question from the movies??

[Spoon]

guys this may seem stupid but i have often been wondering if this can be done in real life. im sure you guys have seen navy seals or james bond or a dozen of other flicks wherein a secret covert navy seal teams are on an airplane. they jump and skydive from 15,000-20,000 ft with their parachutes and hightech scuba gear. as they freefall they are breathing oxygen or some gas through their full face masks as they near the water they ditch chutes and descend into the water are still breathing from their masks. same gas? possible?

as they freefall they are breathing oxygen as they dive they would have to be breathing a different mix. not to mention the effects of the high altitude and below sea-level transition in a matter of minutes. im confused hope you understood my question.

 

[avpro4]

I think high altitude to depth is OK. If they left a submarine in the deep, swam to the surface and strapped on a rocket pack to join the airplane at 20,000 feet there would be trouble though!

 

[pt40fathoms]

In my prior life, I made several HALO jumps (High Altitude Low Opening) where we needed to use O2 till we got below 14,000 ft. As long as the team member stays to 20 feet and shallower when they hit the water, the O2 would not be a factor.

Never made the transition to diving while in the military myself. I had enough thrills doing night HALO jumps where the cloud deck is below you and its a new moon.

 

[Spoon]

In my prior life, I made several HALO jumps (High Altitude Low Opening) where we needed to use O2 till we got below 14,000 ft. As long as the team member stays to 20 feet and shallower when they hit the water, the O2 would not be a factor.

Never made the transition to diving while in the military myself. I had enough thrills doing night HALO jumps where the cloud deck is below you and its a new moon.

thats awesome man! how long was your freefall time? wouldnt you want to try this trick now that your doing scuba?

also if the team decided to go beyond 20ft would they be able to if they brought another bottle of gas?

 

[Boogie711]

In my prior life, I made several HALO jumps (High Altitude Low Opening) where we needed to use O2 till we got below 14,000 ft. As long as the team member stays to 20 feet and shallower when they hit the water, the O2 would not be a factor.

Never made the transition to diving while in the military myself. I had enough thrills doing night HALO jumps where the cloud deck is below you and its a new moon.

If it was a 'closed' system, you wouldn't need O2 at altitude - merely a breathable mix... or in other words, plain 'air.'

 

[scubapro50]

HALO jumps are real but best left to the Navy Seals ...... even with the best training they can still kill a guy ....... The little rebreather from THUNDERBALL was fake. I heard that both the Navy and the CIA thought it was real and wanted to purchase them for their people. Most of the dive gear in THUNDERBALL was real and made by VOIT ..... the jet/scuba pack worked but was a problem to control and never made it out of the movies.

 

[laivindil]

HALO jumps are real but best left to the Navy Seals ...... even with the best training they can still kill a guy ....... The little rebreather from THUNDERBALL was fake. I heard that both the Navy and the CIA thought it was real and wanted to purchase them for their people. Most of the dive gear in THUNDERBALL was real and made by VOIT ..... the jet/scuba pack worked but was a problem to control and never made it out of the movies.

I had a pair of VOIT tennis shoes once...

I just want to know how the dive gear in the older Bond movies worked. No BCs. How hard was it to control boyancy in the 60's?

 

[dlegros]

There were no BCs then, just look at The Deep

Dom

 

[Spoon]

I had a pair of VOIT tennis shoes once...

I just want to know how the dive gear in the older Bond movies worked. No BCs. How hard was it to control boyancy in the 60's?

maybe through propulsion devices, with these you dont need a bc

 

[laivindil]

maybe through propulsion devices, with these you dont need a bc

So basicly you just prayed you had the right ammount of weight on?