"Robert11" wrote in message
. ..
Hi,

Not very knowledgeable at all re antennas, but let me ask the following,
please.

Would like to try a Yagi for up in my attic to hopefully receive maritime
comms from the harbor, about 20 miles away, on my scanner (receive only
usage).

snip

Much thanks,
Bob



CAUTION: If you buy/build/borrow a yagi, please note that the marine band
signals will be vertically polarized. Mount the yagi with the elements
up-and-down, not side-to-side, like a TV antenna. Having the polarization
wrong will be like moving many miles away further from the harbor -- not
good.