Marine Report 236, Independent investigation into the engine room ...

detectors are fitted at various locations in the protected spaces. Break-glass push
buttons to manually initiate the fire alarm are also provided on each deck.
Figure 4: Profile of accommodation and machinery spaces
The fire detectors are divided into eight independent loops or ‘zones’. If a detector
activates, a red light identifying the activated zone illuminates on a fire control
panel located on the bridge (Figure 5). An audible alarm on the control panel also
sounds and, after a short delay, the ship’s fire alarm bells start ringing. Manual
controls on the panel allow individual zones to be reset and bells to be turned off.
Figure 5: Fire alarm control panel
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