supply of reverse reduction hydraulic gear box and twin screw single station control system supply of reverse reduction hydraulic gear box and twin screw single station control system for inland 27.5 m roro vessel, yard 805 of wbtc ltd. , 1) reverse reduction hydraulic gear box to be coupled with 240 bhp (appx) marine diesel engines for propulsion system of roro vessels complying brief technical requirement of niet under section b & c ratio: 3:1 engine speed: 1800 rpm quantity: 2 nos. [lh – 1 no. and rh – 1 no.] , twin screw single station control system with mechanical remote control from bridge (control cable – 32 meter long approx.). the control system should be compatible with main engine and gear box for proper functioning. quantity: 1 set