Tiger's trial speed and sea-going performance

How should Tiger's reported speed be interpreted?

Trial figures may exceed normal sea-going performance, so tactical planning should use the speed expected in service.

Extra installed power could produce impressive trials, particularly when designers allowed margin for weight growth during construction. Trial speed, design speed, and normal sea-going performance are related figures, but they are not interchangeable. An admiral should plan around the speed expected in service rather than the most favourable recorded run. The distinction matters whenever published trial figures are used to infer tactical performance.