What should a vessel do if it is receiving no response from the give-way vessel?

Maintaining course and speed is the appropriate action for a vessel that is not receiving a response from the give-way vessel. According to the navigation rules, when a vessel has the right of way and it observes that the give-way vessel is not taking action to avoid a potential collision, the right-of-way vessel should continue on its projected path as long as it is safe to do so. This conveys clarity in the situation, allowing both vessels to maintain their designs and movements.

If the right-of-way vessel were to suddenly alter its course or speed drastically, it could create confusion or instability, which might lead to a collision. Therefore, by maintaining course and speed, the vessel ensures that it is predictable in its actions, allowing the give-way vessel an opportunity to react appropriately, should it become aware of the situation.

The other courses of action, such as contacting maritime authorities, accelerating, or changing course sharply, might introduce unforeseen risks or exceed the intended aim of avoiding a collision.