Last ditch to be sure.....
Cause you gotta see it coming, then react fast...not an easy task!!
There was alot of talk about them when I was at amphibious warfare school in Coronado. The common thought was even the 12 gauge version was not real good, unless you have precise placement....sharks do not have very big brains and do alot of stuff simply by instinct. There was discusiion of the 'concussion' of a 12 gauge shell going off so close to your ear...apparently one combat swimmer lost an ear drum(remember they are under pressure!). AND the blood generated by a hit....a feeding frenzy is something best left for nightmares!!
But most interesting was the concept that was being experimented with of using a thick steel hyperdernic needle(do not know the gauge), connected to a CO2 cartridge. Pentrate the skin, which activated the release of a very large bubble in target to push internal organs all over the place with minimal blood loss through the wound....or so it was said. Little noise and blood, in a small package was a pretty good idea.
I do not read diving magazines, and not have I heard of the idea anywhere else...so I do not know if it was a successful experiment or not....
I imagine, you could even get some sort of magazine fed, pressurized launching system for multiple shots.
The device discussed was useful for sharks, but I think the concept was really geared more towards ,um, humans...other combat swimmer's. And I imagine a diver coming up next to a small boat could make quick work of a small crew...pretty much a guarenteed one shot stop! With almost no noise.
If it worked!
Dang...the stuff you remember...that was 23 years ago!!
Jercamp45
Just an old Grunt