Under 46 CFR §185.420, a vessel operator conducts firefighting proficiency training on a sister vessel for a crew member who has just joined the crew. Which of the following statements correctly describes the regulatory effect of that training?

1. A. Training on a sister vessel satisfies only the quarterly requirement; a separate initial training must still be conducted on the assigned vessel before getting underway
2. ✓ Training on a sister vessel may be considered equivalent to the initial, monthly, and quarterly training requirementsCorrect
3. C. Training on a sister vessel satisfies the monthly egress requirement only; it does not satisfy the initial or quarterly general emergency training requirement
4. D. Training on a sister vessel is not recognized as equivalent under any circumstance; all training must occur on the vessel to which the crew member is assigned