U.S. Coast Guard Academy Cadets use an alidade to determine bearing aboard the Coast Guard Cutter Barque Eagle (WIX-327) in San Francisco Bay, July 25, 2025. Cadets spend several weeks aboard the Eagle, which serves as a classroom at sea to give all future officers a foundation in seamanship and life underway. (U.S. Coast Guard photo by Petty Officer 3rd Class Charlie Valor)