>Yes it will be only 50 pounds unless it has developed a leak...one might want to be ready to pull back up several thousand pounds or lose the sub?? Could be as much as 4 or 5000 pounds.
50lb weight belt onto sub
> pull pipe plugs sub will slowly sink to 600 ft
> Wait and hour (nerves will be tested)
> Then pull sub back to surface note you are only
> pulling 50lbs