An operating manual accumulates amendments as equipment changes during a ship's service. A major refit that replaces engines, generators, control systems, or radars can require a substantial new edition while retaining useful parts of the earlier manual. Officers selected for this work may be more senior or bring experience from serving aboard the ship before its modernization. Familiarity with the old procedures helps them recognize what must change when the revised systems enter operation. Navies need a personnel pool that includes capable operators who can also document technical work clearly.
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Major refits require revised operating manuals
Replacing machinery, controls, or radars requires experienced crews to revise the procedures developed for the ship's earlier configuration.