What is the plural of spacecraft?

The plural of spacecraft is spacecraft.

Spacecraft is an invariant noun: the singular and plural are identical.

All forms of spacecraft

as a noun

base: spacecraft
plural: spacecraft

Spacecraft in a sentence

Seen from a spacecraft, the earth looks blue.al_ex_an_der
When on a spacewalk, astronauts use safety tethers to attach themselves to their spacecraft.Hybrid
Space walks, or extravehicular activities, allow astronauts to work outside their spacecraft.Igider