Colregs, Part C, Lights and Shapes Flashcards
Rule 20 Application
a) all weathers
b) sunrise to sunset
no other lights, except those that cannot be confused or impair/ interfere with lookout
c) Lights prescribed in this part, If carried, shall be exhibited in restricted vis as well as all other necessary circumstances
d) rules concerning shapes, by day
e) Lights specified shall comply with the provisions of Annex I
Rule 21 Definitions, a)
White Masthead light- fore and aft centreline. Unbroken
arc of horizon of 225 degrees (right ahead- 22.5 degrees abaft the beam) either side
Sidelight b)
Green STBD light, Red Port light
Unbroken arc over the horizon of 112.5 degrees, from right ahead to 22.5 degrees abaft the beam, on their respective side
< 20m, can have combined in one lantern, fore and aft centreline
Sternlight c)
White light, as nearly as practicable at the stern
Unbroken arc over the horizon of 135 degrees
From dead astern, to 67.5 degrees on each side
Towing light d)
Yellow light, same characteristics as a sternlight for each vessel
All-round light e)
light showing unbroken arc over the horizon of 360 degrees
Flashing light f)
light flashing at regular intervals of 120 flashes or more per minute
Rule 22 visibility of lights
>50m
Intensity as specified in section 8 of Annex I: to be seen from ranges of:
>50m
Masthead: 6 miles
Sidelight: 3 miles
Sternlight: 3 miles
Towing light: 3 miles
All round light (WRGY): 3 miles
Rule 22, Visibility of lights
12m or more but less than 50m
Masthead: 5 miles, except <20m, then 3 miles
Sidelight: 2 miles
Sternlight: 2 miles
Towing light: 2 miles
All round light (WRGY): 2 miles
Rule 22: visibility of lights
<12m
Masthead: 2 miles
Sidelight: 1 mile
Sternlight: 2 miles
Towing light: 2 miles
All round light (WRGY): 2 miles
Rule 22: visibility of lights
Inconspicuous or partly submerged object under tow
All round white light, 3 miles
Rule 23, Power driven vessel underway
a) PDV underway
Masthead light forward
Second light, abeam or abaft the beam, higher than fwd light. <50m shall not be obliged
Sidelights
Sternlight
Rule 23, Power driven vessel underway
b) Air cushion in non displacement mode:
same as PDV, (in addition, all round flashing yellow)
Rule 23, Power driven vessel underway
c) WIG craft
only when taking off or landing, and in flight, high intensity all round flashing red. In addition to subparagraph (a) (PDV)
Rule 23, Power driven vessel underway
d) <12m
MAY exhibit in lieu, one all round white light and side lights (no stern)
Rule 23, Power driven vessel underway
d) ii <7m, <7 knots,
in lieu of (a)may show all round white light, and if practicable, sidelights
Rule 23, Power driven vessel underway
Masthead or all round white light of PDV <12m
May be off centre provided side lights are on fore and aft centreline, in one lantern OR as nearly as practicable, on the same line as all-round or masthead light
Rule 24 towing and pushing
PDV when towing shall exhibit:
Two masthead lights in a vertical line, Instead of 23(a)
When length of tow exceeds 200m, 3 such lights
Sidelights
Sternlight
Towing light vertical above stern light
When the length of tow exceeds 200m, a diamond shape where best be seen
Rule 24 towing and pushing
Pushing vessel/vessel being pushed ahead, rigidly connected in a composite unit
Shall be regarded as ONE PDV and shall exhibit such lights as Rule 23
Rule 24 towing and pushing
PDV pushing ahead or towing alongside, NOT as a composite unit
Two masthead lights in a vertical line
Sidelights
Sternlight… NO Towing light
Rule 24 towing and pushing
PDV to which paragraph A or C of this rule complies shall:
ALSO comply with rule 23
Rule 24 towing and pushing
Vessel being towed, other than those mentioned in paragraph (g) of this rule shall exhibit:
Sidelight
Sternlight
When the length of tow exceeds 200m, a diamond shape where best be seen
Rule 24 towing and pushing
Provided that any number of vessels being towed alongside or pushed in a group shall be lighted as one vessel
a vessel being pushed ahead, not a composite:
shall exhibit only sidelights at the forward end
A vessel towed alongside shall exhibit:
Sternlight
Sidelights at the forward end
Rule 24 towing and pushing
Inconspicuous or partly submerged object being towed shall exhibit:
<25m in breadth, all round white at fwd and aft. Dracones need not show at fwd end
> 25m in breadth, two all round whites, at extremities
> 100m, more white lights, so the gap between does not exceed 100m
Diamond shape at aftermost extremity
If tow exceeds 200m, Additional diamond shape, where best be seen and far forward as possible
Rule 25, Sailing vessels and vessels under oars
Sailing vessels shall exhibit:
Sidelights and stern light
Sailing vessel (underway) may exhibit: two all round lights. Red over Green NOT IN CONJUNCTION ^^
Motor sailing: conical shape, apex downwards by day
Rule 25 Sailing vessels and vessels under oars:
sailing less than 20m
MAY exhibit: Combined lantern near top of mast
Rule 25 Sailing vessels and vessels under oars:
Sailing vessel (underway) may in addition exhibit
Two all round lights, at or near top of mast, where best be seen. Red over Green. Not in conjunction with light prescribed in subparagraph b) (combined lantern)
Rule 25 Sailing vessels and vessels under oars:
Less than 7m and under oars
If not possible to show side and stern lights, shall have White hand torch ready in sufficient time
Rule 25 Sailing vessels and vessels under oars:
Sailing vessel propelled by machinery
Conical shape forward, where best be seen, conical shape, apex downwards
Rule 26 Fishing Vessels
Underway or at anchor, ONLY the lights prescribed in this rule
Definitely making way/not making way
Cannot tell size of fishing vessel
CAN tell size of Trawling vessel
Rule 26 Fishing Vessels
Trawling vessels
Dragging through the water of a dredge net or other apparatus used as a fishing appliance:
Green over White, all round
Conical shapes, apexes pointing towards each other in a vertical line
> 50m, masthead light abaft and higher than all round green
When making way, sidelights and sternlight
Rule 26 Fishing Vessels
Fishing other than trawling
All round lights, red over white
Two cones, apexes pointing towards each other in a vertical line
Outlying gear more than 150m (horizontally)
White light in direction of gear
or
Cone, apex upwards in direction of gear
When making way: sidelights and sternlight
Rule 26 Fishing Vessels
Vessels in close proximity :
Additional signals as seen in Annex II
Rule 26 Fishing Vessels
When not engaged in fishing shall exhibit:
Lights and shapes prescribed for a vessel of her length (PDV)
Rule 27 Vessels not under command or restricted in their ability to manoeuvre:
NUC
Definitely or Definitely not making way
Can’t tell length
Two all round red lights, vertical line where best be seen
Two balls in a vertical line where best be seen
WHEN MAKING WAY, sidelights and sternlight
Rule 27 Vessels not under command or restricted in their ability to manoeuvre:
RAM, except mine clearance
Impossible to tell length of a RAM vessel unless underway
3 all round, red white red, where best be seen
Ball diamond ball, where best be seen
When making way: Masthead light/s, sidelights and stern, in addition to: ^^
When at anchor: lights or shapes prescribed in rule 30 (Anchor lights/shapes as normal)
Rule 27 Vessels not under command or restricted in their ability to manoeuvre:
PDV engaged in towing such as severely restricts her ability to deviate from her course
Ball diamond ball
Red white red
In addition to PDV Towing lights
Possibly making way
Rule 27 Vessels not under command or restricted in their ability to manoeuvre:
Engaged in dredging or underwater operations shall exhibit:
Lights and shapes prescribed in b) of this rule, in addition:
Two all round red lights/two balls on obstructed side
Two all round green lights/two diamonds on side clear to pass
When at anchor, shall exhibit THESE lights, not anchor lights as in rule 30
Therefore: if no nav lights, she could be underway floating, or at anchor!
Rule 27 Vessels not under command or restricted in their ability to manoeuvre:
Diving operations, when impracticable to exhibit Underwater operations lights shall exhibit:
Three all round light, Red White Red
+
Rigid replica of Morse flag Alpha not less than 1m in height, measures taken to ensure all round visibility
Rule 27 Vessels not under command or restricted in their ability to manoeuvre:
Mine clearance operations
In addition to PDV lights. 3 green lights black balls: one near the foremast head and one on each end of the fore yard
These lights indicate it is dangerous to enter within 1000m of this vessel
stop vessel, call master, call on radio
Rule 27 Vessels not under command or restricted in their ability to manoeuvre:
vessels less than 12m
Less than 12m need not exhibit lights as prescribed in this rule, except when engaged in diving operations
Rule 27 Vessels not under command or restricted in their ability to manoeuvre:
These lights in this rule are not:
These are not signals of distress or requiring assistance
Rule 28, Vessels constrained by their draft:
In addition to lights for a PDV, show 3 all round red lights, where best be seen
Or
A black cylinder by day
Rule 29 Pilot Vessels
Engaged in pilotage duty shall exhibit:
White over red (all round), at or near mast head
Underway, Sidelights and stern light
can not tell the size of a pilot vessel on duty, UNLESS at anchor
At anchor, lights prescribed under rule 30
Not engaged in pilotage duty, lights and shapes for a vessel of similar length
Rule 30 anchored vessels and vessels aground:
Vessel at anchor shall exhibit
At anchor, where best be seen:
In fore part, all round white light or one ball by day
At or near stern, and a lower level, all round white light
Rule 30 anchored vessels and vessels aground:
Vessel <50m at anchor
One White anchor light may be where best be seen, BALL IS STILL FWD
Rule 30 anchored vessels and vessels aground:
Vessel >100m at anchor
Any vessel, may illuminate decks. >100m, SHALL illuminate her decks
Rule 30 anchored vessels and vessels aground:
Aground
In addition to anchor lights, two all round red, or 3 balls by day
Rule 30 anchored vessels and vessels aground:
<7m at anchor, not in or near a narrow channel, fairway or anchorage, or area of normal navigation
Need not show anchor lights
Rule 30 anchored vessels and vessels aground:
<12m, when aground
Need not show aground lights, shall still exhibit anchor lights
Rule 31 Seaplanes
If it is impractical for a seaplane to show the lights prescribed in the rules of this part, she shall exhibit lights and shapes as closely similar in characteristics and position as is possible
Agreements must be approved by their government, as per rule 1(e)
