[aprssig] APRS for a "ocean buoy"

[Jim Lux]

An acquaintance asked if there was decent APRS coverage along the 
coast of California, say out to 10-20 mi from the shoreline.  The 
transmitter would be pretty close to sea level (on a kayak, for 
instance).  30m HF is an option, but there was some uncertainty about 
what sort of antenna would be possible for that.

The alternatives are conventional satellite tracking (Argos, Orbcomm, 
Inmarsat D+)

Jim, W6RMK