Department of Defense 🇺🇸 @DeptofDefense
Eyes on the horizon. A @USNavy petty officer uses a stadimeter aboard #USSTheodoreRoosevelt. A stadimeter estimates the range to an object by measuring the angle between the top and bottom of the object. Stadimeters have been used by the Navy since 1895. #KnowYourMil https://t.co/xV2WmPT7W4 — PolitiTweet.org