Just found this, instructions on how to use the old fashioned one dump and blow it outboard yourself from the USN. I thought ours were difficult on T's and before. This would be part of your part 3 of course.
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"Shut the bowl flapper valve, flood the bowl with sea water through the sea and stop valves, and then shut both valves. After using the toilet, operate the flapper valve to empty the contents of the bowl into the expulsion chamber, then shut the flapper valve. Charge the volume tank until the pressure is 10 pounds higher than the sea pressure. Open the gate and plug valves on the discharge line and operate the rocker valve to discharge the contents of the expulsion chamber overboard.
Shut the discharge line valves and leave the bowl flapper valve seated. For pump expulsion, proceed as previously stated except that the contents of the waste receiver are to be pumped out after the gate and plug valves on the discharge line have been opened. If, upon first inspection, the expulsion chamber is found flooded, discharge the contents overboard before using the toilet. Improper operation of toilet valves should be corrected and leaky valves overhauled at the first opportunity"
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Nutty
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"Shut the bowl flapper valve, flood the bowl with sea water through the sea and stop valves, and then shut both valves. After using the toilet, operate the flapper valve to empty the contents of the bowl into the expulsion chamber, then shut the flapper valve. Charge the volume tank until the pressure is 10 pounds higher than the sea pressure. Open the gate and plug valves on the discharge line and operate the rocker valve to discharge the contents of the expulsion chamber overboard.
Shut the discharge line valves and leave the bowl flapper valve seated. For pump expulsion, proceed as previously stated except that the contents of the waste receiver are to be pumped out after the gate and plug valves on the discharge line have been opened. If, upon first inspection, the expulsion chamber is found flooded, discharge the contents overboard before using the toilet. Improper operation of toilet valves should be corrected and leaky valves overhauled at the first opportunity"
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Nutty