When youΓÇÖre good and ready, head outside, pick up the Combat Armor, and destroy the Barracuda Sharks while youΓÇÖre still on dry land. Two rocket blasts should do it. Hop into the drink and swim toward the second small island with the hole in the middle (there are no power-ups in these waters so donΓÇÖt waste your time looking). Simply shoot at the red power fuse beside the blades to de-activate the fan, and either climb in between the blades or hop onto the platform and drop down the center hole.
