What publication provides instructions for flags, pennants, and customs?

The correct answer is NTP-13, which is the publication that specifically covers instructions for flags, pennants, and customs. This document outlines the proper procedures and protocols for the display and usage of flags and pennants, which are essential for communication at sea and signify respect for nautical customs.

Understanding the significance of NTP-13 is crucial for anyone serving in a maritime environment, as it not only helps in fostering clear communication but also in adhering to international maritime traditions and protocols. By following the guidelines provided in this publication, personnel can ensure that they are in compliance with the established naval customs and contribute to the professionalism of naval operations.