According To Navigation Rules Which Of The Following Is True

According to navigation rules which of the following is true – understanding the core principles that keep vessels safe on the water

Maritime navigation is governed by a set of internationally recognized regulations known as the International Regulations for Preventing Collisions at Sea (COLREGs). These rules dictate how vessels should behave when they encounter one another, ensuring predictable actions and minimizing the risk of collision. When a test or study guide poses the question “according to navigation rules which of the following is true”, it is usually presenting several statements about right‑of‑way, give‑way responsibilities, or specific maneuvering obligations. To answer such a question correctly, you need to know not just the literal wording of each rule but also the underlying intent that shapes every situation at sea.

Below is a comprehensive guide that breaks down the COLREGs, examines common answer choices that appear in navigation‑rule quizzes, explains why one statement stands out as true, and provides practical examples to reinforce the concepts. By the end of this article you will be able to approach any “according to navigation rules which of the following is true” question with confidence.

1. The Foundation: What Are the Navigation Rules?

The COLREGs, first adopted in 1972 and periodically updated, apply to all vessels on the high seas and in all navigable waters connected thereto. They are divided into several parts:

For the purpose of most multiple‑choice questions, Part B (Steering and Sailing) is the most relevant because it directly addresses who must give way in crossing, overtaking, and head‑on situations.

2. Core Concepts That Frequently Appear in Quiz Questions

When you see a question phrased as “according to navigation rules which of the following is true”, the answer choices usually revolve around three fundamental concepts:

1. Give‑way vessel vs. stand‑on vessel – The give‑way vessel must take early and substantial action to keep clear; the stand‑on vessel should maintain its course and speed unless it becomes apparent that the give‑way vessel is not taking appropriate action.
2. Overtaking rule – Any vessel overtaking another must keep out of the way of the vessel being overtaken, regardless of vessel type.
3. Crossing situation – When two power‑driven vessels are crossing so as to involve risk of collision, the vessel that has the other on its starboard side must give way.

Understanding these three pillars allows you to evaluate each statement in a typical quiz.

3. Dissecting Common Answer Choices

Below are four representative statements that often appear in navigation‑rule examinations. We will analyze each one against the COLREGs, point out any nuances, and identify which statement is unequivocally true.

3.1. Choice A – “A sailing vessel under sail alone must always give way to a power‑driven vessel.”

Analysis: - Rule 18(b) states that a sailing vessel shall keep out of the way of: 1. a vessel not under command,
2. a vessel restricted in her ability to maneuver,
3. a vessel engaged in fishing,
4. a vessel under way (i.e., making way through the water) and not a sailing vessel.

• However, if the power‑driven vessel is under way and the sailing vessel is also under way, the sailing vessel does not automatically have to give way. The rule only applies when the power‑driven vessel is not under command, restricted, or engaged in fishing.
• Moreover, when both vessels are under sail, the usual port‑starboard rule (Rule 12) applies. Conclusion: This statement is too absolute and therefore false.

3.2. Choice B – “In a head‑on situation, both power‑driven vessels shall alter course to starboard so that each passes on the port side of the other.”

Analysis:

• Rule 14(a) explicitly covers head‑on situations: “When two power‑driven vessels are meeting on reciprocal or nearly reciprocal courses so as to involve risk of collision, each shall alter her course to starboard so that each shall pass on the port side of the other.”
• The rule requires early and substantial action; a small course change is insufficient.

Conclusion: This statement is true and matches the COLREGs verbatim.

3.3. Choice C – “The vessel that has the other on her port side must give way in a crossing situation.”

Analysis:

• Rule 15 addresses crossing situations: “When two power‑driven vessels are crossing so as to involve risk of collision, the vessel which has the other on her starboard side shall keep out of the way and shall, if the circumstances of the case admit, avoid crossing ahead of the other vessel.”
• Therefore, the vessel with the starboard‑side target gives way, not the port‑side vessel.

Conclusion: This statement is false because it reverses the correct side.

3.4. Choice D – “A vessel engaged in fishing shall keep out of the way of all other vessels.”

Analysis:

• Rule 18(d) says a vessel engaged in fishing shall keep out of the way of: 1. a vessel not under command,
  2. a vessel restricted in her ability to maneuver,
  3. a vessel under way (i.e., making way) and not engaged in fishing.
• It does not require the fishing vessel to give way to all other vessels; for example, it must give way to a vessel not under command, but a power‑driven

...vessel under way that is not fishing. However, a fishing vessel does not have to give way to a sailing vessel under sail or to another fishing vessel. The rule creates specific give-way obligations, not a blanket one.

Conclusion: This statement is false because it overgeneralizes the fishing vessel’s responsibilities.

Overall Conclusion

The preceding analysis demonstrates that accurate interpretation of the COLREGs hinges on recognizing precise conditions and exceptions. Absolute or simplified statements—such as “sailing vessels always give way,” “fishing vessels yield to all,” or reversing the starboard-side rule in crossings—are common traps that lead to incorrect conclusions. The rules are context-dependent, balancing responsibilities based on vessel type, status, and maneuvering capability. Mastery requires consulting the specific rule applicable to the encounter rather than relying on generalized assumptions. In practice, this precision is essential for safe and lawful navigation.

vessel under sail, nor to a vessel constrained by her draft, nor to a vessel engaged in fishing.

Conclusion: This statement is false because it overgeneralizes the fishing vessel’s responsibilities.

Overall Conclusion

The preceding analysis demonstrates that accurate interpretation of the COLREGs hinges on recognizing precise conditions and exceptions. Absolute or simplified statements—such as “sailing vessels always give way,” “fishing vessels yield to all,” or reversing the starboard-side rule in crossings—are common traps that lead to incorrect conclusions. The rules are context-dependent, balancing responsibilities based on vessel type, status, and maneuvering capability. Mastery requires consulting the specific rule applicable to the encounter rather than relying on generalized assumptions. In practice, this precision is essential for safe and lawful navigation.