Multiple aircraft; planes and flying machines considered as individual units.
Plural of 'aircraft,' a 20th-century compound word that technically remains uncountable in formal English, though 'aircrafts' appears in specialized contexts referring to distinct types or models.
Interestingly, 'aircraft' is usually treated as both singular and plural (like 'sheep'), so 'aircrafts' is technically non-standard, yet pilots and engineers often use it when distinguishing between different aircraft models or specific planes.
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