Scheer's usual call sign and the fleet itself were in different places. Because the commander changed call signs at sea, asking only about the familiar call sign could be read as evidence that the fleet had not sailed. Staffs therefore needed to ask for the broader operational picture instead of demanding an apparently precise but incomplete answer. The lesson connects intelligence interpretation directly to fleet readiness and timing at Jutland.
Notable Point · 36:00-38:32
Room 40, call signs, and the wrong intelligence question
A misleading report that Scheer's call sign remained in harbour illustrates how narrowly framed intelligence questions can produce operationally wrong conclusions.