Christiansen continued to carry out reconnaissance, rescue, and bombing missions, such that by December 1917, he had completed 440 missions, including shooting down Airship C27.
クリスチャンセンは、1917年12月まで偵察、救難、爆撃任務に出撃し続け、飛行船C27撃墜を含める計440回の出撃をした。