I have found NAV/COMM antennas are generally located at the rear of the
aircraft, about two feet in length. DME frequency is about 10 times
higher, so the antenna is 10 times smaller. Due to higher losses at
these frequencies, they are generally located near the front of the
fuselage. Most of the ones I have seen are shaped like a shark fin, but
I have also seen small stubby ones an inch or two in length. The ELT
antenna is easy to identify because it will be close to the ELT, and it
is shaped like a generic whip antenna. GPS antennas are also small
because of their high frequency of operation. They may look like a flat
disk, or a cone. Many GPS antennas have the manufacturer's logo on
them, so they are easy to identify. The marker beacon antenna looks
like a boat at the bottom fuselage, but I am sure there are other
variants. Glideslope antennas I have seen are shaped like shark fin,
V-shaped, or a horizontal wire inside the cockpit above the windshield.
If you look through any avionics catalog, I am sure you will find the
large variations of antennas out there.




Matt Whiting wrote:
Does anyone know of a site that shows the common types and locations of
airplane antennas? It seems like this would exist somewhere, but I've
yet to find the right combination of keywords to find anything with Google.

Matt