When doing the calculations required by § 174.310 of this subpart—
(a) Equalization arrangements requiring mechanical aids, such as valves, may not be assumed to be effective in reducing the angle of heel; and
(b) Spaces joined by ducts may be assumed to be common spaces only if equalization takes place within 15 minutes after flooding begins.
source: CGD 79-023, 48 FR 51048, Nov. 4, 1983, unless otherwise noted.
cite as: 46 CFR 174.325