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#1
March 24th, 2008
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A friend and myself have decided to pick up spearfishing. When we are at the local lake visibility averages maybe 5 feet, more or less. We probably dive anywhere from five to fifteen meters. When diving in this low visibility condition, what can a safety diver do to be, well, safe seeing how you can't really see your buddy 95% of the dive.
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#2
March 24th, 2008
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I found an interesting document of Czech freedivers who often dive in similar conditions. They created a protocol for acoustic communication underwater - they have signals of different pitch for different situations - reaching the bottom / going up / are you OK? / OK / not so OK / distress / ...
The document is in Czech only, but you may understand something from the diagrams: http://www.volny.cz/potapky/dokument/zvuky.doc You can also try using an online translation tool, such as at Free Online English to Czech Translators
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#4
March 25th, 2008
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Nothing special. Water transmits sounds quite well.
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#6
March 25th, 2008
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If you both use float lines to a float (a good idea), then you can watch the float move and have some idea where your buddy is. If you use bottomtimers, agree on a maximum dive time based on your abilities (ie: you-1:30, your buddy-1:00). That way, if your buddy doesn't surface, you can head down his float line and try to retrieve him. I dive in brutal vis all the time. Buddy-spearing is not foolproof, especially in bad vis, but there you go.
__________________
"I tell you, we are here on earth to fart around, and don't let anybody tell you different" - Kurt Vonnegut  http://www.probablefuture.com/ http://www.elysha.org/writings1.html
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#8
March 26th, 2008
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Either to the speargun at the hilt or to your belt. Tied to the gun is good in case you have to drop the gun ie: if the spear gets stuck in the bottom of the lake, but tied to the diver is safer for the possibility of retrieving a lost diver. But tied to the belt is annoying I find, and you could get tangled too.
__________________
"I tell you, we are here on earth to fart around, and don't let anybody tell you different" - Kurt Vonnegut http://www.probablefuture.com/ http://www.elysha.org/writings1.html
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#10
March 26th, 2008
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First I'd say make sure it's an actual spearo floatline- even a cheap one, as opposed to using rope to tie to your float- ropes tangle and you end up with a big cluster###k haha.
Heavy Duty Floatline $73.80 -$82.80: Spearfishing Gear Tie that from your gun to the float is the standard procedure. Omer Atoll Float: Spearfishing Gear Another thing you could do is to have a weight at the end of the line, drop the weight to the bottom and agree to stay within the visibility distance of the line, taking turns diving. Personally, I tie to the gun, and my buddies and I usually head in different directions... not my best advice, but diving in bad vis means that the other guy is kicking up the silt/goo and scaring MY fish away or worse yet- shooting them lol.
__________________
"I tell you, we are here on earth to fart around, and don't let anybody tell you different" - Kurt Vonnegut http://www.probablefuture.com/ http://www.elysha.org/writings1.html
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