Complex sentence: The tail turret was given larger windows for better visibility, the Martin A- 3 top turret received a raised "high hat" dome, and the waist gunner positions were enclosed with plexiglas windows and offset to reduce mutual interference between the gunners during battle.
Split into simpler sentences: The tail turret was given larger windows for better visibility and the Martin A- 3 top turret received an enlarged "high hat" dome. The waist gunner positions were enclosed with plexiglas windows and offset to reduce mutual interference between the gunners during battle.