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Foreword lntroduction Rule 5 Look Out!
Rule 6 Watch your Speed! Rule 7 Watch that Ship!
Rule 8 Do Something and do it EarlY!
Rute t0 Traffic Separation Lanes are not Rights of Way! Rule 13 Leave Ample Room!
Rule l4 Ship Ahead!
Rule /5 Watch Vessels to Starboard! Rule 16 Keep Everybody Happyl Rule 17 ls She Altering?
Rute l9 Restricted Visibility Changes Everything!
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FOREWORD
by Captain R B Middleton FNI President The Nautical Institute.
The confidential marine accident reports which we publish each month in our journal SEAWAYS
have indicated that mariners are frequently confronted with hazardous situations relating to the
COLREGS.
To investigate the problems The Nautical Institute initiated in 2002 an international survey
amongst seagoing officers to enquire if they thought there was a problem, what the causes
could be and to suggest solutions.
The results were alarming with nearly 50olo of the respondents stating that in their view the
problems were caused by ignorance and wilful disregard of the rules.
However respondents also drew attention to other factors like distractions due to GMDSS false
alarms, VHF chafter, VTS reporting, and paperwork.
When it came to solutions respondents highlighted both the need to improve the education and
training of watchkeeping officers and better supervision by senior officers on board.
Undoubtedly we all have to work to improve standards of bridge watchkeeping and this thoughtful guide produced by the North of England P&l Club is an excellenr place to start.
Oflicers can work through a page at a time discussing the elements with colleagues and relating
the contents to the full form of the rules.
For experienced officers there is an opportunity to work through the text r, " ,"fru.h". "nd to
use the booklet as a training aid when coaching junior officers and cadets on watch.
It is our duty as nautical professionals to ensure that we are responsible at all times for the safe
navigation of our ships and this booklet provides a valuable text to re-establish good practice.
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CONVENTION
ON THE INTERNATIONAL
REGUIATIONS
FOR
PREVENTING
COLLTSTONS
AT SEA, t972 (COLREGS)
This guide is based on the COLREGS poster series produced by the North of England P&l
Association's Risk Management Department between 2001 and 2004.
The aim of these posters is not to provide an all encompassing guide to the Rules but to dispel
some frequent misunderstandings and misinterpretations of the most widely used Rules and
to provide a graphic illustration of the correct steps to decipher and to apply the Regulations.
While it is vital to know the contents of the Regulations, simply being able to recite them
verbatim is no substitute for knowing how to apply them. A coherent full working knowledge
of the text and its application is
vital-The UK Marine Accident Investigation Branch has stressed the importance of Rule 2 and their
concern that this vital Rule is so often overlooked.
Rule 2 - Responsibiliry
(o) Nothing in these Rules sho/l exonerdte ony vessel, or the owner, moster or crew thereof, from the
consequences of ony neglect to comply with these Ru/es or of neglect of ony precoution which
moy be required by the ordinory proctice of seoman, or by the speciol circumstonces of the case.
(b) ln construing ond complying with these Rules due regord sholl be had to oll dongers of novigation
ond collision ond to ony special circumstances, including the limitations ofthe vessels involved,
which moy moke o deporture from these Ru/es necessory to ovoid immediate donger.
This fundamental feature of the COLREGS highlights the fact that you, the manners, are
responsible for your own actions and you have to comply with the Rules while ensuring that
you take all precautions of the ordinary practice of seafarers - there is no substitute for the
application of common sense on the seas.
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During the Nautical Institute's "lmproving the application of the COLREGS" survey, it was
noted by the late Captain FranEois Baillod FNl, that reported incidents related to "uncertainty",
"violations" and "disregard for the COLREGS". While many cited "ignorance", "poor knowledge
of the COLREGS", or "lack of training" as reasons for the poor and ineffective application of
the Regulations.
The Collision Regulations were devised to make the navigation of ships safer - however we
must remember they are also the law and all should observe them. There can be no excuses
-ignorance is no defence and if you disobey these laws there will be consequences. This guide is
intended to provide a reminder of the Rules and the processes that should be applied in making
them work.
Huch of the guidance text has been provided by Captain Roger Syms who has enthusiastically embraced the idea of providing an easy to use guide to the COLREGS in conjunction with the
original Nonh of England poster series. This project has also been able to make use of the
experiences expressed through the Nautical Institute's survey into the COLREGS.
The North of England also acknowledges with thanks, the contribution and suggestions of
Every vesse sha at al t mes ma nta n a prope. ook-out by siSht and hea fg as wel as by all avalable means approprlate n the
preval ng cumstances and condir ons so as to ma<e a fu a p p r a s a o l t h e s r d a t i o . a n d o f r h e s k o f c o s l o n .
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"Look out" means pay attention to evefihing! - Not lust looking ahead out of the window
but all round the vessel, using all your senses and all appropriate equipment available to you.
KEEP
AN EYE
AND EAR
ON EVERYTHING
THAT GIVES
YOU
INFORMATION
INCLUDING:
o Radar/ARPA - Be aware of the effects of clutter, of small targets and the range of the set.
r Radio transmissions - Keep an ear on what is going on in the vessel's viciniry.
o Sound Signals - Can you hear any sound signals near-by? Be aware of the effect of
keeping a closed wheelhouse, and of distracting noises in a closed space.
o Course and Position Navigation Aids - lf you have to alter course make sure there is
safe water available.
o Depth indicator - frequently and systematically monitor the depth of water beneath
the vessel.
. Be aware - WS and AIS are there to help you.
BEWARE
OF DISTRACTIONS!
o Alarms - Do not allow alarms, such as false GMDSS transmissions, to distract you from
keeping a proper look-out.
o Lights - Do not allow lights on your vessel to impair your vision
o Communications - VHF transmissions and mobile phones are not your first priority.
Do not allow them to distract you.
Rule 5 applies at all times - there must always be someone looking-out. lf weather or conditions cause concern then more lookouts may be needed and should be called without hesitation.
Every vesel shall at all times proceed at a sale speed s ihd she d hke prcper ad eff€ctire &tion io avoid @llision and be iopped within a distece appropriate to the pBailing circumsnces and conditions.
In determining a sale speed the following fado6 shall be amonA lhse taken inb &count: (D the ide of v:rbirity;
(iD the tarfi. demity includins con@nrarions ol lishina vsek or any other v$sels:
(iii) the m-oeuvEbility of rhe v6sel with sp€cial rete.ence to noppin8 disnce and turnjiS ability in $e peEjling (rv) at nieht the peence ot back.ound lishr such a rrcm shore liglts or from back scate. oI her om lights; (vl the sb@ or wind, sd and 4reni dd the proximity of
navigaliomlhards;
(O the daoght id reldion to the &ailable depd, olw:r€i
(b) Additidall, by v€$eb wnh opdional ndd: (D rh€ chd!@rini6, erkiencr and linibhoN ortha
adar equipment;
(it a/ @mftints impGed by rhe Edr ranse scale (ii) the ered on Bdd dd*rion ol the *a s@,
weather -d other sourc6 ofint€rterdce; (iv) rhe pNibility that small v6sek, i@ and other
noatine objed may nor be det€ded by 6dar at an ade+:e aee:
(v) the numbea loation dd mwement orv6sers ded€d by radar;
(vi) dE morc eEd 6s6mert ot the vhibiliry .h:r may be pN ble wfien Bdar k used b deermtne the @se ol vesk or dher objs in rhe vicini+
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Rule 6 allows you to make your own judgement as to the most appropriate sPeed at any time
for your vessel, taking into account the prevailing circumstances and conditions.
CAN YOU REACT
EFFECTIVELY
Without exception the safest speed is a reduced speed, because:
. lt allows you to stop or turn effectively
r lt gives you more time to think and to act in a developing situation '
The time to react and respond effectively is all important - vessels moving too
quickly can often fatally impair their own watchkeeper's risk assessment processes.
r lf collision does occur the resulting damage is likely to be a lot less
Remember the radar or ARPA is not infallible, lt may miss some targets altogether or it may show very large targets as weak echoes.
Navigational aids such as GPS can be equally susPect - don't rely on one instrument for
information, double check it against others.
Constantly monitor your speed - The situation at sea is constantly changing and what can be
deemed a safe speed in one situation can change with circumstances, sometimes suddenly!
l.laintaining high speeds for commercial considerations should not be tolerated
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Listen as well as look! - fu with keeping a look out, you must use all the information and
equipment available to you to determine risk of collision.
Use the compass to check the bearings of approaching vessels - compare it with the radar bearing.
lf you have operational radar you must use it.
Are you using true or relative vectors? lf you have an Automatic Radar Plotting Aid (ARPA) you should use the RELATIVE VECTORS for determining risk of collision and TRUE VECTORS to ascertain the other vessel's actual movement.
You must be aware of the limitations and use of the ARPA and interpret information displayed
correctly.
tf you are not litted with an ARPA you must run a RADAR PLOT.
ls tfte targ€t passing ahead or astern? Or is it going to collide? - Remember the primary information you need to answer these questions is relative information.
Eton't trust ARPA to give you an accurate Closest Point of Approach (CPA). - Where
possible take at least half a mile off each indication to be safe. (lf it shows a CPA of half a mile
assume it is collision).
Don't rely on change of bearing as an indicator of clearance. - As a target approaches
it's change of bearing should speed up significantly. lf the change in bearing does not accelerate,
treat it as a danger.
Don't rrelax your vigilance - Keep monitoring the situation until the target is passed and well clear.
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Remember a positive alteration made very early on is better than a large panic
alteration at the last minute! - the closer you are to the other vessel the more you will
have to do to avoid collision.
Don't iudge a "positive" and "ample" action just by the amount of alteration - confirm
it by the change in CPA. Keep checking the situation until the risk of collision is past and clear.
Make your actions obvious to other vessels - Small alterations of course are dangerous;
they don't usually solve the problem and don't give the other vessel a clear indication of what
you are doing.
Use the engines - lf your ability to alter is constrained then SLOW DOWN or STOP
The other rressel may also be obliged to take action. Always bear in mind what that action may oe.
N O T I M P E D I N G ?
r lf the Rules require you "not to impede", it means you must make a very early alteration
to make sure risk of collision does not develop.
o lf you are the "not to be impeded" vessel be prepared for the other vessel not to take
the correct action. lf a collision is imminent you have to act however constrained you are!
Think about what you are doing - Actions taken to avoid collision should follow the
observance of good seamanship - this is where we have to apply professional and sound Practical
judgement!
Use the Trial Manoeuyre setting on your ARPA, if available.
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There is no right of way - Just because you are navigating within a Traffic Separation Scheme (l-SS) does not give you right of way over other vessels.
The other COLREGS continue to apply within a TSS.
Remain within the lanes - but if your alteration for a crossing vessel is likely to take you
outside the scheme this does not exempt you from following the Rules. lf you are not happy
about it SLOW DOWN or STOP
BE WARY!
Actions of vessels navigating in the vicinity of a TSS can be UNPREDICIABLE.
Look out for crossing vessels on the edge of the scheme. They may alter to cross at right
angles or they may alter parallel to the scheme to find a less crowded place to cross.
Look out for High Speed Craft (HSC) - HSC tend to present collision risks wide on the
beam. HSC do often alter course early, however you cannot assume they will always do so.
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NoMithshnd n3 anlrhing conbned n rhe Rules of Pad B, Sec!oE land l. anyve$eloveGkjnE an/ other shall keep out of the wa/ of ihe vss€l b€ ng ovefrai<en A ve$e shal be deem€d to be ov€tak nE when comins up wiih a mother veset frcm a d rection more thd 22.5 dqrees abaft h€rbeam, that k, in such a pos tion wrh refer€nce to ihe v$3e sh€ c avedaling, ihat at nehtshe wo! d be ab € to see only the s€mlighr of thar resd bur
Whei a v€se i: in any noubt s to wherher she is ovetuking norhei she shal 6sume that this is the.ae Any subsequent al@€t on ol rhe bearing betueen the tuo ves* s sha I noi m3j<e the ove@k nE v€$e a fio$idg vesel wiihin th€ m€an ng of ih$e Rules or rel eve her of the d!ry ol keeprng .leaf ol the ov€tuken Ye$elunti she is linaly pd and der
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Don't forget! lf you are not sure you are an overtaking Yessel, you must assume that you are and keep clear.
Don't pass close - overtaking invariably takes time, so make sure you have a safe distance
between you and the other vessel. (Where possible this should be ot least greater thon your hord-over turning circle.)
Beware of interaction! - if you are forced by traffic to pass closer be very careful that interaction does not occur.
- Avoid crossing ahead - lfyou are not on parallel courses and passing clear, cross astern
rather than ahead.
Does the ship being overtaken know you are there? Always assume they do not! ,
Remain vigilant - Remember, you remain an overtaking vessel until you are finally passed ind clear.
Vvnen wo poweFdriv€n vses m neeting on reciprocal or n€rly recipro€ .o
r sk of .oll sion ach shall a ter her cou6e to s6rhoard so rhat ea.h sha! pson thepofrsideottheothei Such a s tuation shalbe deem€d to exis when a ve$el s€es ihe oiher ahead or nearly ahead and by n ght she
cou d *e the mdh€n lights of the orher io lin€ or nearly in ine aid/or bdh sidellehc 2nd by day sh€ obsery6 ine @respondins $ped ofthe othervsel. (.) When avs€ is in any doubt b to whdhersuch:
snoarion ex sh she sha I sume that it do6 din and (b)
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"Nearfy recipr.ocal" does not mean exactly right ahead. lf a vessel is ahead and coming the other way on an opposite course and roughly within half a point (6 or 7 degrees) of either side of the bow, Rule l4 applies.
IF YOU ARE STILL NOT SURE ASSUME A HEAD-ON STTUATION ANYWAY AND ACT ACCORDINGLY!
UNDERSTAND
RULE
8
o Rule 8(a) says, "any action to avoid collision shall be taken in accordance with the Rules
of this Part ..." ("this Part" being the Steering ond Soiling Rules)
. lt means that if you have a vessel fine to starboard, even at some distance away, altering
to port to increase the clearance may be construed as not being in accordance with the
COLREGS. You should always go to starboard as directed by the Rule.
Alter arty! - Do not wait for the other vessel to act, the closer you get before taking action
the greater the steps you subsequently have to take to avoid collision.
When two power-driven
vessels
are crossing
so as to involve
risk ofcollision,
the vesselwhich
has
the other on her own starboard
side shall
keep out ofthe way and shall,
ifthe circumstances
of
the case
admit, avoid crosslng
ahead
ofthe othervessel.
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Give way early - lf you are the give-way vessel, take early action so the other vessel knows your intentions.
Avoid crossing ahead - Go to starboard, astern of the vessel if at all possible.
Be considerate - lf the other vessel is hampered in any way, action must be taken even earlier
to reassure the other vessel.
Be positive! - lf in doubt over crossing or being overtaken, assume you are crossing and
keep clear.
Use your engines - Remember that you should always have the option of using your engines as well as your helm.
Every vesseiwhich is direcred to keep out ofthe way ofanother vesseLshall, so far 6 Possible, take eady and substa.tial actlon to keeD wellciean
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DO NOT HESITATE! - Alter early and adequately enough to show the other vessel clearly what you are doing.
Confirm your alteration - make sure that your action has had the desired effect by checking
the increase in the CPA on the radar.
KEEP
EVERYBODY
i.4APPY!
o Following Rule l6 makes life easier for all vessels.
o lf the watchkeeper on the other vessel is happy with the situation and with your alteration
there is less likelihood of he/she doing anything unexpected.
o Treat other vessels as you would like to be treated yourself. Apply some courtesy
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(i) Whe.e one of two vessels is to keep out ofthe way the other shallkeep her course (ii) The latter vessel max howeyer, take adionto avoid collision by her manoeuvre alone, 6 soon d it becomes apparent to her thai the vesselrequired lo keep out of the way 1s not taking appropriate action in compliaice with these Rlles.
When, from any cause, the vessel required to keep her course and speed finds herself so close that collision cannot be avoided by
rhe aciion of the give-way vesse alone, she shalltake such a.tion as will best aid to avoid
A power-driven vessel which takes action in a crossing situation in accordance with subparasraph (a)(ii) of this Rule to avoid collision with aiother poweFdriven vesel sha1l, if the circumstances ofthe cde admit, not alter€o!6e to port for a v$sel on her
Thjs Rule does not relieve the giw-way vessel of her obligation to keep out of the way.
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THERT ARE TWO STAGES
TO RULE
| 7(a)(ii) At some distance ofi - when "as soon as it becomes apparent ... that the vessel
required to keep out of the way is not taking appropriate action...", you may take your own action to avoid collision.
PROVIDED you do not alter to port for a vessel on your port side in a crossing situation.
l7(b) At close quarters - when "collision cannot be avoided by the give-way vessel
alone", you should take the best action you can to avoid collision.
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This rule applies ro vesseh not in sEht ofone anotherwhen navigatinS in or near an area of Every ve$el shall proceed at a safe speed adapted to the prevailing circumstances and conditions of restricted visibility.A power driven vessel shall have her ensines ready for immediate manoeuvre,
Every vessel shall have due reSard to the prevailint circumstances and conditions of restricted vislbilit/ when complyii8whh the Rules of Se.tion lof this Part.
Aveselwhich detects by radar alone ihe presence of anorher vessel shall determjne ifa close'qua.ters situation js developing and/or rhk ot collision exists. lfso, she shalltake avoiding action in ample time, provided that when such
action consists ofar altemtion ofcouree, so far 6 posible the foliowiry shall be avoided:
(i) An alt€rato. ofcou6eio porifora vesel foNdd of rhe beam, other the for a ve$el beinS overtaken;
(ii) An alteEtion of course towards a ve$el abeam o. abaft the beam.
(e) Exceptwhere it has been determined that a risk ofcollision does not exist, everyve$elwhich hea6 appa.ently foMard of he. beam the fot ! g . a l o f a n o , h e r \ e $ e l o , w h < h c a r n o r . v o a a close-qua.ters situation with another vessel tolwrd of her bear. sha reduce f er (peed ro the minimum at which she <an be kepr on her course. She shall il nece$ary take all he. wry ottdnd in dny eve"r navrSare wrh enreme caution until danter oI collision is ovei
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Rule 19 is a different set of rules that only apply when "vessels are not in sight of one another".
THERE IS NO SUCH THING AS A STAND-ON VESSEL IN RESTRICTED VISIBILITY. Every vessel must act!
Avoid altering to port (lg(dXD) - An alteration of course to port (should be avoided) for a vessel forward of the beam, except for a vessel you are overtaking.
Avoid altering towards ( I g(dxii)) - lf a target presents a collision or close quarters risk abeam or abaft the beam you must act but avoid altering towards it.
THIS DOES NOT MEAN you cannot alter towards ANY vessel that may be abeam or abaft the beam. Rule lg(dxiD only applies if there is a collision or close quarters risk.
Use your engines - Again always remember that you should have the option of using your
engines as well as your helm.
Proceed at a safe speed - have your engines available for immediate manoeuvring.
lf you don't have radar, for whatever reason, )rou must proceed with extreme caution. Listen for sound signals and respond accordingly.
R E M E M B E R !
The COLREGS
are not just advice
to the mariner
-they are THE LAW.
lf you disobey
the law you will suffer
the consequences.
lgnorance
of the law is never a defence.
i-tJLit,[:i1,i:,
A G U ] D E
T O G O O D P R A C T I C E
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