I have just finished reading Sheck Exley's - 'Caverns Measureless to Man'. I am curious as to whether others have tried to use the very cheap (around US$30) Casio watches that he swears by in the book. For those that have not actually read it, he used these cheap water resistant (note: not waterproof) watches down to amazing depths - 600/700/800 ft - with no problems at all. According to him they still functioned when actual diving watches would simply have imploded from the pressure.
I had one such watch years ago that really did say 'Water Resistant to 200 meters' ! At the time I remember thinking - 'Yeah sure......and who is going to use it that deep?' So I was fairly amazed to read the comments in the book. I do remember that the one I had kept really good time - it strayed about a second and a half over a year. Sheck used to take several down with him and left them with stage tanks as backup - as well as all the way down. He never had one fail.
I had one such watch years ago that really did say 'Water Resistant to 200 meters' ! At the time I remember thinking - 'Yeah sure......and who is going to use it that deep?' So I was fairly amazed to read the comments in the book. I do remember that the one I had kept really good time - it strayed about a second and a half over a year. Sheck used to take several down with him and left them with stage tanks as backup - as well as all the way down. He never had one fail.