I use WiFi wherever it can. To write my blog, upload sailing photos and videos, looking weather forecast and regatta information. On the sea, only option is to use GPRS/3G/3,5G, but in most small ports there is free wifi at least in Finland, Sweden and Estonia. Problem is, that yacht is away from WiFi base station and signal is weak or none.
hField technology has handy small USB device, called Wi-Fire, amplifying WiFi signal. The WiFi antenna will provide higher speeds at low signal strengths than your typical internal WiFi adapter. It has even beat Draft802.11n products in range and speed at long distances, up to 300 meters.
hField is connected to computer via USB and requires to install driver and wireless manager. It costs about U$ 60.