The Full Form of NJP is Non-judicial punishment.

If you’re a Marine, you may know non-judicial punishments as “office hours.” For sailors, they use the terms “captain’s mast” or just “mast.” Those in the Army or Air Force refer to non-judicial punishments as an “Article 15.” No matter what branch of service you’re in, you likely know that a commanding officer may administratively discipline troops for minor offenses.

A NJP is a procedure in which the commanding officer or officer in charge may:

• Make inquiry into the facts surrounding minor offenses allegedly committed by a member of his command;
• Afford the accused a hearing as to such offenses; and
• Dispose of such charges by dismissing them, imposing punishment under the provisions of Article 15, or referring the case to a court-martial.

Thus a NJP is not a trial or a conviction and, if punishments are not carried out, not an acquittal.