hello all ,
    sorry if the html and stuff on my posts irritated anyone. i was unaware of it not working correctly. is this better??
 
        getting back to the aow thing --- pdic does allow some latitude in the teaching as long as the minimum standards are adhered to. this makes it easier for a good instructor to function and turn out quality divers.
        the buddy alert thing i think is a good option but i personally still go for the tank banging. the rubber band with a ball around the tank elimnates having to release the knife . and there air a few air actuated ones i have seen lately . one customer of mine had one that attached to the power inflator and sounded like a duck quacking underwater . it always brought a smile to my face when i heard it. 

capt dennis