Fins come off when jumping from 20 feet with snorkel gear. Have large post fins, and use ratcheting flat straps with plastic hardware, but the plastic hardware breaks... I see there are metal brackets with holes and bolt/nut that is installed so the bracket is trapped and can't come off the post,, that's all good,,, and that they go over large 20mm posts, that's good,,, but they are all spring straps with a cave line inside so the spring doesn't stretch too much. ...I need flat straps, no springs allowed, jumping out of helicopters. Anyway, anyone know of a large post fin strap that has the metal post receiver with the 20mm/13mm holes/bolt I mentioned above,, but which uses a ratchet rubber strap, or some kind of flat strap with that uses something like the old jet fin wire buckle,, but must be mounted or secured to 20mm flange/13mm throat post. I can't find anything like that.
jumping off high platforms with spring straps
- Thread starter ark7750
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Alaskan Scuba Dude
Banned
Have you tried jumping in the water without your fins on?
I also think the fin keepers might work.
makospearguns.com
Freedive Fin Keepers
Holds your feet firmly in your fins, which are particularly useful when you wish to dive without socks. Includes a pair of Fin Keepers.
makospearguns.com
rx7diver and ark7750:
I have a bit of experience with both parascuba jumps and jumping from a helicopter. I usually used Scubapro Jet Fins, which have a metal buckle or my own "Scoop Fin" I made from White Stag fins. The Jet Fins are still being made, and work well out of helicopters. For our parascuba jumps, we usually used these fins (or duck feet fins, which have a continuous strap that has no buckle). Both are available. You may be able to get the strap for a Jet Fin from Scubapro.
Scubapro Jet Fins, Black
Setting the standard back in 1965, yet still today the choice of many experienced divers the ultimate Jet Fins made from high-quality rubber. The Scubapro Jet Fin was original and after over 50 years s
www.scuba.com
CLASSIC VOIT DUCK FEET FINS TEAL / ORANGE
Voit's Legendary Duck Feet Fins are back! This legendary fin is constructed from dual-density rubber with a soft rubber foot pocket and a stiff blade. Non-marking and full-floating, this fin is hydro-dynamically designed for greater propulsion with minimal effort. Ideal for surfing, swimming...
voit.com
We also took another precaution of using masking tape to tape the fins to our feet. Masking tape will help keep the fins from flying off during a parascuba jump into the prop blast of a HC-130 Hercules aircraft, and will also help keep the fins on the feet on a helicopter jump. Fin keepers may help, but are also stretchy; the taping, we found, works better.
For a helicopter jump, try to tell the flight engineer to get the helicopter to 15 feet or lower. Jumping from 20 feet is a bit "iffy" as it is more difficult to keep a feet-down orientation from that height (from experience). Relying upon the pilot to determine height is problematical, as the pilots do not have a good perspective to see how high they are, and their instruments may not tell height over the water (altitude is not height over water). In many helicopters, pilots cannot see directly down too. It's best to have another person in the door directing the pilot.
SeaRat
Attachments
Not a good idea to jump from a helicopter without the fins, and try putting them on in the water. It's very easy to loose the fins that way, and putting them on in the water is problematical.
SeaRat
