Colregs Questions and Answers (Q & A)

Rule 9

Narrow channels

The answers can be found in the respective Rules and Paragraphs in the book"International Regulations for Preventing Collisions at Sea (Colregs) by Capt. Pierre Deseck and/or in the Colregs Presentation (on DVD), also by Capt. Pierre Deseck

Q = Question; A= Answer

Q 9-1
Define the term "narrow channel" or "fairway".

A 9-1
Par. 9.1, Narrow channel or fairway.
Click on narrow channel for a summary


Q 9-2
Where should vessels navigate in a narrow channel or fairway

A 9-2
Rule 9 and Par. 9.1, Narrow channel or fairway
Click on where to navigate for a summary

Click on where to navigatefor a animation


Q 9-3
To what type of vessels does Rule 9, Narrow channels, apply.

A 9-3
Par. 9.1, Narrow channel or fairway, seventh paragraph.


Q 9-4
What is the object of Rule 9 (a): keep as near to the outer limit of the channel or fairway which lies on the starboard side ?

A 9-4
Par. 9.1, Narrow channel or fairway, sixth paragraph.


Q 9-5
Is it imperative to keep as near as possible to the outer limit of the chan­nel or fairway which lies on the starboard side ?

A 9-5
Rule 9 (a) and Par. 9.1, Narrow channel or fairway, eleventh paragraph.


Q 9-6
Which precautionary steps can you take if without any apparent reason an oncoming vessel does not keep to the starboard side of the channel or fairway or navigates on the wrong side ?

A 9-6
Par. 9.1, Narrow channel or fairway, eight and ninth paragraph.
Click on precautionary steps for a summary


Q 9-7
When is a vessel allowed to move away from the starboard side of the narrow channel or fairway ?

A 9-7
Par. 9.1, Narrow channel or fairway, twelfth paragraph.
Click on move away from the starboard side for a summary


Q 9-8
Does paragraph (a) of Rule 9, Narrow channels, apply to vessels cross­ing a narrow channel or fairway ?

A 9-8
Par. 9.1, Narrow channel or fairway, thirteenth paragraph.


Q 9-9
How can you check that you are keeping to the starboard side of a nar­row channel or fairway ?

A 9-9
Par. 9.1, Narrow channel or fairway, Note, second paragraph.


Q 9-10
Which vessels are not allowed to impede the passage of a vessel which can safely navigate only within a narrow channel or fairway ?

A 9-10
Rule 9 (b) and Par. 9.2, Vessels of less than 20 metres and all sailing vessels.
Click on impede the passage for a summary


Q 9-11
Is a sailing vessel allowed to sail in an narrow channel or fairway ?

A 9-11
Par. 9.2, Vessels of less than 20 metres and all sailing vessels, sixth paragraph.


Q 9-12
Are fishing vessels allowed to impede the passage of any other vessel navigating within a narrow channel or fairway ?

A 9-12
Rule 9 (c) and Par. 9.3, Fishing craft.
Click on fishing vessels for a summary


Q 9-13
Are fishing vessels allowed to fish in an narrow channel or fairway ?

A 9-13
Par. 9.3, Fishing craft, second paragraph.
Click on fish in a narrow channel for a summary


Q 9-14
Is a vessel allowed to cross a narrow channel or fairway if such crossing impedes the passage of a vessel which can safely navigate only within such channel or fairway ?

A 9-14
Rule 9 (d) and Par. 9.4, Crossing a narrow channel or fairway.
Click on cross a narrow channel for a summary


Q 9-15
If a vessel is navigating into a narrow channel or fairway doubts about the intentions of a vessel wishing to cross that narrow channel or fairway, which precautionary measures can the stand-on vessel take and how should the crossing vessel negotiate that crossing ?

A 9-15
Par. 9.4, Crossing a narrow channel or fairway, third paragraph.
Click on doubting for a summary


Q 9-16
What is the best measure a crossing vessel can take if by crossing a narrow channel or fairway she will impede the passage of a vessel which can safely navigate only within such a narrow channel or fairway ?

A 9-16
Par. 9.4, Crossing a narrow channel or fairway, fourth paragraph

Click on best measure for a animation


Q 9-17
If between a vessel navigating in a narrow channel or fairway and a crossing vessel there is a risk of collision, what action must both vessels take ?

A 9-17
Par. 9.4, Crossing a narrow channel or fairway, fourth paragraph.


Q 9-18
When, must a vessel intending to overtake, in a narrow channel or fair­way, take appropriate measures ?

A 9-18
Rule 9 (e) (i) and Par. 9.5, Overtaking in an narrow channel or fairway, Note, third paragraph.


Q 9-19
How must an overtaking vessel indicate her intention to overtake anoth­er vessel in a narrow channel
or fairway ?

A 9-19
Rule 9 (e) (i) and Par. 9.5, Overtaking in an narrow channel or fairway, Note, third paragraph third paragraph.
Click on signals for overtaking for a summary


Q 9-20
How can a vessel to be overtaken in a narrow channel or fairway indicate that it is doubtful or sate to overtake ?

A 9-20
Rule 9 (e) (i) and Par. 9.5, Overtaking in an narrow channel or fairway, Note, fifth paragraph.
Click on doubtful for a summary


Q 9-21
How can a vessel to be overtaken in an narrow channel or fairway, indicate that she agrees to the manoeuvre ?

A 9-21
Rule 9 (e) (i) and Par. 9.5, Overtaking in an narrow channel or fairway, Note,fourth paragraph.


Q 9-22
Can the overtaking and agreement signals be supplemented by light signals ?

A 9-22
Par. 9.5, Overtaking in an narrow channel or fairway, Note, first para­graph.


Q 9-23
On which side should an overtaking vessel in a narrow channel or fairway pass the vessel to be overtaken ?

A 9-23
Par. 9.5, Overtaking in an narrow channel or fairway, Note, fourth and fifth paragraph.

Click on side to overtake for a animation


Q 9-24
Which appropriate measurers should the vessel about to be overtaken in an narrow channel or fairway take to permit safe passing ?

A 9-24
Rule 9 (e) (i) and Par. 9.5, Overtaking in an narrow channel or fairway, Note, sixth and seventh paragraph.
Click on appropriate measures for a summary


Q 9-25
How can the overtaking procedure be clarified ?

A 9-25
Par. 9.5, Overtaking in an narrow channel or fairway, Note, eight para­graph.
Click on overtaking procedure for a summary


Q 9-26
Where should the look-out be posted in an narrow channel and fairway and why ?

A 9-26 
Par. 9.5, Overtaking in an narrow channel or fairway, Note, ninth paragraph.


Q 9-27
When there is a overtaking vessel and a vessel to be overtaken in a nar­row channel or fairway, which of the two is the privileged vessel ?

A 9-27
Rule 9 (e) (ii) and Par. 9.5, Overtaking in an narrow channel or fairway, Note,tenth paragraph.


Q 9-28
How shall a vessel round a bend of a narrow channel or fairway ?

A 9-28
Rule 9 (f) and Par. 9.6, Bends in a channel or fairway.
Click on round a bend for a summary


Q 9-29
Which appropriate signal shall vessels sound when they are about to take a bend where other vessels may be obscured ?

A 9-29
Rule 9 (f) and Par. 9.6, Bends in a channel or fairway, second and third paragraph.
Click on take a bend for a summary


Q 9-30
If two vessels cannot negotiate a bend at the same time, which one of them must wait and which one must proceed ?

A 9-30
Par. 9.6, Bends in a channel or fairway, fourth paragraph.
Click on vessel to proceed for a summary


Q 9-31
Why should a vessel avoid anchoring in a narrow channel ?

A 9-31
Rule 9 (g) and Par. 9.7, Anchoring in a narrow channel.


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