140+ Us Coast Guard Uniform Stock Photos, Pictures & Royalty Free Images iStock Us air force, Us coast guard officer, Us military Earlier this week, in preparation for Billet Night, Officer Candidates donned their Tropical Blue shirts (commonly known as Trops) for the first time during the program and traveled to the CDR Merle Dinner Dress Blue US Coast Guard Dinner Dress Blue Jacket worn by Commander Merle Smith Jr. National Museum of African American History and Culture Female Officer Dinner Dress Blue