Advice on Diving in Northern Mariana Islands

...oul, and Tokyo.  A few flights from Japan fly directly to Rota and Tinian, but most travelers fly into Saipan first and take one of several daily flights to the other two islands.  There is a ferryboat operated by the Tinian Dynasty Hotel and Casino that goes between Saipan and Tinian.  Otherwise it is necessary to fly between islands or make private arrangements to get there by boat.  Tinian is a 45-minute boat ride from Saipan, so some operators on Saipan may dive the sites on Tinian.  Otherwise the best way to dive all three islands is to go to each island and dive with a shop on that spec...