All systems go

Meaning

Everything is ready for action.

Usage

Used when preparations are complete and execution starts.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Aviation term indicating instruments report 'go' (ready).

Adopted into general speech during the space race and beyond.