Earlier admirals often carried their own signal systems, leaving ships to obtain a new book or maintain several incompatible versions. A standardized book allowed ships to assemble under different commanders without relearning basic command language. Keppel's position as First Lord and Howe's command of the Channel Fleet gave Kempenfelt's system institutional sponsors who could spread it beyond one admiral's squadron. This was an age-of-sail interoperability problem: common doctrine and codes reduced the delay and confusion involved in turning separate ships into one fleet.
Notable Point · 27:56-29:52
From admirals' private codes to a fleet standard
Kempenfelt, Keppel, and Lord Howe push toward a common signal book so ships can join a fleet ready to understand its orders.