seade laeva juhtimiseks ja manööverdamiseks, hoiab laeva kursil ja võimaldab tema liikumise suunda muuta
vahendite kompleks, mille abil pööratakse laeva liikumise ajal. Suure laeva rooliseadmesse kuuluvad roolimasin, mehaaniline või hüdrauliline rooliülekanne, rool ja juhtimisajam.
a steam, electric or hydraulic power machine used for working the rudder and having its valves or operating gear actuated by leads from the navigating bridge
the steering wheel, leads, steering machinery, and fittings by which the rudder is turned
3.the steering device, usually the steering wheel, which is actuated by the driver
... the stern shall be taken to include the watertight hull structure, transom, poop, trawl ramp and bulwark, but shall exclude safety rails, bumkins, propulsion machinery, rudders and steering gear, and divers' ladders and platforms.
