46 CFR §154.1405
When Table 4 references this section, a vessel carrying the listed cargo must have:
- (a)Respiratory protection equipment for each person on board that protects the person from the cargo vapor for at least 5 minutes; and
- (b)Two additional sets of respiratory protection equipment that:
- (1)Are stowed in the wheelhouse; and
- (2)Protects the wearer from the cargo vapor for at least 5 minutes.