Complex sentence: While in the area "Harvester" found and picked up survivors; 50 men from "William Gorgas" and 1 from "U- 444"; while attempting to re-join the convoy her engines failed, and she summoned "Aconit" for assistance.
Split into simpler sentences: While in the area, "Harvester" found and picked up 50 survivors from "William Gorgas" and 1 from "U- 444". While attempting to re-join the convoy her engines failed, and she summoned "Aconit" for assistance.