Lt. Jennifer Knapp, an aerospace experimental psychologist and former naval flight officer, sits for head measurements by anthropometry scientist Lori Brattin Basham of the Naval Air Warfare Center Aircraft Division at Naval Air Station Patuxent River, Maryland. Knapp is the military liaison helping lead the Navy's first comprehensive study since 1964 to update aviator size requirements, and Brattin Basham is the principal investigator spearheading the study. Brattin Basham and her human systems engineering team aim to gather a series of 32 measurements from more than 4,000 active aircrew across the Naval Aviation community through the end of 2023. (U.S. Navy photo by Chuck Regner)