| 摘要 |
A method of protecting a ship from missiles with twocolour infra-red target seeking heads and which is characterised in that an interference transmitter disposed on the ship sends out exclusively short wave infra-red rays, at least intermittently, the strength of radiation from the interference transmitter being so adjusted that the ratio of short wave to medium wave infra-red radiation is so shifted that the ship cannot be reliably recognised as a target by the two-colour infra-red target seeking head.
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