Final answer:
The correct answer is that a vessel directed by navigational rules to keep out of the way should avoid crossing ahead of the other vessel to prevent potential collisions.
Step-by-step explanation:
The question refers to navigational rules for vessels, specifically under the 'Rules of the Road' in maritime navigation. According to these rules, a vessel which is directed to keep out of the way of another vessel should, when possible, avoid crossing ahead of the other vessel. This action helps prevent collision risks in situations where one vessel has the right of way over the other. It is crucial for mariners to understand these rules to ensure safety at sea and avoid accidents.