134. As a chief engineer on a motor vessel in a shipyard undergoing extensive repairs/modifications or being repaired after a significant grounding, what factors would you consider paramount to ensure the main engine and line shafting are properly aligned?

Proper alignment after repairs or grounding is confirmed by verifying crankshaft deflections are within limits and main shaft bearing reactions match design specifications; these measurements directly indicate the engine's straightness and load distribution, surpassing the significance of bolt tightness, clearances, or shipyard readings.