NAVSEA is currently looking at alternative three-dimensional measurement systems for submarine and aircraft carrier main propulsion shaft and inboard coupling taper inspections. The current system, which consists of ring and plug gages, is unwieldy and is expensive in terms of manpower, time, procurement, and refurbishment costs. NAVSEA has tested two systems so far, a laser system and a photogrammetry system. Based on the evaluation of the data thus far, the laser system is incapable of capturing small surface irregularities as the gages of the current system. The photogrammetry system is still being evaluated.

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