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ABBAFAN · 01-22-13, 06:36 AM

I know about hot air balloons, I was making the comparison with gas balloons which are rather different.

Do they close the valves at the bottom of the ballast tanks once blowing has been done and the vessel is on the way to the surface?

01-22-13, 06:36 AM	#23
ABBAFAN Commander Join Date: Sep 2001 Posts: 456 Downloads: 0 Uploads: 0	I know about hot air balloons, I was making the comparison with gas balloons which are rather different. Do they close the valves at the bottom of the ballast tanks once blowing has been done and the vessel is on the way to the surface? __________________ CHOOSE RFA! LESS GRAFT, MORE PAY.