I've put the house rules that I use with my regular gaming group up on the blog, covering torpedoes, wreckage and aircraft https://grahamsgaming.blogspot.com/2019/06/cruel-seas-house-rules.html
(https://live.staticflickr.com/65535/47977286132_c462f3e28d.jpg) (https://flic.kr/p/2g6A8Eu) (https://flic.kr/p/2g6A8Eu)
Those are cool
Good stuff