(a) Except as provided in paragraphs (b) and (c) of this section, a Class 2 door is permitted only if—
- (1) Its sill is above the deepest load line; and
- (2) It is not a door described in § 170.265(d).
(b) If passenger spaces are located below the bulkhead deck, Class 2 doors with sills below the deepest load line may be used if—
- (1) The number of watertight doors located below the deepest load line that are used intermittently during operation of the vessel does not exceed two, and;
- (2) The doors provide access to or are within spaces containing machinery.
- (c) If no passenger spaces are located below the bulkhead deck, Class 2 doors may be used if the number of watertight doors located below the deepest load line that are used intermittently during operation of the vessel does not exceed five.
- (d) In determining whether Class 2 doors are allowed under paragraph (c) of this section, the watertight doors at the entrance to shaft tunnels need not be counted. If Class 2 doors are allowed under paragraph (c) of this section, the doors at the entrance to shaft tunnels may also be Class 2.