Rocks & mirror

Encyclopedia of Marine and Energy Technology

Shaft alignment sighting, sighting through


The process of establishing the reference line. The major welding work should be completed on the stern block of the vessel to prevent structural deformation which may result from excessive welding. The temperature of the vessel structure must be stable and as even as possible. For that reason, the operation is done at night to minimize the distortion of the hull due to diurnal temperature effects.

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