Following are the procedures to be followed under various conditions of operation when diesel engine heat exchanger casualties occur:

UNDER NORMAL STEAMING CONDITIONS

1. Notify the engineer officer and the OOD, and request permission to secure the engine.

2. When permission is granted, secure the engine.

3. Secure both the saltwater inlet and outlet valves to the heat exchanger.

4. Remove the visual inspection plate on the exchanger. Plug the expansion tank vent, and apply pressure to the freshwater side of the system by opening the valve from the ships freshwater supply system, and check for leaks.

5. Upon detection of the leak, plug the tubes or install another core.

6. Upon completion of the repairs, notify the engineer officer.

DURING HOSTILITIES, WITH ACTION PROBABLE

1. Notify the engineer officer and the OOD, and request permission to slow the engine and in-crease speed on the other engine to maintain the speed required.

2. Reduce the saltwater cooling pressure to the heat exchanger by using manual control.

3. Keep a constant watch on the supply of freshwater in the expansion tank; keep the tank refilled from the ships service freshwater system, to replace water lost through the leak. Observe all gages constantly for normal operating pressures and temperatures. Keep the engineer officer informed of operating conditions.

4. At the earliest possible time, make the necessary repairs.