Selling Stealth at Euronaval
The recent Bourget Euronaval exhibition included the now-standard quota of reduced-signature warship models, and Vosper-Thornycroft's Sea Wraith deserves special mention. The company believes that signature management, rather than signature reduction, should be the guiding factor. Thus the model's most striking feature is the pair of tower masts, sited asymmetrically and well separated.
A missile approaching broadside-on to such a ship sees little of the hull, but concentrates on the two sharp peaks of the masts. If the masts offer large enough radar reflectors (and if the hull reflection has been sufficiently reduced), the missile's automatic gain control (an anti-jamming measure) causes it to suppress any part of the hull that it sees. Both peaks are necessarily in the same range gate, so it cannot reject either; it sees "range glint" and cannot quite decide which is the target. Much the same can be said of the angle gate. The missile may well fly between the masts. At the least, because it is nodding back and forth between them, it may be easier for a countermeasure to capture.