A brief discussion of why you need a radar reflector on your boat and what choices you have.
Radar reflectors with di-electric lenses which refocus and return radar pings.
An active radar target enhancer fires an amplified radar signal when it receives one, thus producing a stronger signal on the other radar screen than is possible with passive reflectors.
Brief grab bag of facts and commentary about the usefulness of radar detectors. Contains excerpts from hard-to-find bulletin board and newsgroup postings, as well as links to useful sites and vendor pages.
How well do radar reflectors work? Read this. It's a test of several products in different shapes, organized by West Marine in 1995. Visibility to radar varied tremendously by product as wall as by orientation.