Anyway, I would use the ship itself as shelter. If it's a small boat, I would try to pull it closer to shore and use local palm tree leaves and branches to construct a home build around the ship itself. This ship will be my makeshift home, but I would go deeper inland and look for a cave and set up another shelter in case of storms since this is an island out in the ocean. Depending on what time of the day it is, I'd build my first shelter before night fall.
Tools would be anything I can find, including home made spears for hunting, but if i had to choose.
My tools I would have would be an E-tool
http://www.uscav.com/productinfo.asp...d=9237&tabID=1 , A machete, an axe, and a K-Bar knife.
I'd find a box of water proof matches, at least one large flashlight, an oil lamp and several containers of gasoline that was for fueling the boat. Now it'll be used for other applications like lighting a fire or getting a fast smoke signal ready. Several rolls of toilet paper, several towels of various lengths. There is also boots for hiking, diving gear, rugged gloves, a vest with all sorts of pockets, and a backpack. In the medkit would be things like shots against malaria, morphine, sunlight protection cream and bandages, etc. I'd also find a raincoat.
There should be a radio I'd be trying to fix and a hand crank radio to see if I can listen in on anything.
Food from the boat would most likely be salted pork and dried beef, a sack of potatoes, and several cases of bottle water. Also some bottles of whiskey and brandy, but it is mostly for cleaning wounds than drinking myself drunk.
I'd find a first aid kit with the barest essentials that any boat would have.
Weapons, I'd have a Springfield XDM in 9mm with a surefire light attached, 2 spare magazines with a couple boxes of 100 rounds each, so that's 200 9mm hollow points. A Benelli M4 with at least 40 00-buck, 10 slugs, and a handful of bird shots also with a surefire light attachment. For a rifle, I'd have a Remington ACR, chambered in 6.8 Rem. 4 spare magazines and about 100 extra rounds plus an ACOG and a vertical grip/surefire light attachment. I would also have an weapons case where I can store my weapons I am not taking out and keep them airtight so I can keep the salty sea air from ruining them and always clean my weapons one at a time daily.
At first light, I'd start setting up traps for any wild life on the island, first with a perimeter around my base camp. I'd dig trenches around the area and start clearing out the trees surrounding my camp and bushes as much as possible to ensure if there are large predators, they would have less area to hide, the closer they approach my camp, so I'd also start making a fence compose of wooden spikes I'd fashion out of the local trees and try to make a rope alarm system.
Fresh water source would be a river within the island the empties into the ocean for easy access connect to a fresh water lake fairly close to my ship wreck so I can bath
Plant life would be coconuts, melons growing from trees, wild onions and edible mushrooms, not the kind that would send you on a drug trip.
Animal life would be wild hogs deeper inside, goats uphill and non-poisonous or large anaconda like snakes. No large spiders or poisonous spiders, various kinds of fishes and besides the wild hogs, no other large predators around. Also rabbits.
If I am lucky, there are natives on this island that I can befriend and mutually benefit with them.
I'd bring a ruggedized laptop with me and hook it up to the boat's power generator. The generator is also run by the containers of fuel I found and rationed. I'd most likely have several hundred gigabytes worth of entertainment on my laptop and also porn to stave off loneliness, unless there's that native tribe I can try to get myself a lady friend from.
All the while, I'd try to create a large SOS sign on the beach for people up high to see and smoke signals and try to keep a large bonfire as a signal and as a source of heat.