mike_s:
http://www.mcmurdo.co.uk/?Menu=17&Page=/Contents/ListProducts.asp&Tech=True&ID=8115
says they are only rated to a spec for 1 meter imerrsion
However, there appears to be a "dive cannister" that is rated
to 150 meters.
http://www.mcmurdo.co.uk/?Menu=17&Page=/Contents/ListProducts.asp&ID=1094
Kinda a neat idea. especially for diving in questionable condidtions.
It might be expensive, but I guarentee I could sell them to these guys who are in the news story for twice the list price.
edit:
wow... I didn't realize how expensive that dive canister was for it. ($295).
how deep can you take a small pelican box?
Get the canister. If there is any water in the unit its no good, and you wont know until you need it. Thas why they use the $100 lithium batteries too. Figure about $1000 for the GPS coupled PLB, canister, and other location devices (smoke, flares, dye packs).
Read up on how EPIRBs work before putting too much trust in them. They advertize 10 minutes before rescue is on the way, but it RARELY works that way. Check what the Coast guard says instead (2 to 4 hour delay). There are about 20 false alerts for each real one. This is much better than the earlier generation (ELTs) where there were many more than 99 false alerts for every real one. The false alerts consume as much coast guard resources as the real ones do, so dont fool around with them.
Part of the reason is a set of changes in procedure. They wait for two satalite hits before launching a search, unless the emergency has been comunicated some other way. Launching a search is not automatic, there are three people invloved before it even gets to search and rescue. In this case they might have been found in 4 hours instead of 10, if they had an EPIRB. Still this is quite an advantage. Florida and Hawaii are the best locations for their use. Elsewhere it is much worse.
Look up on the Coast Guard sites or wikipedia before you count on just an EPIRB. Check out this site
http://www.tabula-international.com/DIV/SMB3.html
to see what you will look like to an airplane at 700 ft. Look at the second picture on the page to get some idea of what you look like on a clear day, with no waves. Remember he has release a dye marker and a large SMB. You are a very small target, even if they locate your EPIRB to 100 ft, and fly over you at 1000. It gets much worse if there are any waves, white caps, or junk on the surface. Dye packs are pretty easy to spot from the air, if it dosn't dispurse before the plane gets there.
If you are going to carry an EPIRB also carry other stuff to facilitate visual location. Flares, signal mirrors, smoke, surface streamers and dye packs are all useful. Make sure that you register your EPIRB if you get one, unregistered they are useless. Even without an EPIRB don't count on much searching going on after dusk. The link above has a great review.
Its much better to take reasonable precautions to prevent the need for a rescue. Consider the risk factors of the dive before you make it, rather than hoping some bit of electrical gear will save you bacon. If you leave your boat make sure that it is very securly anchored, as mentioned earlier. Here we tie our dive reels off to the boat if we do this. This will let you know quickly if the boat starts to drift. Lost at sea kinds of incedents are realy quire rare.
Check out incedents about how many out of air, medical problems and intanglement incidents there are. Even shark attacks are much more common.