Hi Ivan,
I do hunting in wreck very often, but on scuba. Me can't go down to 60 feet on apnea so....
Anyway my wreck is a 565 foot HMAS Perth which belongs to ur navy, sank in WW2. It lies in 125 feet of water with top deck at 65 feet and water visibility by average at 4 meters or less. The current is wild most of the time ( depending on time & tide ) and can hit up to 2.5 knots or more.
I use 500 lbs coated stainless steel cable for shooting line but since I am on scuba I tug-of-war with anything I shoot, without cable I will loose even a 7 kg Golden Trevaly common to this wreck. The same I think will apply to ur situation. Mine comes with a swivel clip so I can remove the shaft and shooting line only even without a knife...remember I have an air tank on my back.
We never use floatline because we will be drag down by the current.
Do some research on the wreck age. In shallow tropical water, wreck get ruined much faster. Stay away from overhead environment, don't even think of going into the wreck for the grouper which likes being inside. Up current and around the eddies ( swirl ) is where I find most fish. I always use my Riffe Ice Pick breakaway spearhead on wrecks because I find them superior for tug-of-war with fishes, don't open wounded flesh a great deal. For freediving wrecks and 7mm shaft, don't use this spearhead, they fall off easy.........sometime.
I think a float will be better than reel in ur wreck. As Frenchy put it, make sure u have a sharp knife. U can't have a float only as deep as the wreck cause it will be difficult to pull. In most cases the float will not be exactly on top of you but rather at an angle and that means extra length maybe necessary.
If you fear that a fish will line wrap around the structures of the wreck, I think you need to reel in the moment you shoot, but make sure ur Hawaiian flopper can take the tug-of-war. Not all fishes go making knots on ur shooting line on the wreck. In most cases they will be the Trevallies, grouper and snappers. Other species will most likely head for open water....Spanish mackerel and Barracudas.
As for the Tiger shark, me no comment cause me will run if me see one
. If us ay that the Tiger shark is a Monster type I will......pee in my pants if I see one. Honest !!!!
It will be best to have a buddy standing by with a loaded gun and be willing to part with it if u ever decide to shoot the Tiger. I heard Tiger likes going close to shore in the evening or when it gets darker.
Look for damage or open wound on the hull. Fishes love going in and out of these area, especially if it gets current going into these holes. If u can apnea well, be on top of the wreck around these holes and wait for the fish traffic.
I am sure u will find quite a few red trouts around the wreck. If this wreck is seldom fished or speared, I am sure there will be one "Boss" grouper waiting... a big one.
Ur 104 feet wreck with 50 feet viz sounds like a safer one to me. Any wreck which is far away from a coral reef will hold more fish than a wreck just next to a reef..........my finding. At this deeper wreck, u might get fish around the 30-40 feet water column, those mid water pelagics. U will also need less time to study the structure. If a wreck is 8-10 feet viz like what I get from HMAS Perth when I first dove it, it took me more than a few hours and many dives just to learn which part is which on this gigantic 565 foot ship, the shape is so confusing if this big and water this bad viz.......... trust me. The one time I was blessed with 40 feet viz, only then I can imagine properly how it look like. Learning the complete shape of a 100 footer ship is totaly different that of a 500+ feet in 8-10 foot viz.............and quite scarry too cause over 500 people died here :waterwork.
Whatever you do, take ur time and be careful. No fish is worth risking long dive...remember that. I still want to spear with u one of these days dude...
Bring plenty of extra shafts, 7mm in wrecks with a 10+kg fish is like a tooth pick. With the fertile waters around Australia, I won't be surprised u will be overwhelmed by the fish !!!
OK young man, becareful....you hear....
. Have fun.
So when do I get invited ????:t :t
IYA