readjusting weight

[vinnydav]

Diving in Florida in a 3mm wetsuit ,a jacket bc and aluminum 80 tank I use 16 lbs of weight. I am changing my bc to an aluminum back plate and my tank to a hp steel 100. If I did the math correct I should be down to about 5lbs of weight;

origional 16 lbs
al80 -4 lbs
back plate -2 lbs
steel 100 -5 lbs
new weight 5 lbs

I know I need to do a weight check check in the water but I need to double check if this is a good estimate.

 

[GrumpyOldGuy]

It is hard to determine from the net numbers you gave, steel tanks vary depending on the manufacturer. The 9lb difference for the tanks (+4 to -5) might be correct, or 3lbs high depending on the actual tank.

 

[TSandM]

Is that one of the very negative Faber tanks? Otherwise, most steels are more like -1 or -2 when empty, which is where you have to do the calculation.

I'd say you'll probably lose 2 lbs with the switch from BC to backplate (maybe 3), and five pounds with the tank change, so I'd start with 8 lbs and see how it goes. Being a pound or two over is MUCH more comfortable than ending a dive and discovering you're several pounds light!

 

[Mopar]

I have been useing LP77, 3mm wetsuite and an Aeris BC and and need 4 lb in the ocean. I assume you are talking about the saltwater.

 

[RonFrank]

I was about to comment, but TSandM said exactly what I wanted to post. She provides good advice, and I'd take it! Too heavy by a couple of lbs is MUCH better than too light!

Ahh, hold the train, the OP listed his tank weights twice. I think going from an AL80 to an HP100 is about 6lbs difference max. I'd say 6lbs for the tank change, 2 lbs for the BC, so 8lbs + a couple for comfort = 10lbs. You still may get down to five as a LOT of divers discover they are over weighted in the first place.

I dive with 8lbs or so with an AL80 in a 3mm with a Zeagle Stiletto (Salt), but your mileage will vary. I dive a couple of lbs heavy. There is really no reason to dive on the edge so to speak.

 

[HowardE]

I'd agree with TSandM. You'll probably to wear 8 - 10 Lbs of lead.