In a longitudinally-framed ship, the longitudinal frames are held in place and supported by athwartship members called __________.

Correct Answer: Option B — web frames

Longitudinal frames are supported at intervals by massive athwartship members known as web frames. These heavy structural elements provide rigidity, maintain hull cross-sectional shape, and distribute concentrated loads across the vessel's primary transverse ring structure in accordance with Classification Society and 46 CFR structural standards.