Shopper I have seen people commenting and saying that even though this is only designed for surface use it does work underwater. Is there any customer feedback on this? Does it work underwater? Will it ruin it if you DO use it underwater, etc.
ROBERT L Activating whistle underwater will not damage it. However, the sound created underwater is muffled and barely audible. Really meant for surface signaling only.
KEVIN W It will make noise underwater without being damaged, but it is not very loud, and the sound is very different. When used underwater, it sounds like a duck quacking. Not very useful for getting anyone's attention unless you're very close to them. The Dive Alert is more of a surface signaling device. On the surface they are extremely loud. I do use mine underwater for inflating my safety sausage. The inflation tube for the safety sausage (that you would normally blow into) fits perfectly in the "whistle" of the Dive Alert (where the air comes out of it). When using a safety sausage, I can very easily and quickly inflate it with the Dive Alert before surfacing. That way, you never need to take your regulator out of your mouth to inflate the safety sausage.
DAVID H The original Dive Alert does not make any useful sounds underwater, but won't be ruined if you try.
There are other models that attach to the LP inflator hose (between reg and BCD) that work ONLY underwater, and I believe there is one manufacturer that claims that theirs does both. Personally, I use both the Dive Alert and another kind that works underwater, piggybacking one into the other.
Be are that each manufacturer that makes air horns makes different versions that can couple with different brands of BCD.
WILLIAM W No. There is an underwater signal model, but this will pretty much blow bubbles underwater
JOEL S I have used this version for a few years. It's not designed for underwater use. I believe the dive alert plus has the surface and subsurface capability. I have used it underwater and it has not ruined it but the sound is so muted it is ineffective.
Joel
TUNGAN H It does not damage it to try but does not work underwater.
The unit works like a whistle. The underwater version works like a buzzer(vibrating diaphram contacting the water. This unit has a high pitched whistle and you can hear a little bit of a squeal underwater right next to it, the higher frequency pitch does not propagate through water well. I suspect there is a way to modify it to work both ways but I haven't had time to try.
WILLIAM T This unit only works in open air above water. It like a loud whistle driven by air. It does NOT work underwater. But does work great as a locator.
Hope this helps.
Bill