🔍 Key Concepts

• A longitudinal is a structural member that runs fore-and-aft (bow to stern), not side-to-side. • Compare longitudinals with transverse frames and floors, which run athwartship (side-to-side). • Look at how the members are oriented relative to the ship’s length in illustration D033DG.

💭 Think About

• In the drawing, which labeled members clearly run in the same direction as the ship’s length (into and out of the page)? • Which labeled parts are short, side-to-side supports (transverse) rather than long fore‑and‑aft stiffeners? • Among C, E, M, and L, which one is part of a repeating series of slim stiffeners along the side shell, all aligned fore‑and‑aft?

✅ Before You Answer

• Verify that the member you pick is slender and repeats along the hull, not a single heavy web or frame. • Confirm that its main axis is fore‑and‑aft, not vertical or athwartship. • Make sure you are not confusing the shell plating itself with the stiffeners attached to it.