There's a simpler method than the two Early Wrecked Ship Break-in methods described. Do the first Shinespark as shown in the lower alternate video, except trigger it before you go through the door. You'll sail to the right through the door, over the water and get the missile, then end up at the next (closed) door. Open this door but don't go through it, then walk to the left of the ledge as far as you can, then start a quick charge Shinespark. You'll run through the door to the right, then start flashing just before you fall off into the water on the right. Then you can walk left a bit, and trigger it to the right, ending up at the door to the Wrecked Ship.
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