Hickdive
Contributor
Bangstick or Spear gun works fine.
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Walter:Noise pollution. I hate 'em all. Reach over and touch your buddy on the arm.
If you can't get your buddies attention, how do you call the dive? Is a solo ascent a better solution than shaking a rattle stick? Doesn't calling the dive just create more problems/perils than re-establishing audible communications?
DivingsInMyBlood:should develop electronic shock collars like the ones they use on dogs to get them to respond if their sluggish in response.
I use a "whooooo whooooo whooooo". It works well over normal buddy distances. I did have a couple of instabuddies that heard it, but didn't know what it was and didn't think to look at me. Nowdays I brief instabuddies that if hear an owl underwater, that they should look over at me.Hank49:I hum a deep G note....well pretty close to a G. My kids know that's my signal and respond immediately.
jefffalcone:A carabeener makes a good tank banger.
Doesn't hitting the $1,000 flashlight against the tank tend to break that expensive bulb ?????Ben_ca:$1,000 flashlights work pretty good
MarkUK:That doesn't work very well when I am low on the wall in 30m or so shooting a silhouette shot of my buddy further up the wall in 15m and need to get their attention to turn their torch on or off, look a different way, or move position.
I agree about noise pollution when it is all going off, but I can tolerate very occasional uses when it is absolutely required.
Mark