Updates from GUE - Valve drills/S-Drills

*JohnKendall* · November 24th, 2005, 11:32 AM

Hi All,

I'm going to send out a few posts with some of the updates that I gleaned from the ITC and my time in FL. Hopefully you'll find them useful, or at least interesting. Please note, These are not my ideas, I am happy to try and give you the reasoning behind them as I understand them.

S-Drills/Valve drills - At the beginning of each dive you should be doing a Valve Drill and an S-Drill. On a lot of dives you will be doing Modified versions of these (particularly in Ocean) however when you are doing the full version you should be doing the Valve drill first. The reasoning for this (As I understand It) is that you will have done Mod-S and Mod-Valve on the surface, so your long hose should be deployable. However the S-Drill acts as a check AFTER you have been manipulating your valves. That way there is No way that you can swim into a cave having forgotten to turn your left post back on.

J

fraser · November 24th, 2005, 02:15 PM

Hi John,

Thanks - posting these updates is a great idea mate.

Fraser.

November 24th, 2005, 11:32 AM	#1 (permalink)
JohnKendall(Offline) GUE Instructor/DIRX Moderator Join Date: Nov 2005 Location: Cambridge, UK Posts: 1,100	Updates from GUE - Valve drills/S-Drills Hi All, I'm going to send out a few posts with some of the updates that I gleaned from the ITC and my time in FL. Hopefully you'll find them useful, or at least interesting. Please note, These are not my ideas, I am happy to try and give you the reasoning behind them as I understand them. S-Drills/Valve drills - At the beginning of each dive you should be doing a Valve Drill and an S-Drill. On a lot of dives you will be doing Modified versions of these (particularly in Ocean) however when you are doing the full version you should be doing the Valve drill first. The reasoning for this (As I understand It) is that you will have done Mod-S and Mod-Valve on the surface, so your long hose should be deployable. However the S-Drill acts as a check AFTER you have been manipulating your valves. That way there is No way that you can swim into a cave having forgotten to turn your left post back on. J

November 24th, 2005, 02:15 PM	#2 (permalink)
fraser(Offline) "I'm only late on your timescale" Join Date: Nov 2005 Location: Kent, UK Posts: 463	Hi John, Thanks - posting these updates is a great idea mate. Fraser. __________________ Damn it feels good to be a gangsta