You decided to first head to the lake, because of an item you were familiar with, and who it actually belonged to as you began searching the entire water for it. That item was the trident, and the only god you were familiar with that used a trident in battle was none other than Poseidon, the god of the ocean.
You spent the next couple of hours building a raft with spare logs you have found on the sand of the beach outside the waters of the lake, along with some string, a stick, and some palm tree leaves. Once you finished building the raft, you push it into the water, and then get on it, while also letting the wind push the sail made of palm tree leaves towards the middle of it. Just then, the wind stopped which left you stranded in the middle of the lake, without any hope of rescue.