Pre Dress-In Procedure, Pre-Dive Visual Inspection

Kirby Morgan 77

sembly out away from the base of the helmet. Slightly loosen the screws until the neck pad can slide back and forth. Be sure each of the head cushion snaps are attached to their corresponding fitting inside the helmet.

Pick up the helmet and pull the nose block device knob out fully. Position the helmet on your head so the oral nasal is in the proper position on your face, covering your nose and mouth. Turn the sealed pull pins to the locking position with the ridge on the pins engaging the notch in the sleeve and the pins fully retracted.

Tilt your head forward so the locking collar/neck pad assembly may be swung forward and locked up into its closed position. The sealed pull pins must snap into place on the locking collar.

Lift your head back up and slide the neck pad forward until it is snug but comfortable. Mark the position of the neck pad on the locking collar using an indelible marker. Pull the sealed pull pins out to their unlocked position and let the locking collar open.

Remove the helmet. Position the neck pad plate on the locking collar at the marked position and tighten the screws on each side. After the adjustment screws are tightened, don the helmet again, tilt your head forward and lock the locking collar/neck pad assembly. Move your head in various positions to make sure the pad is adjusted for comfort.

The helmet is now adjusted for your head. It should need no further adjustment unless another diver uses the helmet.

3.5 Pre Dress-In Procedure

Before dressing in for a dive, inspection of the helmet systems must be made to be sure it is in proper work- ing order. This must be done well in advance of the dive so any problems can be fixed without delaying the dive. The following steps are part of the recom- mended daily maintenance.

3.5.1 Pre-Dive Visual Inspection

Visually inspect the exterior and interior of the hel- met.

1)Inspect the regulator cover for any damage. The purge button must work.

2)The neck dam must not be torn or punctured, and properly trimmed to fit.

WARNING

There must be no holes in the neck dam. If there are any holes in the neck dam the helmet could leak or flood. In addition, the demand regulator will not operate properly. Drowning could result.

3)Inspect the O-ring on the neck dam ring assem- bly. The O-ring must be in place, undamaged, and lubricated.

WARNING

The O-ring on the neck dam ring assem- bly on the Kirby Morgan helmet must be in place and in good condition. It must be properly lubricated for smooth opera- tion. Without a proper functioning O-ring the helmet will leak and possibly flood. Drowning could result.

4)Inspect the bent tube that supplies breathing gas to the regulator. There must be no dents or kinks in the assembly.

5)Inspect the face port. It must be in good condi- tion.

6)Be sure the communications wires are hooked up and tested.

7)Inspect the oral/nasal mask. Make sure it is on the regulator mount nut properly and the valve is installed properly.

8)Inspect the sealed pull pin on each side of the hel- met. They must engage and disengage properly.

9)Make sure the head cushion and chin cushion are properly fastened inside the helmet. The chin strap should be open as wide as possible.