(aviation) While flying under visual flight rules, finding one's own route without formal reliance on navigation aids, defined fixes, or the like.

Misspelling of unidirectional.

Alternative spelling of multidirectional

Alternative spelling of bidirectional

Alternative form of codirection

Alternative form of business-to-consumer

Alternative form of codirect.

(aviation, law) A regulation issued by the civil aviation authority of a country or region, generally in response to the discovery of an unsafe condition affecting particular aircraft, requiring that certain actions (such as specified modifications or enhanced maintenance or inspection requirements) be performed on these aircraft in order for them to remain legally airworthy.

plural of airworthiness directive

Focused on reaching a particular objective or serving a particular purpose.