Which document contains detailed information about burial at sea?

The correct answer is A. The Navy Military Funerals NAVPERS 15555 document provides specific guidelines and detailed procedures related to military funerals, including burial at sea. This document outlines the eligibility criteria, the process for arranging a burial at sea, and the ceremonial aspects that should be adhered to during the service. It ensures that the proper respect and honors are given in accordance with Navy standards, making it the authoritative source for such matters.

The other options do not focus on burial at sea. OPNAVINST 4790.4 deals with maintenance and material management and does not cover funeral services. The Marine Corps Manual focuses on organizational structure, policies, and procedures relevant to the Marine Corps. Navy Regulations does provide guidelines for various Navy operations but is more of a general regulatory framework rather than a focused document on military funerals or burial at sea.