Question 2084 Deck Safety

The correct answer is B) slack. A tank that is not completely full or empty is referred to as a "slack" tank in the context of US Coast Guard Captain's License Examinations. This term is used to describe the condition of a tank that has a free surface of liquid, which can affect the vessel's stability. The presence of a slack tank introduces additional forces and moments that must be accounted for in the vessel's stability calculations. The other answer choices are not the correct terminology used in this context. "Elemental," "pressed," and "inertial" do not accurately describe the status of a partially filled tank on a vessel.