USCG Exam PracticeFirefighting procedures aboard small vessels
When a fire occurs in a machinery space aboard a small vessel, which combination of actions is required before activating the fixed extinguishing system?
- ✓ Shut off fuel supply and ventilation system to the space.Correct
- B. Open hatches to allow heat to escape, then activate the system.
- C. Use two jets of water to cool the space, then activate the system.
- D. De-energize all vessel electrical systems and notify the Coast Guard first.
Why A is correct
46 CFR §28.265(d)(9)(iv) and 46 CFR §185.512(a)(3)(iv) both specify that for a machinery space fire, the fuel supply and ventilation system must be shut off before activating the fixed extinguishing system. Opening hatches would reintroduce air and undermine the suppression system's effectiveness.