Asan Cut is Guam's classic cut-through-the-reef shore dive: hard coral outcrops and rock columns framing a sandy channel with enough relief to keep the route interesting. The open-water side can pull you toward deeper water, while the entry side is the real challenge. It is best suited to confident divers who can manage a surf-sensitive beach entry, read the current, and stay close to the site on the way in and out. Once through the cut, the reef pays off with a mix of fish, wreck history, and a more open run toward the outside.