Crossover is a boat-access wall-and-slope dive near Kri where the reef runs like a moving corridor of coral, fish, and shark action. The site is best handled as a timed current dive: divers drop onto the structure, hold a compact line, and let the wall, corners, and fish schools shape the route. It rewards steady buoyancy and a guide who knows when the high-tide window is right, because the reef can shift from relaxed to energetic very quickly.