What situation is described when a tug has more leverage than the rudder(s)?

• A. Full ahead
• B. Slow headway
• C. Slow sternway
• D. At anchor

Answer: (C)

When a tug has more leverage than the rudder(s), it typically indicates that the vessel is moving backwards, which aligns with the situation described as slow sternway. In this scenario, the tug can exert a significant influence on the direction and movement of the vessel due to the dynamics involved when the vessel is moving in reverse. The rudder's effectiveness diminishes when the vessel is moving against the natural flow of water, allowing the tugboat, which is designed for maneuverability and thrust, to control the ship more effectively.

In contrast, other options such as full ahead or slow headway do not provide the same conditions where the tug can exert its influence over the rudder. Full ahead refers to the vessel moving forward at speed, where the rudder is more effective. Slow headway, while it implies a forward movement, does not convey the same leverage dynamics that occur in slow sternway due to the reduced water flow over the rudder. At anchor means the vessel is stationary and not influenced by either the tug or the rudder in propelling the vessel. Thus, the situation where the tug has more leverage relative to the rudder is best represented by slow sternway.