Coast Guard Practice Exam 2025 – Complete Prep Guide

A square or rectangular opening in a deck is referred to as a hatch. Hatches are designed to provide access to areas below the deck, allowing for the movement of equipment, supplies, or personnel. They are essential for the operation of a vessel, as they facilitate access to critical spaces such as holds, engine rooms, or living quarters.

The design of hatches typically includes a cover that can be secured to maintain the integrity of the waterproofing of the vessel. This capability is crucial, as it ensures that water does not enter the compartments below deck, thereby preventing flooding and maintaining the vessel's stability.

Other terms associated with a vessel or its components include "hawser," which refers to a thick rope used for mooring or towing, "gunwale," which is the upper edge of the sides of a boat or ship, and "mast," which is a tall, upright post used to support sails. However, none of these terms describes an opening in the deck, making "hatch" the correct terminology in this context.