| 1. | The guns were controlled by a centrally located command post / plotting room.
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| 2. | Plotting rooms were constructed in 1941-2, and searchlights installed at Billy Goat point.
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| 3. | The switchboard room connected the plotting room to the external fire control towers.
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| 4. | Sometimes plotting rooms were located hundreds of yards from the batteries they controlled.
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| 5. | This provided enough additional space behind the armored belt to add a second plotting room.
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| 6. | Training facilities for the various plotting rooms around Sydney were also located in the area.
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| 7. | A plotting room bunker was also behind the guns.
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| 8. | All magazines and the command post / plotting room have had their steel doors removed.
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| 9. | The forward main battery plotting room was located below the waterline and inside the armored belt.
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| 10. | Private McDonald found Lt Kermit Tyler when he entered the plotting room when he timed the message.
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