Some
notes on this discussion:
1. I
have had the opportunity to spend some time in a US Navy submarine damage
control simulator as part of a team that took on a series of leaks. With
a team, a lot more room than found in a PSUB (even a large one), proper damage
control response resources, and cold water under pressure, we were hard
pressed to stop a variety leaks that would be encountered aboard a
submarine. It was very stressful but someplace in the back of your mind
you knew that it wasn’t real, there was a hot shower waiting for you, and
there would definitely be at least a cold beer at the end of the day.
Aboard a typical PSUB, there has been little if any previous damage control
training, there are few resources available to combat a leak, reserve buoyancy
is at a premium, you probably don’t have someone to assist in combating the
casualty, and it is VERY cramped.
2. The
actual pressure behind a ¼” leak at 10,000 fsw:
1 fsw = 0.445 psi therefore
10,000 fsw equals 4450 psi.
The area of a circle (A) equals π times the
radius squared, where the radius in this case equals 0.125” resulting in an
area of 0.0491 in.2
Therefore the pressure through our ¼” tube
at 10,000 fsw equals (4450 x 0.0491) ~219 psi.
3. A
hatch that is leaking in shallow water may not stop leaking with an increase
in depth as the inflow of water disrupts the seating
pressure.
Later,
Jay
Respectfully,
Jay
K. Jeffries
Andros
Is., Bahamas
As
scarce as the truth is, the supply has always been in excess of the
demand.
-Josh
Billings