FOR nearly three decades, I’ve felt conflicted about presidential salutes. After all, my United States Marine Corps instructors drilled into me the idea that “you never salute without a cover” which, in civilian, meant without a hat.

My fellow Marines and I were also informed, in no uncertain terms, that we weren’t to salute out of uniform. (I don’t think that presidential blue suits, white shirts and red ties quite qualify.) So whenever I saw a president stepping off a helicopter and bringing hand to brow, my drill instructor’s unambiguous words came back to me with much of their original force.

Image President Obama at Dover Air Force Base in Delaware, Oct. 29, 2009. Credit... Pablo Martinez Monsivais/Associated Press

Then there were the salutes themselves, which ranged from halfhearted to jaunty. None of them fulfilled the characteristically succinct prescription that Capt. Jack O’Donnell of the Marine Corps delivered, in 1963, to my platoon of freshly minted second lieutenants at basic school in Quantico, Va.: “Your salute,” he pronounced, “must be impeccable,” by which we took him to mean like his: a straight line running from elbow to fingertips, the fingers and thumb forming a seamless whole, the arm brought swiftly to the brim of the cap, no palm showing, and then lowered smartly to the side.