Re: [PSUBS-MAILIST]-pressure test/vacuum

[AndrePevestorf@aol.com]

Well, but if you dive in lets say mercury then you have a .16 times higher ???..( Damn!! I´m nothing without my books and tables...grrr) 
Than you will have a quite higher pressure when in 33 feed deep...

THIS IS STUPID !!! Nobody will ever dive in a mercury lake...

But consider the principle... If you have a lot of sand for free and can rent a digger and dig a hole 33 feed deep put the sub in and fill it with sand the pressure on the sub could be the same as in 100 or more feet water deep... (I´m not a civil ingineer but the have formulars to calculate the "earth-pressure")
It sounds crazy but it will works.  You can also use concrete but than it is crazy indeed !!!  :-))

With this method ( I will never advise this honestly ) the statement: "Of course I have build my sub for searching for treasures" gets a total new interpretation .... particulary if you forgot where you sub "lies"...

Search for a lake or dig a hole and............fill it with water .... 

A.