18:12 This area is close to the flooded passage near the start of the level. That breathing sound in the background is the diver you couldn’t be bothered to kill at 2:46. 22:12 You have all the pieces of the puzzle - you’ve just not yet put them together in the right order. Once you know, 13:24 becomes a bit of a facepalm moment (but unless you want a hint, don’t click on that timestamp until you’ve solved it yourself).

That why I hate the harpoon gun you have to reload after 4 shots especially that scuba diver at the start