Soehanah rig has type jackup rig, with 3 pieces of triangular leg. Each leg is driven by 18 electric motor with transmission power through a few gears that are connected to the third pillar in the corner of the leg. When this rig changed position, the legs lifted up so that the body can rig floats on the water. Rig move pulled by tugs. When rig will occupy that position has been determined, then the legs lowered to the seabed to the rig body eventually be lifted above the water at a given altitude (water gap). During the process of raising and lowering the legs of the rig, the rig body balance must be kept (roll and trim). This is done by monitoring the movement of the three legs when rising and when falling.
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