level detector circuit and monitors the valve position by open and shut lights on the control console. 4. Circuit for drainage eductor actuating and overboard discharge valves. This circuit actuates the valves either open or shut by switches on the control console. Additional features of this circuit are: a. The circuit stops the actuating valve in any intermediate position to allow throttling of eductors actuating supply. b. Actuating valve is interlocked with the overboard discharge valve to prevent opening until the overboard discharge valve is opened. c. The overboard discharge valve is inter- locked with the actuating valve to prevent closing until the actuating valve is closed. d. Circuit monitors valve position by open and shut lights on the control console. 5. Circuit for stripping, ballast, and drainage valves in the drainage system three-valve interlocked manifold. These circuits actuate the valves either open or shut by switches on the control console. Additional features of the circuits are as follows: a. The three circuits are interlocked together to permit opening only one valve at a time. If any one of the three valves are open the other two are held closed by the circuits. b. Stripping valve circuit bypasses the saltwa- ter detector circuit to allow the JP-5 or ballast storage tank drainage manifold valves to be opened. c. Circuit monitors valve positions via open and shut lights on control console. 6. Circuit for JP-5 and JP-5 service tank electric motor operated stripping manifold valve. This circuit actuates the valve either open or shut by a switch on the control console. Circuit monitors valve positions by open and shut lights on control console. 7. Circuit for JP-5 or ballast and JP-5 overflow or ballast tank drainage electric motor-operated manifold valves. This circuit actuates the valves either open or shut by a toggle switch on the control console. This circuit is interlocked with the seawater detector in the tank to prevent opening the valve if JP-5 is in the storage tank. The seawater detector interlock is bypassed when the stripping valve in the three valve interlocked drain- age manifold is opened. Circuit monitors valve posi- tions by open and shut lights on control console. 8. Circuit for selected JP-5 and drainage cutout valves. This circuit actuates the valves either open or shut by a switch on the console. Circuit monitors valve positions by open and shut lights on console. 9. Circuit for monitoring valve positions for valves that are manually operated and have limit switches at open and shut positions to actuate “open” and “shut” lights. Circuit actuates “open” and “shut” lights when in intermediate positions and shut off “open” light when valve is closed and shut off “shut” light when valve is open. 10. Circuit for starting and stopping JP-5 service pump. This circuit actuates the pumps to start and stop by a switch on the control console. Circuit monitors pump operation via “on” and “off” lights on control console. 11. Circuit for monitoring selected pump and pu- rifier positions. The circuit actuates “on” lights when equipment is running and actuate “off” lights when equipment is not running. 12. Circuit for high level detector override. This circuit overrides the high level circuit of the tank level gage system to allow transferring fluid out of the tank or topping off the tanks to 100 per cent full. 13. Circuit for the electric motor operated JP-5 gate valves in shaft alleys No. 1 and 4. This circuit actuates the valves either open or shut by a switch on the forward console. Circuit monitors valve positions on both the forward and aft console by open and shut lights. JP-5 FUELING SYSTEM OPERATIONS LEARNING OBJECTIVE: Identify various JP- 5 fuel system operations. Explain proper pro- cedures for each operation. Underway replenishment, transfer of fuel from one tank to another, and pumping fuel to the flight and hangar decks are everyday facts of life for the ABF. If proper procedures are followed, they are smooth and safe operations. If proper procedures are not followed, the operations become outright dangerous. AVIATION FUELS OPERATIONAL SEQUENCING SYSTEM (AFOSS) As stated before, though much of the equipment and operating procedures are similar from ship to 4-59