Home Tournaments Calendar Weather Merchandise Sponsors

Go Back   Spearboard.com - The World's Largest Spearfishing Diving Boating Social Media Forum > United States Geographical Locations > California Off-Topic

California Off-Topic Remember that politics/religion and general off-topic belong in Special Forums.

Reply
 
Thread Tools Rate Thread Display Modes
Old 06-27-2019, 08:33 AM   #16
Diver278
Registered User
 
Diver278's Avatar
 
Join Date: Sep 2011
Location: San Diego,Ca / Dapitan, PI
Posts: 464
Re: Weight for salt water locations

Quote:
Originally Posted by SEATUX View Post
You really want to split hairs?
Go here:
https://en.wikipedia.org/wiki/List_o...er_by_salinity
Thanks Seatux I wasn’t really trying to split hairs just courious. Great info though. Thanks a lot good reading material.
Diver278 is offline   Reply With Quote
Old 06-27-2019, 11:42 AM   #17
PigStikr
The Stalker
 
Join Date: Apr 2007
Posts: 635
Re: Weight for salt water locations

Actually the weight of your air is going to be the biggest factor. If you leave 500 psi in the tank your tank will gain about 4.5 pounds buoyancy during the dive. A steel 80 weighs less than an aluminum 80, is shorter, and is negatively buoyant after the dive. The aluminum 80 weighs more, is longer, and is buoyant after the dive.
Thus you can dive with a lighter tank AND take about 4.5 pounds off your weightbelt if you use steel. Most charters will only provide aluminum and many can't fully fill a steel tank.
The main takeaway though is that the air in your tank is going to be a much bigger factor in your buoyancy than salinity. Also, if you wear a thick wetsuit locally but a thin one on the trip you will have to dive with less weight. Be sure, either way, that you have enough weight to stay down for your safety stop at the end of the dive.
Edit: I am talking about high pressure steel 80 tanks.
__________________

Last edited by PigStikr; 06-27-2019 at 12:07 PM.
PigStikr is offline   Reply With Quote
Old 06-27-2019, 05:13 PM   #18
Diver278
Registered User
 
Diver278's Avatar
 
Join Date: Sep 2011
Location: San Diego,Ca / Dapitan, PI
Posts: 464
Re: Weight for salt water locations

Yes tank size and type of tank make a difference. I use my 100 steels and I use 4 lbs of weight with a 1.5mm suit. With a 80 aluminum I have to use more weight to get down. Although I’m not sure how much weight I will need this trip sense I lost almost 20 lbs. Guess I’ll find out in three week from now.
Diver278 is offline   Reply With Quote
Old 06-27-2019, 05:19 PM   #19
PigStikr
The Stalker
 
Join Date: Apr 2007
Posts: 635
Re: Weight for salt water locations

Have a great trip! Post some pics for sure!
I had HP 120's but after taking up freediving could get 2 dives per tank, don't know why. So changed to HP 80 steel. If I ever run into a lot of money gonna surf/dive indo in that order, if they let me spearfish (freedive) that is. Never freedive after SCUBA tho, get U bent.
__________________
PigStikr is offline   Reply With Quote
Old 06-27-2019, 07:22 PM   #20
SEATUX
Registered User
 
SEATUX's Avatar
 
Join Date: Apr 2005
Location: Port Charlotte Fl
Age: 77
Posts: 2,499
Re: Weight for salt water locations

Quote:
Originally Posted by PigStikr View Post
Have a great trip! Post some pics for sure!.
I second that
SEATUX is offline   Reply With Quote
Old 06-27-2019, 10:55 PM   #21
Diver278
Registered User
 
Diver278's Avatar
 
Join Date: Sep 2011
Location: San Diego,Ca / Dapitan, PI
Posts: 464
Re: Weight for salt water locations

Thanks I sure will. And yes I’ll post pics.
Diver278 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:04 AM.


The World's Largest Spearfishing Diving Social Media Forum Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2002 - 2014 Spearboard.com