International Regulations for the Prevention of Collision at Sea (IRPCS) Quick Quiz

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International Regulations for the Prevention of
Collision at Sea (IRPCS)Quick Quiz
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Rule 1

• Do the Rules apply in the upper reaches of a
  tidal river, e.g. on the River Fal at Truro?

Yes, this is navigable water connected with the
high seas
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Rule 3

• Do the Rules apply to seaplanes and Hovercraft?
• Does a sailing yacht which is motor-sailing count
  as a sailing vessel or as a power-driven vessel
  in the Rules?
• You are drifting with sails up but the speed
  through the water is zero. Are you under way?

Yes, they apply to all watercraft capable of
being used for transport on water.
As a power-driven vessel.
Yes, any vessel not at anchor not made fast to
the shore not aground is underway.
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Rule 5

• How often and by what means should a vessel
  maintain a look-out?

At all times, by sight, sound and all available
means. Note this rule applies to all vessels
including single-handed sailors
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Rule 6

• What is a safe speed?

A speed which will allow time for effective
action to be taken to avoid a collision. Consider
Visibility, Draught / Depth of water, Weather /
Sea State, Traffic, Hazards
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Rule 7

• What is the principal indicator that a risk of
  collision exists?

When the compass bearing of an approaching vessel
does not change.
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Rule 8

• Does the rule require any alteration of course or
  speed to avoid a collision to be large or to be
  a succession of small alterations?

Large enough to be readily apparent to another
vessel. A succession of small alterations is to
be avoided.
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Rule 9

• What special onus is put on sailing vessels and
  vessels less than 20m in length in narrow
  channels?

They must not impede the passage of a vessel
which can navigate safely only in the channel.
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Rule 10

• When you must cross a traffic separation scheme
  lane what heading should be used?

The heading should be as nearly as practicable at
right angles to the traffic flow.
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Rule 11

• Rules 12 18 apply only to vessels who are in
  sight of one another.
• True or False?

True
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Rule 12

• When two sailing vessels on opposite tacks meet
  which gives way to the other
• the vessel with the wind on the port side
• the vessel with the wind on the starboard side

?
?
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Rule 12

• When two sailing vessels on the same tack meet
  which gives way to the other
• The vessel to windward of the other
• The vessel to leeward of the other

?
?
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Rule 12

• A sailing vessel on port tack sees another
  sailing vessel ahead to windward but is not
  certain whether this yacht is on port or
  starboard tack. Does she
• stand on or take action to avoid a collision?

?
?
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Rule 13

• A fast sailing multi-hull is steadily overhauling
  a power driven cabin cruiser
• Which keeps clear?

The overtaking vessel (sail or power) keeps
clear.
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Rule 14

• When two power-driven vessels meet head
  on.Should they alter course
• To port or
• To starboard?

Each alters course to starboard
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Rule 15

• Two power-driven vessels are crossing. Who keeps
  clear
• The vessel with the other on her port side?
• The vessel with the other on her starboard side?

The vessel with the other on her starboard side.
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Rule 16

• What kind of action should be taken by the vessel
  required to keep clear?
• It should be _______and __________

early
substantial
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Rule 17

• What is the Stand-on vessel required to do?

Maintain her course and speed.
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Rule 17

• When should the stand-on vessel take action to
  avoid a collision?

When a collision cannot be avoided by the action
of the give-way vessel alone.
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Rule 18

• List the following in order of priority (first
  listed gives way to second)
• 1 Vessel restricted in ability to manoeuvre
• 2 Power driven vessel
• 3 Vessel engaged in fishing
• 4 Sailing vessel
• 5 Vessel constrained by draught

2, 4, 3, 1, 5
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Rule 19

• In restricted visibility what must all vessels
  ensure as regards their speed and means of
  propulsion?

Safe speed adapted to the prevailing
circumstances Engines ready for immediate
manoeuvre
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Rule 20

• During which of the following periods should
  navigation lights be exhibited?
• Dusk to dawn
• Sunset to sunrise
• In restricted visibility

Sunset to sunrise. In restricted visibility
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Rule 21

• Match the lights listed to their arcs of
  visibility
• Masthead light, Sidelight, Stern light, All round
  light
• 360º
• 112.5º on each side of bow
• 112.5º on one side of bow only
• 67.5º on each side of stern

All round light
Masthead light
Sidelight
Stern light
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Rule 22

• What is the minimum range of visibility of lights
  for vessels under 12metres in length?
• Masthead Sternlight 1, 2, 3 or 6 miles
• Sidelights 1, 2 or 3 miles

Masthead Sternlight 2 miles Sidelights 1 miles
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Rule 23

• Match the lengths overall to the illustrations
• A under 7m, max speed 7knots
• B 12-20m
• C under 12m

B
C
C
A
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Rule 24

• What additional lights are shown by a power
  vessel towing
• A length of tow 200m or less
• B length of tow greater than 200m?

One additional masthead light yellow towing
light at the stern
Two additional masthead lights yellow towing
light at the stern
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Rule 24

• What lights are shown by a vessel being towed?

Sidelights and a Sternlight
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Rule 25

• Which of the following light combinations are
  legal when sailing?
• A 1, 2, 3 4
• B 1
• C 2, 3 4
• D 3 4
• E 1 2

?
?
?
?
?
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Rule 25

• Which of the following light combinations are
  legal when under power?
• A 1, 2, 3 4
• B 1
• C 2, 3 4
• D 3 4
• E 1 2

?
?
?
?
?
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Rule 26

• What additional lights must a vessel engaged in
  trawling show at night?
• What shape must it show by day?

All-round green over all-round white
Two cones, apex together
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Rule 26

• What additional lights must a vessel engaged in
  fishing other than trawling show at night?
• When its gear extends more than 150m to the side
  what further additional light and shape must it
  show?

All-round red over all round white
All-round white light in the direction of the gear
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Annex II

• What lights should the following Fishing Vessels
  exhibit when fishing in Close Proximity
• Trawler shooting nets?
• Trawler hauling nets?
• Pair trawling?
• Purse seiners?
• Nets fast on an obstruction?

Two all-round white lights
All-round white over all-round red
Searchlight directed forward towards the other of
the pair
Two flashing yellow lights
Two all-round red lights
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Rule 27

• What additional lights are shown by a vessel not
  under command?
• What shape does it show by day?

Two all-round red lights
Two balls in a vertical line
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Rule 27

• What additional lights are shown by a vessel
  restricted in its ability to manoeuvre?
• What shapes does it show by day?

All-round red, white, red in a vertical line
Ball, diamond, ball in a vertical line
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Rule 27

• What lights are shown by a vessel engaged in
  dredging or underwater operations to show the
  obstructed side?
• And the clear side?

Obstructed two all-round red lights vertically
Clear two all-round green lights vertically
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Rule 27

• What additional lights are shown by a minesweeper
  at work?
• What shapes by day?

Three all-round green lights, one at the masthead
and one at the end of each yard
Three balls arranged as above
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Rule 28

• What additional lights are shown by a vessel
  constrained by her draught?
• What shape is shown by day?

Three all-round red lights
A cylinder
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Rule 29

• What additional lights are shown by a vessel on
  pilot duty?

All-round white over all-round red
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Rule 30

• What lights are shown by vessels less than 50m in
  length at anchor?
• What shape by day?
• What additional light is shown by a vessel
  greater than 50m long?

All-round white light forward
A ball forward
An all-round white light low down near the stern
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Rule 30

• What lights are shown by vessels aground?
• What shape by day?

Anchor lights plus two vertical all-round red
lights
Three balls in vertical line
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Rule 32

• How long is a short blast?
• How long is a prolonged blast?

About one second
From 4 6 seconds
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Rule 33

• What sound equipment should be carried by a
  vessel between 12 and 100m in length?
• What sound equipment should be carried by vessels
  less than 12m in length?

A whistle and a bell (plus a gong for gt100m)
What sound equipment should be carried by vessels
less than 12m in length? some other means of
making an efficient sound signal
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Rule 34

• When the Scillonian makes the following sound
  signals in good visibility what do they mean?
• One short blast
• Two short blasts
• Three short blasts
• Five or more short and rapid blasts

I am altering course to starboard
I am altering course to port
I am operating astern propulsion
What are your intentions
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Rule 34

• What do the following signals mean when made
  between vessels in a narrow channel?
• Two prolonged followed by one short blast
• Two prolonged followed by two short blasts
• One long, one short, one long one short
• One prolonged blast

I intend to overtake on your starboard side
I intend to overtake on your port side
OK go ahead (by vessel being overtaken)
given by vessels approaching blind bend
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Rule 35

• What sounds should the following vessels make in
  restricted visibility?
• A fishing vessel
• A vessel constrained by draught
• A vessel restricted in ability to manoeuvre
• A vessel not under command

One long followed by two short blasts every 2
mins Morse D Dah, Dit, Dit Keep clear of me I
am manoeuvring with difficulty
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Rule 35

• What sounds should the following vessels make in
  restricted visibility?
• Power vessel underway
• Power driven vessel stopped, not making way
• A tug
• A sailing vessel

One long blast every 2 minutes
Two long blasts every 2 minutes
One long followed by two short every 2 mins
One long followed by two short blasts every 2 mins
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Rule 35

• If you hear in fog one prolonged blast followed
  by three short blasts what would you infer?
• If you hear in fog a bell being rung rapidly for
  5 seconds every minute what would you infer?

A vessel being towed is nearby
A vessel (lt100m) at anchor is nearby
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Rule 35

• What sound signals must be made in restricted
  visibility by vessels less than 12m in length?

The normal signals as appropriate but if that is
not possible some other sound at least every 2
minutes
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Rule 37

• List as many IRPCS distress signals as you can

Gun or explosion once a minute Continuous sound
from fog signal Rockets or shells throwing red
stars SOS in Morse by any means Mayday on
radio Code flags NC
Flames (burning tar barrel) Flares (Rocket, Red,
Orange) Slowly and repeatedly raising and
lowering arms Radiotelegraph alarm signal EPIRB
signals SART signal (radar) DSC call (VHF) Square
flag and round ball