Wheelhouse indicators are a three-face 270° panoramic type for mounting to overhead along with a series of port-starboard dial devices in different enclosures for recessing in console or fixing with bracket to console surface or bulkhead. All RAIs are regulated in illumination by a separate dimmer. The dial rudder angle indicator is available in three square sizes: 192 mm., 144 mm. and 96 mm. Rudder angle faceplates are available in three graduations: ±35°, ±45° and ±65°. The RAI system is fed with electrical power from its central connection and distribution unit.
All devices are robust in construction and are highly tolerant of vibration and shock.