MILPERSMAN 1620 Decoded: Navy NJP, the Vessel Exception, and What Actually Goes in Your Record
Navy NJP — Captain's Mast — differs from Army Article 15 in two ways that matter. Record filing is discretionary, not automatic. And the right to refuse doesn't exist if you're serving aboard a vessel. Know both before you walk into that room.
How Navy NJP Differs from Army Article 15
Both Army and Navy NJP derive from Article 15 of the UCMJ. The underlying statute is the same. The service-specific implementation — procedures, record-filing rules, and the scope of the right to refuse — is where significant differences emerge.
Army Article 15
- —Called "Article 15" or informally "Non-Judicial Punishment"
- —Record of NJP filed in soldier's official record by regulation when DA Form 2627 is imposed
- —Right to refuse NJP in favor of court-martial applies universally to E-5 and above (no vessel exception in Army context)
- —Formal reading of rights to service member before proceeding
Navy Captain's Mast
- —Called "Captain's Mast" (enlisted/junior officers) or "Admiral's Mast" (senior personnel)
- —Record filing in OMPF is discretionary — CO decides whether to file
- —Right to refuse NJP does NOT apply when attached to or embarked in a vessel
- —Character evidence and mitigation carry significant weight in CO discretion
The two distinctions that matter most in practice: (1) whether the NJP record gets filed in your OMPF is not automatic — ask your JAG whether the CO intends to file and what that means for your career; and (2) if you are serving aboard a vessel or in a deployed sea-going status, the right to refuse Mast and demand court-martial may not be available to you. These differences shape the entire strategic calculus around how to approach Mast.
The Vessel Exception — The Most Important Navy-Specific Rule
Under UCMJ Article 15(a), a commanding officer may not impose NJP on any member who, before the imposition of NJP, demands trial by court-martial in lieu of Article 15 proceedings — except when the member is attached to or embarked in a vessel. The vessel exception has been interpreted broadly. It applies not only to sailors literally aboard a ship but to those in deployed sea-going status attached to a ship or aviation squadron embarked on a carrier.
Right to refuse Mast available. E-5 and above may demand court-martial.
Vessel exception applies. Right to refuse may not be available. CO may impose NJP regardless of demand for court-martial.
Vessel exception likely applies. Attachment to a vessel — not just being at sea — is the trigger under most interpretations.
Vessel exception applies. Embarked status on a vessel is sufficient.
If you are uncertain whether the vessel exception applies to your situation, consult RLSO before Mast. The question of whether the exception applies is itself a legal question — not one to resolve through command guidance.
Maximum Punishments at Captain's Mast
Punishments at NJP are capped by the UCMJ and implementing regulations. The CO cannot exceed these maximums regardless of the severity of the alleged conduct. Punishments may be imposed in combination, but the combination cannot exceed the maximum for each individual type.
Forfeiture of Pay
Maximum: Up to one-half month's pay per month for two months
Applies to all enlisted grades. The pay forfeiture calculation is based on base pay only.
Reduction in Paygrade
Maximum: One grade reduction (E-4 and below only under standard CO authority)
E-5 reduction requires Flag Officer authority in most cases. Not all COs have authority to reduce above E-4. If you are being reduced above E-4, verify the CO's authority.
Restriction
Maximum: Up to 60 days to specified limits
Restriction limits your movement but does not reduce your pay.
Extra Duties
Maximum: Up to 45 days
May not exceed the duty limitations for your paygrade.
Correctional Custody
Maximum: Up to 30 days (E-3 and below only)
Not available for E-4 and above under standard NJP proceedings.
Reprimand
Maximum: Written or verbal
A punitive reprimand may be filed in the OMPF at CO discretion. An admonition is less severe. Ask JAG which is being imposed and whether it is going in your record.
What Goes in Your Record — The Discretionary Filing Rule
In the Navy, the Commanding Officer has discretion over whether to file the record of NJP proceedings in the sailor's Official Military Personnel File (OMPF). This is a critical distinction from Army practice, where DA Form 2627 is filed by regulatory default.
Before leaving the Mast room, you should know: (1) whether a punitive letter or record of the NJP is being filed in your OMPF, and (2) if so, what specific document is being filed. Ask your JAG this question explicitly before Mast.
Filed in OMPF
- —Affects promotion board visibility
- —Follows you to new commands
- —Visible during re-enlistment screening
- —Accessible in security clearance investigations
CO must notify you. You are entitled to know what document is being filed.
Not Filed in OMPF
- —Does not appear in promotion board records
- —Remains in command records only
- —May still be reported to BUPERS in certain cases
- —Creates conduct marker in local command files
Still documented. Still part of your conduct history at that command.
- ✗"This will be in your permanent record." — Ask for specific clarification: Is a document being filed in the OMPF? What specific document? What does it say? Do not accept vague statements about permanence.
- ✗"You're lucky to get Mast instead of going to court-martial." — This framing is designed to discourage you from asserting rights. Whether Mast or court-martial is better for you is a legal analysis, not a command decision. Consult RLSO.
The Appeal Process
An appeal of Mast punishment goes to the next superior in the chain of command. It is not a re-trial — it is a review of whether the punishment was appropriate given the conduct and the record. The reviewing authority can reduce or set aside; they cannot increase what was imposed.
File your appeal within 5 working days of the date punishment was imposed. Missing this window forfeits the right.
Any punishment involving correctional custody or restriction is automatically stayed pending the appeal decision. Other punishments (pay forfeiture, reduction, extra duty) typically continue during the appeal.
The reviewing authority receives your written appeal and the record of the NJP proceedings. Present your strongest arguments: disproportionate punishment relative to the offense, mitigating circumstances not fully presented at Mast, procedural errors in the proceeding.
The reviewing authority may set aside or reduce any part of the punishment, or approve it in full. They cannot impose additional punishment.
Preparing for Mast
Captain's Mast is not a court proceeding, but it is a consequential one. The CO has wide discretion. How you present matters. What documentation you bring matters. Consulting RLSO before you appear matters most of all.
Contact RLSO Before Mast — Not After
A JAG attorney can assess the evidence, advise on whether the alleged conduct constitutes a UCMJ violation, advise on the right to refuse Mast (if available), prepare you to present mitigation effectively, and advise on record-filing implications. None of this can be undone after the proceeding. Use RLSO before you walk in.
Assemble Your Performance Documentation
Bring copies of your most recent evaluations, any awards, letters of commendation, and certificates. The CO weighs punishment against your overall service record. A strong record with a documented aberration is treated differently from a marginal performer with a pattern of problems. Make your record visible.
Prepare Character Statements
Written statements from supervisors, peers, and leaders who can attest to your character, work ethic, and value to the command carry genuine weight in CO discretion. These are not perfunctory forms — they should be specific, first-person accounts from people who know your performance directly.
Understand the Mitigation You Will Present
Mitigation is not making excuses. It is giving the CO the full context that should inform the punishment decision: contributing circumstances, what has changed since the incident, the effect of specific punishment on your family, and your understanding of the impact of your conduct. Be direct. Be specific. JAG can help you frame this effectively.
Know What's Going in Your Record Before You Leave
Before leaving Mast, confirm with JAG: Is anything being filed in your OMPF? If so, what specific document? If a punitive reprimand is being filed, you need to know — that document affects your career in ways that are distinct from the immediate punishment.
Frequently Asked Questions
The questions that come up most — answered directly.
Can I refuse Captain's Mast?
Yes — but only if you are not attached to or serving aboard a vessel. Sailors E-5 and above who are not in a vessel status may demand trial by court-martial instead of accepting NJP. This right mirrors the Army Article 15 right of refusal. However, the vessel exception is significant and has been interpreted broadly: if you are deployed or attached to a ship or aviation squadron embarked aboard a vessel, you may not be able to refuse. Consult RLSO before making this decision — refusing Mast and going to court-martial is a consequential choice that requires full legal analysis.
What is the vessel exception and why does it matter?
Article 15(a) of the UCMJ prohibits commanding officers from imposing NJP on sailors who demand trial by court-martial — except when the sailor is attached to or embarked in a vessel. This exception exists because the Navy determined that maintaining discipline aboard a deployed ship requires immediate command authority without the delays of court-martial proceedings. In practice, this means sailors in a deployed, sea-going status may face Mast without the right to demand court-martial. The exception has been interpreted broadly by military courts to include being in a deployed theater while technically attached to a ship.
Will Captain's Mast go in my official record?
Not automatically — and this is a critical distinction from Army Article 15. In the Navy, the Commanding Officer has discretion about whether to file the record of NJP proceedings in your official Military Personnel Record Jacket (OMPF). If the CO elects not to file in the OMPF, the NJP still creates a conduct marker in command records and may be reported to BUPERS in certain circumstances, but it does not follow you in your personnel file in the same way. Before Mast, consult JAG and ask explicitly: 'Will a record of this Mast be filed in my OMPF?' The answer to that question significantly affects how consequential the proceeding is for your career.
What are the maximum punishments I can receive at Captain's Mast?
For E-5 and below, maximum punishments include: forfeiture of up to one-half month's pay per month for two months; reduction in paygrade by one grade (E-4 and below only, without additional authority); restriction to specified limits for up to 60 days; extra duties for up to 45 days; correctional custody for up to 30 days (E-3 and below); and a written or oral reprimand. Punishments cannot be combined beyond the regulatory maximums, and not all punishments can be imposed simultaneously.
Can I appeal the outcome of Captain's Mast?
Yes. You have 5 working days from the date of punishment to appeal to the next superior in command. If your appeal includes correctional custody or restriction, that punishment is automatically stayed pending the appeal decision. The reviewing authority can set aside or reduce any punishment — they cannot increase it. Appeals are not guaranteed to succeed, but they are a procedural right worth exercising if you believe the punishment was unjust or disproportionate. JAG can help draft an appeal that addresses the specific grounds most likely to succeed with the reviewing authority.
What should I do to prepare before Captain's Mast?
Consult RLSO/NLSO before Mast, not after. A JAG attorney can: review the evidence against you, identify whether the alleged conduct actually constitutes a violation of the applicable UCMJ article, advise you whether to accept Mast or demand court-martial (if the right is available), prepare you to present mitigation effectively, and advise on whether the CO is likely to file the record in your OMPF. Bring your performance documentation — evaluations, awards, letters of commendation, and character statements. The CO has wide discretion at Mast, and evidence of your service record and character genuinely influences that discretion.
Does a Navy NJP create a criminal record?
No. NJP is a non-judicial proceeding — it is not a criminal conviction and does not create a federal criminal record. However, the NJP proceeding and any associated punishment may be documented in command records and potentially in your OMPF if the CO elects to file. NJP history can appear in federal background investigations (particularly for security clearances) and may be reflected in personnel files that are reviewed during federal employment suitability determinations. The distinction between NJP and a criminal conviction matters in civilian courts and employment contexts, but the adverse career effects of documented NJP history should not be minimized.
What happens if I refuse Mast and go to court-martial?
If you successfully invoke the right to demand court-martial (and you are not in vessel status), the charges go to the convening authority who decides whether to prefer court-martial charges. The convening authority may: prefer charges and proceed with court-martial, dismiss the matter entirely, or handle it informally through command channels. Going to court-martial is not automatically worse than accepting Mast — in some cases, the government's evidence is weak and court-martial results in acquittal. In other cases, the court-martial results in a worse outcome including a punitive discharge. This decision requires full legal analysis with RLSO counsel before invoking the right.
This analysis provides general educational information about Navy NJP under MILPERSMAN 1620 and UCMJ Article 15 only. It is not legal advice and does not establish an attorney-client relationship. Military regulations are periodically revised — always verify citations against the current edition. If you are facing NJP proceedings, contact your nearest Region Legal Service Office (RLSO) or Naval Legal Service Office (NLSO) before the proceeding. Source: MILPERSMAN Article 1620, UCMJ Article 15, Manual for Courts-Martial.