| Drawings of your ship indicate the use of "B" class bulkheads. The "B" indicates which of the following? |
| A) "B" class bulkheads must not allow flame or smoke passage for 15 minutes when subjected to a fire test. |
| B) "B" class bulkheads must not allow flame passage for 30 minutes when subjected to a fire test. |
| C) "B" class bulkheads must not allow flame passage for 60 minutes when subjected to a fire test. |
| D) "B" class bulkheads must not allow flame passage for 120 minutes when subjected to a fire test. |
