How long can I stay shallow?

[panamacityman09]

I have been diving for may years, but recently I got a job driving 4 foot pins in repaired river dikes. I have to dive at only 10 feet on average and was wondering since my dive tables dont show how long can I stay under at 10 feet.

 

[pacchill]

I think the Navy table says 300min.

 

[tc]

The older Navy table put you into a group D at 300 minutes at ten feet and don't go higher due to the limited nitrogen load- there is no actual limit at ten feet.

If you're at altitude you should check the altitude tables but unless you're on surface supply and staying down for many hours you'll be OK.