COLREGs - Lights & Day Signals

Question 1

What is the use of this Day Signal?

Answer 1

A vessel is at anchor

Question 2

What is the use of this Day Signal?

Answer 2

A sailing vessel is under power by her own machinery

Question 3

What is the use of this Day Signal?

Answer 3

A vessel engaged in towing with a length of tow that exceeds 200m OR a inconspicuous / submersible object being towed

Question 4

What is the use of this Day Signal?

Answer 4

A vessel engaged in fishing OR a vessel engaged in trawling

Question 5

What is the use of this Day Signal?

Answer 5

A vessel is not under command

Question 6

What is the use of this Day Signal?

Answer 6

A vessel is engaged in mine clearance operations

Question 7

What is the use of this Day Signal?

Answer 7

A vessel is restricted in her ability to manoeuvre

Question 8

What is the use of this Day Signal?

Answer 8

A vessel constrained by her draught

Question 9

What is the use of this Day Signal?

Answer 9

A vessel aground

Question 10

What is the use of this Day Signal?

Answer 10

A vessel restricted in her ability to manoeuvre engaged in underwater operations - hazard to the left and clear to pass to the right

Question 11

What is the use of this Day Signal?

Answer 11

A vessel engaged in fishing other than trawling with outlying gear extending more than 150m horizontally from the vessel

Question 12

What is the use of this Additional Signal for vessels engaged in trawling?

Answer 12

ZULU - I am shooting my nets

Question 13

What is the use of this Additional Signal for vessels engaged in trawling?

Answer 13

GOLF - I am hauling my nets

Question 14

What is the use of this Additional Signal for vessels engaged in trawling?

Answer 14

PAPA - My nets are stuck fast upon an underwater obstruction

Question 15

Describe the dimensions of this Shape…

Answer 15

Diameter of NOT LESS than 0.6 metres

Question 16

Describe the dimensions of this Shape…

Answer 16

Base diameter NOT LESS than 0.6 metres
Height EQUAL to the diameter

Question 17

Describe the dimensions of this Shape…

Answer 17

Diameter NOT LESS than 0.6 metres
Height TWICE the diameter

Question 18

Describe the dimensions of this Shape…

Answer 18

Consists of 2 CONES
Therefore:
Base diameter NOT LESS than 0.6 metres
Height will be TWICE the diameter

Question 19

What is the minimum vertical separation between shapes?

Answer 19

The vertical distance between shapes shall be at least 1.5 metres

Question 20

What is the arc of visibility of a MASTHEAD LIGHT?

Answer 20

225° (see from right ahead to 22.5° abaft her beam)

Question 21

What is the arc of visibility of a SIDELIGHT?

Answer 21

112.5° (see from right ahead to 22.5° abaft her beam either side)

Question 22

What is the arc of visibility of a STERN LIGHT?

Answer 22

135° (see from right astern to 22.5° abaft her beam)

Question 23

What is the arc of visibility of a TOWING LIGHT?

Answer 23

Same as a Stern Light
Therefore:
135° (see from right astern to 22.5° abaft her beam)

Question 24

What is the arc of visibility of an ALL ROUND LIGHT?

Answer 24

360°

Question 25

What is the rate of a FLASHING LIGHT?

Answer 25

120 flashes or more per minute

Question 26

What is the visibility of lights for a VESSEL OF 50 METRES OR MORE in length?

Answer 26

Masthead = 6 MILES
Sidelight = 3 MILES
Stern Light = 3 MILES
Towing Light = 3 MILES
White, Red, Green or Yellow All-Round Light = 3 MILES

Question 27

What is the visibility of lights for a VESSEL OF 12 METRES OR MORE BUT LESS THAN 50 METRES in length?

Answer 27

Masthead = 5 MILES OR 3 MILES (if the vessel is less than 20 metres in length)
Sidelight = 2 MILES
Stern Light = 2 MILES
Towing Light = 2 MILES
White, Red, Green or Yellow All-Round Light = 2 MILES

Question 28

What is the visibility of lights for a VESSEL LESS THAN 12 METRES in length?

Answer 28

Masthead = 2 MILES
Sidelight = 1 MILE
Stern Light = 2 MILES
Towing Light = 2 MILES
White, Red, Green or Yellow All-Round Light = 2 MILES