http://www.sausalitowireless.com/

http://www.sausalitowireless.com/wirelsfaq.html

    Can I leave the yacht harbour and still have a signal?
    
    If leaving by boat, you can sail out into
    the bay halfway until Angel Island, and
    still have a signal strong enough to
    conduct even video conferencing.
    Alternatively, leaving by car or foot, you
    can access Sausalito Wireless in various
    locations along Bridgeway (Cafe Trieste or
    The Taco Shop for example).