What quality is common among all of Ingersoll's positions held within the Navy?

Context: Stuart Howe Ingersoll was a vice admiral of the United States Navy. He was a naval aviator whose career included service as an aircraft carrier commander during World War II and tours as commander-in-chief of the United States Seventh Fleet, President of the Naval War College, and Commandant of Midshipmen at the United States Naval Academy.

Answer: Although Ingersoll held many positions within the U.S. Navy, he was first and foremost a naval aviator.