How can stabilizers affect a ship’s stability in heavy weather?

The correct answer reflects the ability of stabilizers to actively influence a ship’s natural roll frequency, which is a critical factor in maintaining stability, especially in heavy weather conditions. Stabilizers work by counteracting the rolling motion that can be exacerbated by waves and wind. When deployed, they create forces that help to reduce the amplitude of rolling, thereby keeping the vessel more upright and increasing passenger comfort as well as safety.

In heavy weather, maintaining a stable position is essential for effective navigation and the safety of both the crew and the ship. By altering the natural roll frequency, stabilizers can provide significant support in situations where the ship would otherwise be subjected to excessive rolling due to the turbulent sea state. This capability can be particularly beneficial, as it helps to mitigate the risk of capsizing and preserve the integrity of the vessel’s structure and cargo.

The other options suggest misunderstandings about the role and functioning of stabilizers. While stabilizers do add some weight, the primary function is not weight addition but motion control. Their effectiveness is significantly enhanced in rough seas rather than being negligible, and they are not primarily designed for speed improvement. Thus, the correct answer underscores the importance of stabilizers in enhancing a vessel's stability during challenging weather conditions.