What statement is true concerning the ability of a line shaft bearing to adapt to shaft misalignment as the ship's hull flexes?

Correct Answer: Option A — Some line shaft bearings may have only a bottom half bearing shell, which allows for deflection upwards only. Other line shaft bearings may be spherically-seated self-aligning bearings or conventional non-aligning type bearings.

Line shaft bearings must accommodate hull deflection and shaft misalignment. Designs include bottom-half shells for simple upward deflection, while spherically-seated bearings provide self-aligning capabilities. These features prevent excessive bearing wear and shaft stress caused by the natural flexing of the vessel's hull under load.