Again, always keep it under 12 passengers + crew.. there are things to think about in many ways...
We have great sponsordeals with Intellian (satcom) Latency in the problem but new stuff seems to work ok..., we also have really good tech like 3G/4G. I can give you more info soon, we will start run trials soon..
We on coboat been studying this a long time, its all about wind directions and hurricane seasons. S.E. Asia is really good. I am happy to help out on this later, too much to work on for a few days now..
Remember that more than 12 passengers is considered a passenger ship and will make more harm than good. 12 + crew is ok =)