Question 2267 Deck General

70% to pass

A disk with a horizontal line through its center, equivalent to the summer load line, is called the _______________.

A deadrise mark
B maximum allowable draft mark
C tonnage mark
D Plimsoll mark
AI Explanation

The correct answer is D) Plimsoll mark. The Plimsoll mark, also known as the Plimsoll line or Plimsoll symbol, is a disk with a horizontal line through its center, which represents the maximum safe draft or load line for a vessel. This mark is required by international regulations to be displayed on the hull of a ship, indicating the maximum allowable draft for the vessel based on the vessel's load and stability. The other answer choices are incorrect because they do not accurately describe the Plimsoll mark. The deadrise mark refers to the angle of the hull, the maximum allowable draft mark is a separate indicator, and the tonnage mark is used to determine a vessel's gross tonnage, which is different from the Plimsoll mark.

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