This manual, OPNAV M-5102.1 MCO 5100.29C VOL 9 Navy and Marine Corps Safety Investigation and Reporting Manual September 2021, implements the policy set forth in the Office of Chief of Naval Operations Instruction (OPNAVINST) 5102.1E for the U.S. Navy. This Marine Corps Order (MCO) is also a policy manual for the U.S. Marine Corps. The manual provides more detail for mishap, hazard (including near miss) and incident notification, investigation, reporting and record keeping by all Navy and Marine Corps commands, activities, units, installations and facilities, except for mishaps, hazards (including near misses) and safety incidents that involve a defined naval aircraft.

The Department of Defense Instruction (DoDI) 6055.07 of 6 June 2011 and the Secretary of the Navy Instruction (SECNAVINST) 5100.10L, direct the Department of the Navy (DON) to establish policies and procedures for mishap investigations and record keeping.

This manual implements the DON policies as directed by both Department of Defense (DoD) and Secretary of the Navy (SECNAV) policies. The techniques, procedures and best practices (i.e., the how) for safety investigations and reporting on procedures for implementing the policies contained in this manual will be published in a guide that will be managed separately by the Commander, Naval Safety Center (COMNAVSAFECEN). The title of the guide is "The Navy and Marine Corps Safety Investigations and Reporting Guide." COMNAVSAFECEN will announce the availability of the guide and future revisions of the guide by ALSAFE message.

This manual is its first issuance and therefore should be reviewed in its entirety.

This manual was developed to be the primary safety investigation and reporting policy for all
Navy and Marine Corps activities, commands, personnel and contractors (i.e., the latter only
when under the direct supervision of U.S. Government personnel). Due to the many unique and
specific situations associated with aviation-related events (i.e., excluding aviation ordnance),
these particular events will be handled under OPNAVINST 3750.6S and OPNAVINST 4790.2J.

The Risk Management Information (RMI) program of record database application is required for
reporting, recording and analyzing all mishaps, hazards (including near misses) and incidents.