relative square search

relative square search

[′rel·əd·iv ′skwer ‚sərch]
(navigation)
Search by a series of course lines such as to produce relative movement lines of increasing length, each change of course being such as to produce a change of 90° in the direction of relative movement, all changes being in the same direction (right or left), so that the pattern of the search is an expanding square relative to a moving point.
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