TERCOM

Rarity: Common

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At a glance

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Invention

Domain

Science and technology

Knowledge cost

4

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What Wikipedia says

Terrain contour matching, or TERCOM, is a navigation system used primarily by cruise missiles. It uses a contour map of the terrain that is compared with measurements made during flight by an on-board radar altimeter.

Excerpt from the Wikipedia article “TERCOM”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: U.S. Navy derivative work: The High Fin Sperm Whale, Public domain, via Wikimedia Commons.