Question 57 ONC01 - Master/Chief Mate Unlimited Tonnage

The Correct Answer is D **Explanation for Option D ("transversely framed"):** A vessel that utilizes **transverse framing** (or conventional framing) relies on a dense network of strength members oriented athwartships (transversely). These members include closely spaced **floors** (in the bottom structure) and **frames** (up the sides) that run perpendicular to the keel. The function of this system is to provide strength and rigidity against external pressures and internal loads. Therefore, a vessel characterized by "continuous closely spaced transverse strength members" is defining a **transversely framed** vessel. **Why the other options are incorrect:** * **A) cellular framed:** While some vessels have a cellular structure (like double bottoms), "cellular framing" is not a standard, primary classification describing the arrangement of *closely spaced transverse* members. Cellular structures often imply the use of both longitudinal and transverse members to form watertight compartments, which is characteristic of the overall hull construction, not just the dense transverse spacing. * **B) web framed:** **Web framing** is a system used in conjunction with conventional framing, where certain frames are made much deeper and stronger (called web frames) and are spaced widely apart, with lighter, intermediate frames in between. This system is characterized by widely spaced, very deep members, which contradicts the definition of having *continuous closely spaced* members. * **C) longitudinally framed:** A **longitudinally framed** vessel primarily relies on strength members (like longitudinals, girders, and stringers) that run parallel to the keel (fore and aft). In this system, the transverse members (transverse bulkheads and deep web frames/transverses) are typically *widely spaced*, as the longitudinals bear the primary stresses. This directly contradicts the description of having "closely spaced transverse strength members."