NSS-CDS removes air sharing...

[kensuf]

You can hold the donated second stage with the hand that is protecting your head, while managing the hose and line with your other hand.

 

[Umuntu]

You can hold the donated second stage with the hand that is protecting your head, while managing the hose and line with your other hand.

Air donation should be as simple as possible and a one hand/arm operation ...

 

[kensuf]

Air donation should be as simple as possible and a one hand/arm operation ...

In cave class, you should be taught to protect your face from getting smashed by a rock. One hand on the line and hose so you don't get lost, one hand in front of your face to protect it.