NavigationComputations
1 in 60 Rule
The 1 in 60 rule is a mental dead reckoning rule of thumb stating that a 1° track error over a distance of 60 nautical miles (NM) will result in an aircraft being approximately 1 NM off track. It is used extensively by pilots for in-flight navigational problem-solving and calculating heading alterations.
Key Points
- •Assumes 1° of error equals 1 NM off track per 60 NM travelled.
- •Used to quickly calculate track error (TE) and closing angle (CA).
- •Requires knowing both the distance gone and the distance remaining to the destination.
Exam Relevance
Frequently tested in practical navigation scenarios requiring pilots to mentally calculate heading alterations to regain a planned track or fly direct to a destination.
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