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GregS

In article . com, wrote:
Hello, I need to set up a communication link between a shore station
and a dive boat that is at most 30nm (50 km) distance from the
shorestation (the shore station is on the beach i.e. there are no
obstacles between shore and ship)

Can somebody advice me if it is possible to do this with for exemple
2 Uniden Oceanus DSC VHF radioos and two 6 feet 6dB antennas? The Top
of the antenna would be about 16 feet aove sealevel on the boat and
about 30 feet on the shorestation?

Is there a better solution to assure the communiication . The radios
would be need for emergency cases)

Thanx fopr any input

Standard distances suggest up to 111 kM for high antennas and high
power. I don't know whats legal for your shore station. I think
a 100 foot twin stacked yagis might work. I would use it only for backup.
If the boat moves, then a tall vertical is going to be iffy.
I don't have direct experiance, so test runs are mandantory.

greg