Re: radio link coverage
It would help if you clear a litle bit more about it.
1)Are you trying to create a "link" between two fixed
stations?
2) Or, Are you trying to create a coverage map of
fixed station (link Fixed to mobile)
In the first case, if the link is LOS you would need to
make sure it is LOS must of the time. so will need to
have fresnel clearance and make sure there is no
specular reflection due to sea water. You dont need
a "coverage" area.
In the second case, the free space loss does not aplies
since there is not clearance. In this case the equation
for losses is almost the same, just needs more att per
decade. And, you need a link budget, to account for Rayleigh,
log-normal fading. You will obtain an approximated distance for
coverage. For more precise "coverage" mapping you will
need topographic data and software to apply model as
Okumara-Hata, Cost231, Hikegami, Egli, etc.
Added after 4 minutes:
But, since you say is over sea water, I assuming you
dont need a coverage area since would be circular.
That is why is confusing.