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Hi Myles.
The STANDARD RECREATIONAL dive tables are printed
on a simple plastic card and I bet you could find them easily on e bay, also at
any dive shop.
They are not specific to any one diver or location.
I specified standard recreational, because there are decompression and
saturation dive tables too.
Standard recreational scuba dive tables do NOT
account for deco level stops. The recreational dive tables 3 minute safety hang
at 15 feet is a precaution
but not really a deco hang. If you follow the
standard Rec diving tables you do not have to decompress on the way up.
Depending on how deep and how
long you were just down for your no decompression
dive, you may have to offgas some before you do another dive, but you wouldn't
have to deco on the way
up on your first dive. That is why it is called
standard recreational NO DECOMPRESSION diving. When you do multiple dives on the
same day, it gets a bit
more complicated and you have to allow time for
your body to offgas nitrogen to a certain level before you dive again and it
depends on how deep and how long
you plan to go for your next dive as to how long
you have to remain topside to offgas body nitrogen before diving
again.
Although salt water is more buoyant than fresh, the
atmosphere increasing times 1 roughly every ten
meters (33 ft) should stay the same.
With the pressure problems bothering your head that
you mentioned, you might want to take an inexpensive dive course and see if you
could take the
pressure before you invested the time and expense
to build an ambient sub only to find it hurts you to use it. If you were going
to be operating an ambient
sub you should be a certified diver anyway because
as you now see both the diver and the ambient sub operator are operating under
increased pressure
so you see how having diving knowledge and skills
can help in operating the ambient sub. Have you ever had your eardrums
perforated? Do you have frequent
sinus problems? You might get checked out by a
doctor to see what might be causing the problems and maybe it can be fixed or at
least you would know
what was causing it and go forward with a 1 atm
design instead of an ambient.
Bill.
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