plural of universal instrument

plural of transit instrument

An astronomical telescope mounted in the meridian and turning on a fixed east-and-west axis.

plural of block instrument

(rail transport, UK) An instrument installed in a cabinet, used in block signalling installations.

(aviation) An airline selected by government to represent the country.

plural of chosen instrument

(UK, Canada, Australia, law) In some common law jurisdictions, a form of delegated legislation enacted under a power derived from an act of parliament.

plural of statutory instrument

plural of flight instrument