Where foam extinguishing systems are provided on a MODU, each machinery flat in the protected space must have a(n) __________.

Correct Answer: Option C — coaming

In accordance with 46 CFR 108.473, each machinery flat located within a space protected by a fixed foam system must be fitted with a coaming. The coaming retains fuel spills locally and prevents liquid foam solution from draining away immediately, thereby maintaining the blanket required to extinguish flammable liquid fires.