The target's 25.6-knot top speed sets the pursuing formation's pace. Reducing the British line to 27 knots preserves a small closure rate, so the enemy stays within reach while the pursuers avoid the accuracy penalty of maximum speed. The decision links speed intelligence directly to fire-control performance and pursuit geometry. A fleet commander can spend excess speed margin on steadier gunnery instead of chasing at full power.
Notable Point · 17:47-18:06
Speed margin trades closure for gunnery accuracy
A fleeing ship's 25.6-knot ceiling lets the British line slow to 27 knots, keep closing, and improve its shooting accuracy.