Walkthrough:The Legend of Zelda: The Wind Waker/Portal-Kombat/Part VI

Inaccessible Islands
After you get sailing, you should open up your Treasure Charts that you've discovered so far. This will make beams of light appear out of the ocean in the various areas where you've got a chart leading to treasure. However, your wallet is pretty much peaked out at the moment, so don't bother going after any treasure just yet. You'll soon encounter a strange new creature called Fishman, and he'll mark Dragon Roost Island on your Sea Chart. Unless you want to get lost at sea, you'd do well to throw All-Purpose Bait to any Fishmen you see hopping out of the water. There's one for every quadrant, so if you're consistent in this 100% walkthrough, know from now on that every time you go to a new island, you should get it charted before you move on to another. The first new island you'll come to is Fire Mountain, which is a powerful volcano. That being said, you can't set foot on the island without getting burned. The only thing you should do for now in this quadrant is sail over to the nearby sea platform. It's very easy to climb the ladder and defeat the easy little Pink Bokoblin at the top for the meager Rupee reward you get from the treasure chest. Once that's done, continue the journey south. The next island is Eastern Triangle Isle. If you opened your treasure charts like you were supposed to, you should notice a big shaft of light emanating from the waters around this island. Ignore the light; the treasure will only really be useful to you if you have space in your wallet. There's essentially nothing to do on this island for now, like Fire Mountain. Just continue south, avoiding the little updrafts which can spin you around a bit. If you notice a few attacking octopi (Sea Octoroks) just avoid them- you can't fight them with anything you have yet. The last island in your way to your destination is Bomb Island, which is, incidentally, shaped like a bomb. There's nothing you can really do on the island itself, but if you do go ashore you should meet Old Man Ho Ho. This traveling man always has his telescope and can spot mysterious things from far away. Talk to him and he'll mention something about "a container." Follow his telescope's gaze with your own and you should spot it: a submarine! Sail over to the submarine and climb aboard. Go through the entrance and you'll find yourself in a dingy living quarters for Bokoblins. There are a few Rupee-snatching Rats around here, so be on your guard. Even if you do get some stolen, your wallet will be full to the brim in no time anyways. Defeat the two Blue Bokoblins and the Green Bokoblin that stands guard at the end of the room to make a treasure chest appear. Open it up, and you'll find... an  Empty Bottle ! Now you can carry even more things with you! Leave the submarine and raid the nearby sea platform. Once you've done that, head south to reach the Forest Haven.