Are affordable satellite telephones available yet to the boater?
They are beginning to become available. For example Inmarsat, the only service provider recognized by the International Maritime Organization for providing a recognized worldwide satellite safety communications service, now offers a low cost Mini M service popular on small vessels. Mini M coverage is however limited to Inmarsat spot beams from the newly-launched Inmarsat III satellites. Other mobile satellite services are or will soon be available to the mariner as well.