From 13 to 24 lbs

[skinerd]

Howdy
On my second last day of diving I was using 13lbs of weight and found that to be perfect. On my last day of diving I had to bump it up to 24lbs, the only change was an addition of a 7mm hood and gloves. Does this sound way out of wack?
Thanks

 

[Xanthro]

Yes, that would be out of whack.

Is it possible you were using a steel tank on the 13lb day and an AL tank on the last day? Steel tanks are more negatively bouyant and thus you need less weight on a belt.

 

[skinerd]

Nope al-80s on both days. My g/f had the same issue.

 

[rockjock3]

Yes, that would be out of whack.

Is it possible you were using a steel tank on the 13lb day and an AL tank on the last day? Steel tanks are more negatively bouyant and thus you need less weight on a belt.

I would have to disagree with you on this one Xanthro. If Skinerd has an extremely large head and hands then he could add the extra 11 lbs of bouyancy he needed to counteract.

Acutally that would be a big jump. Some explanations could be (not knocking on you just looking for simple answers).

Faulty BCs not getting all the air out.
Were you switching from fresh to saltwater?
Did you suit change?
Possiblly your procedures changed during the end (maybe did first buoyancy check correct but were unconciously finning on the next buoyancy checks.

I don't know if all/some/none of your gear was rented which could rule some of these out.
I don't know your diving experience so it might be little or a lot and could rule some of these out.

 

[skinerd]

All the gear was rented and from different shops. Both dives were in fresh water, and I didn't have to do a buoyancy check to know that 13lbs would be nowhere near enough weight.
Andrew

 

[jeckyll]

Maybe the first one was 13 kilos

 

[Whatgoesdown]

All the gear was rented and from different shops. Both dives were in fresh water, and I didn't have to do a buoyancy check to know that 13lbs would be nowhere near enough weight.
Andrew

Not wishing to knock you here but how did you know that was not enough without a buoyancy check? Whenever I buy a new suit, BC or even reg, I do a buoyancy check with an empty BC to reassess whether I need to alter my weight.

 

[DandyDon]

I'd be surprised if the hood & gloves made even a whole pound of difference. Changing wet suits can add a lot of buoyancy, but not that.

 

[Xanthro]

All the gear was rented and from different shops. Both dives were in fresh water, and I didn't have to do a buoyancy check to know that 13lbs would be nowhere near enough weight.
Andrew

Are you sure the wetsuit was the same thickness? While gear can have different bouyancies, that's too big of a swing.

It would be odd if both of you had air trapped in your BCs.

 

[skinerd]

I didnt need to do a check because when I had all the air out of my B/C I was bobbing around like a cork. There was no way I was getting down with 13#, 24# was the least I could deal with.