VOLUME V (REVISION-D) (WITH CHANGE-5), JOINT FLEET MAINTENANCE MANUAL VOLUME V QUALITY MAINTENANCE

COMUSFLTFORCOMINST 4790.3 REV D CHG 3 07 Nov 2023 x 10.5 Motor Gasoline Assessment Program ......................................................................... VI-10-5 CHAPTER 11 - MAINTENANCE, REPAIR AND OVERHAUL OF SERVICE CRAFT, LANDING CRAFT AND SMALL BOATS 11.1 Purpose ........................................................................................................................ VI-11-1 11.2 Material Readiness ...................................................................................................... VI-11-1 11.3 Maintenance of Landing Craft and Small Boats Assigned to Afloat Units ................ VI-11-2 11.4 Landing Craft and Small Boat Repairs During Chief of Naval Operations Maintenance Availability ............................................................................................ VI-11-3 11.5 Maintenance of Service Craft, Landing Craft and Small Boats Assigned to Shore Activities, Group and Squadron Commanders ............................................................ VI-11-3 11.5.1 Unit Level Maintenance ................................................................................ VI-11-3 11.5.2 Fleet Maintenance Activity Level/Contractor Assist Maintenance .............. VI-11-4 11.5.3 Overhaul of Service/Landing Craft and Small Boats ................................... VI-11-4 11.6 Responsibilities ........................................................................................................... VI-11-5 11.6.1 Type Commander.......................................................................................... VI-11-5 11.6.2 Immediate Superior In Command ................................................................. VI-11-5 11.6.3 Commanding Officers of Parent Commands ................................................ VI-11-6 11.7 Repair and Overhaul of Small Boat Engines .............................................................. VI-11-6 11.8 Boat Alterations ........................................................................................................... VI-11-6 11.9 Operation of Small Boat Engines ................................................................................ VI-11-6 CHAPTER 12 - DEGAUSSING 12.1 Purpose ........................................................................................................................ VI-12-1 12.2 Degaussing Definitions ............................................................................................... VI-12-1 12.2.1 Check Ranging .............................................................................................. VI-12-1 12.2.2 Degaussing Folder ........................................................................................ VI-12-1 12.2.3 Degaussing System ....................................................................................... VI-12-1 12.2.4 Degaussing System Calibration .................................................................... VI-12-2 12.2.5 Deperming..................................................................................................... VI-12-2 12.2.6 Magnetic Compass Compensation ................................................................ VI-12-2 12.3 Surface Ships and Submarines With Degaussing Systems ......................................... VI-12-2 12.3.1 Check Ranging .............................................................................................. VI-12-3 12.3.2 Responsibilities ............................................................................................. VI-12-3 12.4 Submarines Without Installed Degaussing Systems ................................................... VI-12-4 12.4.1 Check Ranging .............................................................................................. VI-12-4 12.4.2 Responsibilities ............................................................................................. VI-12-5 12.5 Surface Ships Without Degaussing Systems ............................................................... VI-12-5 CHAPTER 13 - SURFACE SHIP CORROSION CONTROL

COMUSFLTFORCOMINST 4790.3 REV D CH 3 07 Nov 2023 VI-10-2 (approximately 1.4 to 7.6 percent by volume), forms an explosive mixture that can be set off by any ignition source such as a slight spark or flame. If liquid gasoline is present, the violent explosion will be followed by fire. b. Air, at ordinary atmospheric temperature, can absorb as much as 28 percent gasoline vapor. Gasoline vapors are three to five times heavier than air, and when released, will tend to sink to the lowest level of a compartment. Liquid gasoline will expand 0.7 percent for each ten-degree increase in temperature. 10.3 PERSONNEL HAZARDS. Gasoline and gasoline vapors are extremely toxic; breathing air that is rich in gasoline vapor can and has caused unconsciousness and in some cases death. Gasoline vapors, even in concentrations of less than 1.0 percent, may cause nausea and headaches if inhaled for any length of time. Strong concentrations of gasoline vapors produce an excited state leading to unconsciousness. Gasoline saturated clothing will cause irritation and severe burns to the skin and will ignite if exposed to a source of ignition. Gasoline splashed in the eyes can cause blindness. Severe physical and mental complications may result from inhalation or body absorption. Ship’s personnel must be instructed in the characteristics of MOGAS and the necessary precautions to prevent personnel injury by exposure to MOGAS or its vapor. 10.4 STORAGE AND HANDLING. 10.4.1 Drum and Bladders Conditions. Ships capable of carrying MOGAS in jettison racks or lockers, and ships that receive temporary installation of MOGAS jettison rack or locker systems, will maintain them in one of the following conditions at all times. a. Only Naval Sea Systems Command (NAVSEA) approved storage containers as specified in reference (a) and reference (c) shall be used. All MOGAS containers shall be inspected by ship personnel prior to storage in the MOGAS storage area. Any container that shows signs of wear, leakage, or weeping of fuel will be rejected. b. Empty bladders may be stacked on top of each other and stored in the MOGAS storage locker. Empty MOGAS containers contain enough residual gasoline liquid and vapors to support ignition or explosion. They will be treated with the same precautions as full containers. c. All fueling equipment (hand-driven pumps, hoses, faucets, etc.) should be stored on the MOGAS sponson or Air Department equipment locker. d. When in port, ensure the jettison rack(s) and jettison locker(s) are rendered safe (insert locking pins and stanchion). e. Reference (c) and reference (g) if a ssigned contain guidance on the handling of MOGAS and shall be reviewed by personnel prior to all MOGAS operations. All equipment used in these operations shall be kept clean and in good condition and shall be inspected frequently per Planned Maintenance System and current directives f. Fifty-five gallon st ainless steel drums, approved bladders and cans will be used to store MOGAS per reference (a), reference (h), section 172.101, and reference (i), section 147.45.

COMUSFLTFORCOMINST 4790.3 REV D CH 3 07 Nov 2023 VI-10-3 g. Inspect drums to be filled. Drums must be in good condition and have no structural damage. The drum cap must be intact with good gaskets and treads. Replace gaskets or caps if damaged. h. Inspect drum vents and faucets. Vents and faucets must be in good working order. i. Verify all portable bladders have been te sted and inspected. Inspect all cans or unit to be fueled. Reject any condition not suitable for MOGAS stowage or in poor condition. 10.4.2 Loading or Off-loading and Transferring a. References (f), and (g) provide amplifyi ng responsibilities and assigned actions for the safe and efficient on-load or off-load of 55-gallon drums of MOGAS from transport truck or to base Hazardous Material truck at the pier. b. USS ( SHIP) will on-load or off-load 55-gallon drums of MOGAS from transport truck or to base Hazardous Material truck on the pier, via Monorail chain fall system to or from MOGAS Storage Platform to or from on the specific date and time identified. The Division will be responsible for planning and coordinating the ship’s MOGAS (on-load and off-load) evolution at the pier reference (f). c. The ship’s Officer in Charge will be responsible for proposing a primary and alternate on-loading or off-loading plan and loading dates consistent with the ship’s availability by naval message directly to the appropriate manger identified for the ships homeport region. d. Smoking lamp and all hot work shall cease dur ing this evolution. Ship will on-load or off-load MOGAS only between sunrise and sunset. f. The Ships Fire party must be on station pr ior to the truck entering the pier and remain on station until the truck has departing the pier, Aqueous Film Forming Foam hoses must be manned at all times during on-load or off-load. g. Upon notification that a MOGAS evoluti on will occur, all personnel involved shall become thoroughly familiar with the evolution through training and indoctrination. h. Conduct a safety brief on the spec ific date and time identified on USS (SHIP) using reference (f) for all participating members delineated. Brief, mitigate, and implement controls for the hazards specified in the risk assessment. i. Give a minimum of 24 hours notifica tion to the Naval Base Environmental Department, Base Port Operations, and Base Fire Marshall of the ship’s plan to transfer MOGAS. j. Ensure effective communication via handhe ld radios is established between personnel stationed at the pier and MOGAS storage platform. k. Use of non-ferrous (spark-proof) tools. l. The Base Fire Marshal must be notified a nd ensure that all firefighting equipment is in position, the truck is grounded to the ship and to the water prior to the hose being placed on the ship.

COMUSFLTFORCOMINST 4790.3 REV D CH 3 07 Nov 2023 VI-10-4 m. Most MOGAS inventory requirements ar e controlled by the Landing Force Operating Reserve Material. They will make necessary arrangements for the delivery, pickup or crane assistance of the MOGAS. The ship will be responsible for requesting, by message, an on-load or off-load date and time, and an alternate date and time, for the evolution to commence. This message information will be provided to the local Naval Base Commander. n. In the event of a MOGAS spill, precautiona ry measures shall be taken to minimize the danger of a fuel spill by blocking the scupper, assuring the availability of adequate manpower, and having sufficient containment and cleanup equipment, such as the Navy oil spill control kit per reference (j). 10.4.3 Safe Handling of Motor Gasoline. a. Do not allow drums to be staged una ttended outside the dedicated MOGAS storage area b. Do not allow MOGAS to set staged in hangar bay, sponson, mission deck, or elevator for more time than absolutely necessary. Overnight would be unacceptable. c. Hold frequent firefighting drills, w ith particular emphasis on the MOGAS jettison system. d. Immediately clean up any spilled or leaked gasoline and dispose of any rags or other cleanup material per ship’s instructions. e. Gasoline must not be used for cleaning purposes under any circumstances. f. Conduct frequent inspections to en sure system integrity and tightness. 10.4.4 Containerized Motor Gasoline. Gasoline shall be stowed in portable containers aboard ship in a manner in which they may be jettisoned overboard in the event of an emergency. Portable containers may be stowed on a rack, ramp, or grated deck, where when the release mechanism is actuated, the containers are jettisoned overboard. Both automatic and manual actuation means are required. Smaller containers, such as 6 or 18 gallon bladders may be stowed in a locker. Similarly, when actuated for release, the containers are jettisoned overboard from the locker. Gasoline stowage shall be located on the weather deck only, except where approved by NAVSEA in accordance with reference (a). 10.4.5 Portable Containers. Approved portable containers are identified in references (a) and (c), but are provided here: a. Metal or safety cans per reference (k) or reference (l). b. Fifty-five gallon stainless steel drums per reference (h), section 172.101, and reference (i), section 147.45. c. Collapsible rubberized fabric drums (bladders) per reference (m) or specifically approved by NAVSEA. d. Rigid portable fuel contai ners per reference (k). 10.4.6 Firefighting and Safety Requirements. Ensure all personnel involved in the operation or movement of MOGAS are trained and briefed. During an on-load or off-load evolution station the fire parties per references (g) and (n).

COMUSFLTFORCOMINST 4790.3 REV D CH 3 07 Nov 2023 VI-10-5 10.5 MOTOR GASOLINE ASSESSMENT PROGRAM. The MOGAS Assessment Program has been established to assist Ship’s Force personnel in the operation and maintenance of the installed MOGAS systems. This program requires an assessment to be conducted on each MOGAS equipped ship annually, prior to on-load or off-load of MOGAS evolutions, and prior to an industrial or fleet maintenance availability. a. To certify ship's personnel in the opera tion and maintenance of the installed MOGAS system or jettison rack or locker systems. This program calls for an assessment visit to all ships with a MOGAS jettison system by representatives of RMC Code 200, and the applicable ISIC prior to pier-side loading or off-loading of MOGAS. Request for certification or assessment will be coordinated with each ISIC, to ensure optimum scheduling of the certification or assessment. Certification remains in effect for 12 months providing the term be not in conflict with the following mandatory certification inspection requirements. (1) After completion of any signi ficant alteration or modifications. (2) Following overhaul or extended ship yard availability where MOGAS systems were worked on. (3) Upon request from the respective ships through each applicable ISIC. b. The MOGAS Assessment Program must be conducted by the ISIC, and will consist of the following elements: (1) Conducting required assessments, a nd providing assessment reports to the appropriate Type Commander and Fleet Commander. (2) Taking corrective action on minor di screpancies and providing guidance for repairs of major discrepancies. (3) Providing on the job training for ope rators and maintenance personnel, as requested. (4) Reviewing and validating the C oordinated Shipboard Allowance List, Aviation Fuel Operational Sequencing System, Planned Maintenance System, Personnel Qualification Standard and the associated technical manuals. (5) Providing assistance during MOGAS on- load or off-load evolutions, as requested. (6) Performing assist visits when requested by the ship. c. LPD 17 Class MOGAS Assessment and Certification should be conducted per reference (e).

COMUSFLTFORCOMINST 4790.3 REV D 16 Oct 2019 VI-11-1 VOLUME VI CHAPTER 11 MAINTENANCE, REPAIR AND OVERHAUL OF SERVICE CRAFT, LANDING CRAFT AND SMALL BOATS REFERENCES. (a) OPNAVINST 4780.6 - Policy for Administeri ng Service Craft and Boats in the U.S. Navy (b) OPNAVNOTE 4780 - Service Craft and Boats Accounting Report (SABAR) (c) NAVSEA S9086-TX-STM-010 - NSTM Ch apter 583 (Boats and Small Craft) (d) NWP 1-03.1 - Naval Warfare Publications Operational Report (e) NAVSEA S9086-HB-STM-010 - NSTM Chapter 233 (Diesel Engines) 11.1 PURPOSE. To provide guidance and assign responsibilities for the maintenance and repair of service craft, landing craft and small boats. a. Personnel assigned to individual ships, service craft or responsible shore based activities must perform all landing craft, service craft and boat maintenance within their capabilities. b. Landing craft, small boats and service craf t must be maintained with the same care that naval ships receive. This is particularly true for boats which also serve as ready lifeboats. c. (Submarine Force only) If there is no Unit Identification Code (UIC) assigned to the craft, the parent command’s UIC and a unique Work Center will be used for Current Ship’s Maintenance Project control and any related OPNAV 4790/2K (see Chapter 19, Appendix E of this volume). 11.2 MATERIAL READINESS. a. Regular periodic inspections of landing craft, small boats and service craft must be conducted by the command to which the craft is assigned (referred to hereafter as the “parent command”). Use Fleet Maintenance Activity (FMA) facilities to conduct the required periodic inspections, whenever possible. The results of these inspections will determine the need for repairing a craft or boat. Submit overhaul and major maintenance items (i.e., engine overhauls and hull repairs beyond the ability of the parent command) to the appropriate Type Commander (TYCOM), no later than 15 January for the current and following two years. The requests for maintenance must cite the boat or craft hull number and the fiscal year quarter in which the overhaul or major maintenance availability is desired. Any significant changes to previously submitted maintenance requests must be discussed in detail (i.e., material condition of the craft affected by the change, operational commitments requiring changes, etc.). b. To conserve repair funds and assets, and to maintain craft and boats in a satisfactory state of material readiness, Commanding Officers of ships and shore activities must set up a training program for all personnel connected with the operation and maintenance of craft and boats. Pride of ownership should be instilled in boat crews and assigned