Dull, p. 87 Exeter was able to reach a speed of 26 knots Gill, p. 623 before the first hit on her detonated in her 'A', or forward, boiler room See Item #44 and #45 https://www.pacificwrecks.com/ships/hms/exeter/research/action-report-captain-gordon.pdf and catastrophically knocked out all power around 11:20.