My Confined Water Dive with BP/W experience

[Peter Guy]

when I tried to descend it was hard to sink below a couple feet.

Anyone besides me find this an interesting comment? Will someone please explain the physics of this to me -- that is, how can one descend "a couple feet" and then not be able to sink any more -- assuming no other changes in finning or breathing or BCD inflation?

If you can descend "a couple feet" you can descend.

Pretty clearly the individual was either:

a. Starting to kick up (one of the problems of doing a vertical descent);

b. Taking a deeper breath and perhaps holding it; and/or

c. Adding too much air to BCD.

 

[rx7diver]

Anyone besides me find this an interesting comment? Will someone please explain the physics of this to me -- that is, how can one descend "a couple feet" and then not be able to sink any more -- assuming no other changes in finning or breathing or BCD inflation?

If you can descend "a couple feet" you can descend.

Pretty clearly the individual was either:

a. Starting to kick up (one of the problems of doing a vertical descent);

b. Taking a deeper breath and perhaps holding it; and/or

c. Adding too much air to BCD.

d. Exhaust bubbles are getting trapped by diver's hood. Cone head makes diver more buoyant.

e. Water temperature is significantly warmer than air temperature. Brief time immersed makes bubbles in neoprene expand, making diver more buoyant.

 

[EFX]

Anyone besides me find this an interesting comment? Will someone please explain the physics of this to me -- that is, how can one descend "a couple feet" and then not be able to sink any more -- assuming no other changes in finning or breathing or BCD inflation?

If you can descend "a couple feet" you can descend.

Pretty clearly the individual was either:

a. Starting to kick up (one of the problems of doing a vertical descent);

b. Taking a deeper breath and perhaps holding it; and/or

c. Adding too much air to BCD.

d. Exhaust bubbles are getting trapped by diver's hood. Cone head makes diver more buoyant.

e. Water temperature is significantly warmer than air temperature. Brief time immersed makes bubbles in neoprene expand, making diver more buoyant.

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[DaK1]

Thanks for the advice everyone. I will check up on all those the next time I dive.