesn't look like a great place to swim out of. You can likely tell if you're on the surface or not. You're going to feel the swell, waves etc. One takeaway is to have an emergency plan ready in advance. If you're super paranoid you can also have your mask with you. Some divers carry an extra compressed air bottle which would be handy too. Flashlight?