Boat communication ship shore

Ship/Shore communications: 1) For roughly the first half mile or so a cell phone might work (depending on the towers in the area). 2) VHF radio is line-of-site and usually works for roughly 26 miles. (ship/ship and ship/shore) 3) HF radio will reach around the globe. (ship/ship and ship/shore) 4) Satellite phones work from roughly 80 degees North to 80 degrees South - realistically anywhere in the world that MOST tourists would go.