'Out at sea' past a 50 mile line, communication is very slow and very expensive. Some exceptions, there is free email with a ham license, non-commercial and certainly no images, A single sideband HF transceiver and modem is 1-2k$, think 9600 baud in optimum conditions. Within a mile of the shore of any industrialized nation, standard wifi is supposed to be pretty available. The boat in the picture is not getting too far offshore with one neophyte and one cat.