Expressed wishes or desires of a military senior, by tradition, are tantamount to an order to a junior. If the officer is occupied, do not interrupt. When recognized, request permission to enter, assume the position of attention, give the appropriate greeting of the day, and state your business. Remain at attention until directed otherwise. When dismissed, come to attention, give the appropriate greeting of the day, and march out.
Military courtesy extends to the classroom.
When the instructor enters the classroom, the section leader will call the class to attention unless ordered by the instructor not to do so. Midshipmen will remain standing until the instructor gives the order to be seated. Midshipmen who are late for class will quietly take the nearest vacant seat, and will explain their tardiness to the instructor immediately after class. While etiquette is not a matter of Navy Regulations, it must be recognized that officers are judged not only by professional ability, but also by their manners in social and official life. An officer is expected to exercise tact and possess social poise.