The system is used for hauling up motors. For example... we 'rigged' 51 points plus 6 'inverts'. The 51 points were simple... the motor remains on the deck and the chain (with the hook secured to a loop of cable) is hauled up (100 feet) and a steel pipe is placed and secured through the loop of cable. No 'gear' other than the rope we use to pull. One guys pulls the second places pipe.

The 'inverts' are the same motors BUT the MOTOR is hauled up instead. The motors we hung the other day were One Ton motors. The motors are where we use the pulley and 'ascender'. Motor weight (VERY ROUGH WEIGHT) can be 150-300 lbs (too many companies make too many to give a good weight). The pulley/belay device is hung from an overhead beam. Rope is dropped to deck and the working end is dropped to the grid (we are standing on) to another pulley to allow 4-6 people to haul the line at about waist level. Similar cable loop is on the top of motor and the pipe is placed through that.