Tank Bouyancy

What do you use? Got a question about buying and maintaining your tank /valve? Then post in here.

Tank Bouyancy

Postby NEMES1S » Fri Feb 19, 2010 11:08 pm

User avatar
NEMES1S
Moderator / NIGHTDIVERS99 Crew
 
Posts: 2116
Joined: Wed Mar 26, 2008 9:40 am
Location: South Coast Wellington

Re: Tank Bouyancy

Postby Paul » Sat Feb 20, 2010 9:23 am

Quite a difference there in different types of tanks!
Thanks for that link.
Who needs a hobby when you have an obsession?
User avatar
Paul
Member
 
Posts: 282
Joined: Thu Jan 29, 2009 9:16 am
Location: Wellington

Re: Tank Bouyancy

Postby ChuckyBob » Sat Feb 20, 2010 10:31 am

I think the main point to take from the video ( apart from that ALL tanks inc steel change in buoyancy) is that you need to understand the buoyancy characteristics for the tank you are using in the water you are diving.
Not all 80cf tanks are created equal and not all water has the same density ( eg NZ waters vs Red sea).

I guess this does not matter so much for back mounted cylinders as all you need to do is a simple buoyancy check before the dive.
But when slinging tanks if/when the tanks go from negative to positive buoyancy they will ride differently.
I guess the advantage of steel is they will not go positive and so will ride the same though out the dive.
I wonder if any sidemount divers add lead to their ali tanks?
User avatar
ChuckyBob
Member
 
Posts: 1288
Joined: Fri Apr 03, 2009 1:51 pm
Location: over here.

Re: Tank Bouyancy

Postby NEMES1S » Sat Feb 20, 2010 11:22 am

Yeah I thought it was interesting as well, I have been looking at a lot of this guy Steve Bogaerts dive stuff,he really has some of the most amazing buoyancy skills I have ever seen.
Definitely something I want to aspire to...

Heres a cool video from an eerie dive site that has been nicknamed "HELLS BELLS" which as I can gather is actually a Cenote in Mexico,look out for the Halocline at 0:56 what a dive site..

http://www.youtube.com/watch?v=28qQzQ36sXc

And also the video that Andy posted previously.

http://www.youtube.com/watch?v=8ahQYqho ... re=related
User avatar
NEMES1S
Moderator / NIGHTDIVERS99 Crew
 
Posts: 2116
Joined: Wed Mar 26, 2008 9:40 am
Location: South Coast Wellington

Re: Tank Bouyancy

Postby binklebonk » Sat Feb 20, 2010 11:34 am

Wow "hells bells" looks very cool! 8)

That guy has such a relaxed style, a real pleasure to watch.
User avatar
binklebonk
Member
 
Posts: 1776
Joined: Wed Apr 01, 2009 5:03 pm
Location: Peoples Republic of Wellingtron

Re: Tank Bouyancy

Postby NEMES1S » Sat Feb 20, 2010 1:08 pm

binklebonk wrote:Wow "hells bells" looks very cool! 8)

That guy has such a relaxed style, a real pleasure to watch.

Yeah what a site aye...crazy...love the way he just falls downwards effortlessly....
Heres another:

http://www.youtube.com/watch?v=yDp58Wrz4Uk&NR=1
User avatar
NEMES1S
Moderator / NIGHTDIVERS99 Crew
 
Posts: 2116
Joined: Wed Mar 26, 2008 9:40 am
Location: South Coast Wellington


Return to Tanks

Who is online

Users browsing this forum: Bing [Bot] and 1 guest