In article ,
Bruce in Alaska wrote:

Morad 156HD's are actually an Endfeed 5/8 Wave with a matching element
built inside the aluminum 1/4 Wave ground sleeve. Mechanically, very
rugged, and electrically extreamly rugged. They are the most common
VHF Antenna used in the North Pacific, and Bearing Sea.

Thanks for mentioning the Morad antenna. I had never heard of it
before. It looks like an excellent antenna. Apparently it is
seldom sold in the recreational boat market.