Original sentence: Her commander raised the periscope for only short periods, to avoid being seen by the destroyers and the Cants, while manoeuvring into an attack position.had been waiting since 10 August  north of the Capo Milazzo lighthouse and after being attacked, moved close to Stromboli, arriving early on 13 August
Edited sentence: (Lieutenant-Commander Alastair Mars) had been waiting since 10 August  north of the Capo Milazzo lighthouse and after being attacked, moved close to Stromboli, arriving early on 13 August.Mars raised the periscope for only short periods, to avoid being seen by the destroyers and the Cants, while manoeuvring into an attack position