"ps" wrote
Its not a wide angle lens. They are at varying heights. From the
responses I guess this must be some sort of tracking system for marine
mammal research. Whales, seals, etc. Don't know for sure.

Probably vhf, but the clumsiest looking RDF setup I ever saw.

From http://www.ucsc.edu/currents/01-02/10-08/otters.html
sea otters join conservation research project at Long Marine Lab

About 40 wild sea otters have been outfitted with radio transmitters and
temperature monitors.