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When the GPS failed, the crew resorted to ded reckoning to estimate their position.
See correct answer
When the GPS failed, the crew resorted to ded reckoning to estimate their position.
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Related words
ded reckoning
Noun
alt-of
alternative
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uncountable
Japanese Meaning
（航海の技法）推算航法、すなわち『dead reckoning』の別称
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