sentences: "Probationary Midshipmen" or ""probies"" who pass this orientation & indoctrination trainings undertake an oath-taking ceremony at the end and are assigned serial numbers, given uniforms, and incorporated as Fourth Class Midshipmen.The curriculum involves both academics and military-style leadership and discipline, aimed at training marine officers to manage coastal and foreign trade, serve as shipping executives, port supervisors, and marine surveyors, and serve as naval officers in time of war or national emergency.