rgbmatt
Contributor
"Hawaiian sling" originally referred to a simple type of spear gun - basically a small tube with a set of rubber bands on one end and an untethered shaft. You pull the shaft back through the middle of the tube, hold it there with your hand, and let it go when you're ready. Hopefully you get a good shot and the fish doesn't run off with your spear.
The term has since been appropriated for various other things, including pole spears and backpacks.
If you want a quick & easy backpack, you can just pull the plastic backpack out of an old jacket BC and put straps on it (most have the slots already). Still will have shoulder straps to deal with but it's a start.
Probably Clark Sales, manufacturer of the ubiquitous Sea Horse 3-prongs. They still make an ever-changing assortment of random diving & fishing stuff (most of it very practical).
I find my hawaiian pack to be very secure - more so than my real "hogarth" doubles setup. To make a modern backplate (or a plastic backpack) fit as snug, I need to tighten the straps to the point where it's uncomfortable. Over several days of diving this results in some pretty sore arms & shoulders. For it to work properly, you really need to make it customized for your body shape - if the hooks are the wrong size or the belt is in the wrong place it'll slip around.
Padding on the hooks isn't really needed unless you're diving with no wetsuit.
Here's a couple pics of mine in use (not catching fish - just throwing sand so the kahala would come in for the picture).
The term has since been appropriated for various other things, including pole spears and backpacks.
If you want a quick & easy backpack, you can just pull the plastic backpack out of an old jacket BC and put straps on it (most have the slots already). Still will have shoulder straps to deal with but it's a start.
Probably Clark Sales, manufacturer of the ubiquitous Sea Horse 3-prongs. They still make an ever-changing assortment of random diving & fishing stuff (most of it very practical).
I find my hawaiian pack to be very secure - more so than my real "hogarth" doubles setup. To make a modern backplate (or a plastic backpack) fit as snug, I need to tighten the straps to the point where it's uncomfortable. Over several days of diving this results in some pretty sore arms & shoulders. For it to work properly, you really need to make it customized for your body shape - if the hooks are the wrong size or the belt is in the wrong place it'll slip around.
Padding on the hooks isn't really needed unless you're diving with no wetsuit.
Here's a couple pics of mine in use (not catching fish - just throwing sand so the kahala would come in for the picture).
). As a result it was not as secure for me as my current BP/W, but more secure than any jacket BC I've used. 
