Final answer:
According to the Navigation Rules, a vessel may deviate from these rules when d. it is necessary to avoid a collision, ensuring the safety of the crew and vessel.
Step-by-step explanation:
The question posed pertains to the situations in which one may deviate from the standard Navigation Rules.
Navigation Rules, also known as the 'Rules of the Road,' are a set of guidelines put in place to prevent collisions at sea. They are applicable to all vessels upon the high seas and in all waters connected therewith navigable by seagoing vessels.
According to these rules, a vessel operator must adhere to the Navigation Rules unless an immediate danger requires a departure from the rules to prevent a collision or to ensure the safety of the crew and the vessel. The specific answer to this question is that you may depart from the Navigation Rules when it is necessary to avoid a collision.