dbulmer:
Boogie,
Where do you keep the speargun - does it dangle off a wing/BC? If so, how close can your buddy get to you in an emergency ie OOA without a) Puncturing himself or you 2) Takes more time to get to you 3) Could puncture wing/BC and/or drysuit/wetsuit. 4) Probably cares more about the prey than his buddy 5) May like to dive solo - (heh for those of you who like solo diving that's your choice - I'd probably die at my current skill level so I would not do it)
The speargun belongs in your HAND! It should NEVER be clipped off or tied to anything you need to survive!
Given that proper weapons handling rules are the same above and below the water a) through 3) are non-events and will not happen. Put the fantasy world away now.
4) wrong buddy! Team hunting takes serious skill development.
5) Also a valid answer, but solo diving skills are a REQUIREMENT for safe spearfishing. No buddy is going to keep up with a 70 pound finnd DPV.
dbulmer:
Boogie,
Secondly, possibility of attracting unwanted sea life ie largish sharks which increases the probability of an incident and adds stress to the dive.
Risk control is part of the game. If all else fails most sharks are quite good on the grill, smoked, jerked, baked, or fried.
dbulmer:
Boogie,
Thirdly, fish are precious enought and killing 'em underwater with a speargun just isn't cricket - why not go fishing instead where it becomes a fairer game.
Spearfishing is THE most effecient and ecologically sound method of collecting fish and shellfish for the table. The harvested fish is killed cleanly, and nothing else gets hurt. The line left by the hook and line folks keeps killing for years if not decades. The nightmare commercial fishing techniques impose on the ecosystem is nucular holocaust by comparison.
Next time you're down see if you can get close enough to a large untame fish to touch him. A spearfishing shot is generally made at distances of less than a spear's length. It's like hunting bear with a slingshot, much harder than the hook and line technique. I fished with a pole for decades. Limiting out was never a problem once I understood the target species. To be successful hunting fish you have to be a hole in the water, and non-threatening right up to the shot. Ambush hunting is a rather unique skill.
BTW I've rarely heard of a hooked fish killing the line fisherman. We loose several divers every year here in the Gulf of Mexico to fish, and often one or more to the tax collectors. Nothing is fairer than when the prey has a chance to win with YOUR death.
dbulmer:
Boogie,
Finally, if a speargun misses from an inexperienced bloke, it could cause damage to a reef/coral or other endangered sealife.
It also totals the spear and/or speartip. This is quickly self-correcting and hunters rapidly learn not to shoot towards hard stuff. Weapons rules require knowledge of where the shot will strike. If you don't KNOW, don't shoot!
FT