Welcome to ScubaBoard, an online scuba diving forum community where you can join over 205,000 divers from around the world discussing all things related to Scuba Diving. To gain full access to ScubaBoard (and make this large box go away) you must register for a free account. As a registered member you will be able to:
Participate in over 500 dive topic forums and browse from over 5,500,000 posts.
Communicate privately with other divers from around the world.
Post your own photos or view from well over 100,000 user submitted images.
Gain access to our free classifieds marketplace to buy, sell and trade gear, travel and services.
Use the calendar to organize your events and enroll in other members' events.
All this and much more is available to you absolutely free when you register for an account, so sign up today!
If you have any problems with the registration process or your account login, please contact the ScubaBoard Support Team.
No, this isn't a rehashing of the sub-duck vs the mini-hammerhead. We need a diver recall device from the surface without spending a fortune. I'm a volunteer diver at our state aquarium. Right now, our recall device is that the standby diver above bangs on the metal ladder with a lead weight. It doesn't make a loud enough noise to distinguish itself from other noises sometimes heard in the tank.
I know there are diver recall systems that use either microphone or tones through underwater speakers, but they start at about $1,000. And putting a hammerhead on a reg with an extra tank to use at the surface just isn't practical in an emergency.
If anybody remembers the old TV show "Flipper", they had a hand-held horn that looked like a megaphone. As I recall, they put it in the water and squeezed the trigger and it made a kind of "aahoooga" sound that brought Flipper magically to the boat or dock. Now I know we don't have the same kind of hearing reception that a dolphin has, but isn't there something like that around that could be used to make a sound from the surface that would be audible throughout a 760,000 gallon tank (about 50 feet diameter and 25 feet deep)? I figure something like that would sell for about $100 or so.
Have you tried dynamite? I have been told it makes a very loud noise...
Just kidding, sorry I couldn't help myself.
We've used underwater speakers connected to a p.a. system. Turn up the volume and just speak clearly into the microphone. It works well, and other than the speaker, all parts are off the shelf.
A good instructor is not one who impresses students with the depth of their knowledge;
Rather, they impresses upon students a depth of knowledge.
(c. 2004)
Yes, I know this is an old thread.....resurfacing for my own selfish reasons
Did you find a cheap alternative? We are looking for something for our dive boat. I am thinking of taking a speaker and putting it into a ziplock bag (not really but similar) or capped PVC tubing with wiring coming out and epoxied water tight again. Then hooking this up to the radio or a microphone system. Anyone tried this? Other ideas or alternatives?
LinkBack URL
About LinkBacks
Reply With Quote
