The Compound Unit was developed for two-station applications and for use on compound engine arrangements. on two station applications, long cables sometimes require the use of 40 series cable from the wheelhouse to the engine room, but many in-board out-board engines are designed for connection to 30-series cable. The compound unit can be installed just below the wheelhouse floor. Both stations are connected to it with a 30 or 40 series cable which runs to the clutch throttle. On compound engine installations, the control cable runs into the Compound Unit and two cables lead away to the seperate engine throttles.