I was forewarned by a local Chamorran resident not to dive here. Apparently, several US military folks were swept out to sea through the 'cut' during a period of large waves. If that isn't enough to deter you (it wasn't for me)...enter the parking lot just to the right of the National park, and park at the end of the lot on the right (facing the water). Gear up, then hike (on a really calm day, when the fishermen are standing in the water at the edge of the cut) over the really shallow (1-2' deep) reef to the edge of the cut. Do a quasi-giant stride, then you're in the 'cut' or channel...and swim on out to sea. The entry and exit are a lot of work, even on a calm day, in the hot and humid Guam weather! Interesting dive, and I'd probably do it again if I lived there!