HF Surface-wave Extended Coastal Area Radar (SECAR)

A YouTube promotional video Surface-wave Extended Coastal Area Radar (SECAR) describes one use of HF radio for radar applications.

HF Surfacewave radar is growing in popularity and a number of companies are developing products.

Such systems are designed to be installed in coastal locations and can provide coverage out to several hundred km across the sea tracking both vessels and aircraft.

The video Surface-wave Extended Coastal Area Radar (SECAR) can be seen here:

How does HF-Radar work ?
http://ifmaxp1.ifm.zmaw.de/hf_radar.shtml

Information on HF Radar
http://ifmaxp1.ifm.zmaw.de/

The Unique Nature of HF Radar
http://www.codar.com/intro_hf_radar.htm

PDF Search Engine
http://www.pdf-search-engine.com/radar-hf-coastal-wave--pdf.html

Coastal radar systems can show up clearly on Google Earth such as
http://tinyurl.com/dddahw