During a fire drill on a vessel subject to 46 CFR §185.420(b), a newly joined crew member has completed initial firefighting training on a sister vessel of the same class. Which of the following statements correctly describes how this training applies to the regulatory requirements?

1. A. Training on a sister vessel satisfies only the initial training requirement; the crew member must complete monthly and quarterly drills on the assigned vessel before they count.
2. ✓ Training conducted on a sister vessel may be considered equivalent to the initial, monthly, and quarterly training requirements.Correct
3. C. Sister vessel training is acceptable for quarterly refreshers only; initial and monthly egress training must be conducted on the assigned vessel.
4. D. Sister vessel training is not recognized under 46 CFR §185.420 and must be repeated in full on the assigned vessel.