Final answer:
Non-judicial punishment (NJP) at a commanding officer's discretion for an E-4 onboard a ship may include reduction in rank, restriction, extra duties, forfeiture of pay, or confinement on bread and water.
Step-by-step explanation:
The question pertains to non-judicial punishment (NJP) in a military context, specifically within the Navy. At a commanding officers NJP, often referred to as captain's mast or admiral's mast aboard ships, certain punishments can be awarded to enlisted personnel, like an E-4 (Petty Officer Third Class). The Uniform Code of Military Justice (UCMJ) grants commanding officers the authority to impose a range of disciplinary actions without a formal court-martial. For an E-4 aboard ship, these consequences might include reduction in rank, restriction to certain areas of the ship, extra duties, forfeiture of pay, or confinement on bread and water for up to three days. The extent and type of punishment are influenced by the individual's service record, the seriousness of the offense, and the discretion of the commanding officer.