Submarines are locations from The Legend of Zelda: The Wind Waker. They appear on the Great Sea as floating, barrel-like devices, partially submerged under the ocean. Each submarine contains a chest, making them similar to the Hidden Holes found on land. Link must generally defeat all the enemies, which makes a ladder fall down so Link can access the chest. Additionally, a submarine's entrance is usually guarded by at least one raft carrying Bokoblins. On certain islands with submarines nearby, a man with a telescope known as Old Man Ho Ho can be seen observing them. There are a total of seven submarines in the Great Sea; a Submarine Chart which marks the location of each of these vessels can be found near the Boating Course.