dont bother with charts. Too many variables.
As others have said, FULL dive gear and kit minus ditchable items such as torches, in the ball, correctly weight (it helps if tanks is down to reserve pressure) and then adjust for salt water.
Its by far the best method and doesnt take too long.
Recently had a new dry suit so its a swimming pool heated to 30c, air temp roughly the same (indoor pool) in new suit, thermal undersuit, 2 pairs of socks, cotton top under that lot, hood, gloves.... Not fun but essential.
As others have said, FULL dive gear and kit minus ditchable items such as torches, in the ball, correctly weight (it helps if tanks is down to reserve pressure) and then adjust for salt water.
Its by far the best method and doesnt take too long.
Recently had a new dry suit so its a swimming pool heated to 30c, air temp roughly the same (indoor pool) in new suit, thermal undersuit, 2 pairs of socks, cotton top under that lot, hood, gloves.... Not fun but essential.
