Bob Moore wrote:
George Ruch wrote


Operating frequencies dictate the size of the antenna array.
Compare this picture of a TACAN site at
http://en.wikipedia.org/wiki/TACAN with this one of a VOR site
at http://en.wikipedia.org/wiki/VOR.


Actually George, the first picture is a VORTAC, a TACAN and VOR
installation. The TACAN is just the round cylinder part and that
is what makes it so easy to mount onboard a ship.

Bob Moore

We used to carry a portable TACAN (TRN-41) in a backpack for
contingencies in the USAF. Didn't take long to set up and then align so
it could be used.
http://esc.hanscom.af.mil/esc-ga/Products/trn-41.htm
JPH