Rule 13: Overtaking | COLREGS In Depth

Summary

In this video, the focus is on Rule 13 of the International Regulations for Preventing Collisions at Sea, which governs overtaking situations between vessels. The rule requires that the overtaking vessel keep out of the way of the vessel being overtaken, and specifies the angles at which overtaking is defined. Visual aids and examples are provided to clarify how vessels should behave in various scenarios. The video emphasizes that once a vessel has overtaken another, it cannot re-enter a crossing situation. The summary also includes the importance of assuming an overtaking role when in doubt.

Takeaways

• 😀 Rule 13 applies when vessels are in sight of each other, and one is overtaking the other.
• 😀 The overtaking vessel must **keep out of the way** of the vessel being overtaken.
• 😀 Rule 13 takes precedence over other rules in Part B of the Collision Regulations (e.g., risk of collision, safe speed).
• 😀 'Notwithstanding' in Rule 13 means no other rules can override the overtaking vessel's responsibility to give way.
• 😀 A vessel is considered overtaking when it comes from more than 22.5 degrees abaft (behind) the beam of another vessel.
• 😀 If unsure whether overtaking, a vessel should assume it is and act as the give-way vessel.
• 😀 The overtaking vessel is not allowed to change course and create a crossing situation once overtaking is completed.
• 😀 Once overtaken, the overtaking vessel cannot cross ahead of the other vessel, even if it alters its course.
• 😀 The rule emphasizes the need for vessels to communicate and adjust course if a risk of collision exists.
• 😀 In restricted visibility, Rule 19 applies, and Rule 13 does not govern overtaking situations.
• 😀 The use of diagrams helps clarify overtaking situations, showing the importance of relative bearings and sector angles.

Q & A

What is Rule 13 in maritime navigation?

Rule 13 pertains to overtaking situations, stating that any vessel overtaking another must keep out of the way of the vessel being overtaken. The overtaking vessel is the give-way vessel, and the vessel being overtaken is the stand-on vessel.

When does Rule 13 apply?

Rule 13 applies when vessels are in sight of each other, meaning they can visually observe each other. If the vessels are in restricted visibility, Rule 19 applies instead of Rule 13.

What does 'notwithstanding anything contained in the rules of Part B sections one and two' mean in Rule 13?

'Notwithstanding' means that nothing in Part B sections one and two, such as rules regarding lookout, safe speed, and risk of collision, can override the responsibilities outlined in Rule 13 for overtaking vessels.

How does Rule 13 relate to other rules in Part B sections 1 and 2?

Rule 13 supersedes other rules in Part B sections 1 and 2, except in situations of restricted visibility. This means the general rules for collision prevention do not override the overtaking vessel's responsibility to keep clear.

What is the significance of the 22.5-degree angle mentioned in Rule 13?

The 22.5-degree angle indicates the sector from which a vessel is considered to be overtaking. If a vessel approaches within this sector (more than 22.5 degrees abaft the beam of the other vessel), it is deemed to be overtaking.

What should a vessel do if it is in doubt about whether it is overtaking another vessel?

If a vessel is in doubt, it should assume it is overtaking the other vessel and act as the give-way vessel. This follows Part C of Rule 13.

What happens if a vessel changes its course after overtaking another vessel?

According to Part D of Rule 13, once a vessel has overtaken another, it cannot alter its course to create a crossing situation. The overtaking vessel must maintain its position and cannot act as a crossing vessel.

What is the role of the stand-on vessel in an overtaking situation?

The stand-on vessel, or the vessel being overtaken, has the right to continue its course, while the overtaking vessel (the give-way vessel) must maneuver to avoid collision and stay clear.

How does the diagram help explain the overtaking situation in Rule 13?

The diagram illustrates the concept of the 22.5-degree sector, showing how a vessel's position relative to another determines whether it is overtaking or not. It helps visualize when the overtaking vessel needs to stay clear.

What is the danger of not following Rule 13 in overtaking situations?

Not following Rule 13 can lead to collisions, as the overtaking vessel may fail to stay clear of the stand-on vessel, or both vessels may misinterpret their responsibilities, leading to unsafe maneuvers.