Advice on Diving in Northern Mariana Islands

...here are three paved airport runways in the CNMI: Saipan International Airport (SPN), Rota International Airport (ROP), and Tinian International Airport (TIQ).  Most flights go into Saipan from Guam, Seoul, 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 i...