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Re: Negative Buoyancy
Posted by: J.T. McDaniel ()
Date: July 17, 2002 11:55PM

The negative tank is an internal variable ballast tank, used to make the boat negatively buoyant in order to speed up diving. Also sometimes called "quick diving" (Q) tank. The order to "blow negative" is given as soon as the boat is (mostly) under, since you don't really want negative buoyancy once you're submerged. Neutral buoyancy would be ideal, but is virtually impossible to manage, so you generally settle for a very slight positive buoyancy and use the planes to hold the boat under.

J.T. McDaniel

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Subject Written By Posted
Negative Buoyancy Harvey 07/17/2002 11:03PM
Re: Negative Buoyancy J.T. McDaniel 07/17/2002 11:55PM
Re: Negative Buoyancy ROBERT M. 07/18/2002 01:17AM
Re: Negative Buoyancy Scott 07/18/2002 09:57PM
Re: Negative Buoyancy ROBERT M. 07/19/2002 01:50AM
Re: Negative Buoyancy kurt 07/19/2002 01:41PM
Re: Negative Buoyancy ROBERT M. 07/19/2002 10:47PM
Re: Negative Buoyancy kurt 07/20/2002 12:36PM
Re: Negative Buoyancy ROBERT M. 07/20/2002 08:23PM
Re: Negative Buoyancy J.T. McDaniel 07/21/2002 01:11AM
Re: Negative Buoyancy ROBERT M. 07/21/2002 03:59AM
Re: Negative Buoyancy kurt 07/22/2002 03:51PM
Re: Negative Buoyancy ROBERT M. 07/23/2002 04:47AM
Re: Negative Buoyancy Don Baker 08/16/2002 04:36PM
Re: Negative Buoyancy Don Baker 08/16/2002 04:36PM
Re: Negative Buoyancy Rainer Bruns 08/27/2002 04:21PM
Re: Negative Buoyancy steve 09/18/2002 10:28PM


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