Which type of alteration of course and/or speed should be avoided?

The concept of maneuvering a vessel safely involves understanding how different types of course and speed alterations can impact the vessel's navigation and stability. A succession of small alterations can lead to confusion and may not effectively communicate the intended maneuvers to those on board or nearby vessels. This could create an unpredictable pattern that may increase the risk of collision or make it difficult for the crew to respond appropriately to evolving circumstances.

In contrast, a single large alteration can be more clearly defined and understood by all crew members, allowing for a more decisive navigation strategy. Maintaining a constant speed is essential for stability, and not making any alterations at all may be appropriate in certain situations where circumstances allow for it. Therefore, avoiding a succession of small alterations is critical for maintaining safe and effective navigation.