COLREG Sound Signals

Question 1

What is a short blast?

Answer 1

One second duration

Question 2

Prolongued blast?

Answer 2

Blastvif around 4 to 6 seconds

Question 3

What vessels have whistles?

Answer 3

Vessels of 12m or more

Question 4

One short blast?

Answer 4

I am altering course to starboard

Question 5

Two short blasts?

Answer 5

I am altering my course to port

Question 6

Three short blasts?

Answer 6

I am operating astern propulsion

Question 7

When in a narrow channel, intention of overtaking by starboard side is?

Answer 7

2 prolonged blasts and the 1 short blast

Question 8

When in a narrow channel, intention to pass by the port side?

Answer 8

2 prolonged blasts then 2 short blasts

Question 9

In a narrow channel, vessel being overtaken agrees how?

Answer 9

One long, one short, one long, one short

Question 10

When in doubt of a vessels intentions?

Answer 10

5 short and rapid blasts of the whistle

Question 11

Vessel nearing a bend in a channel or fairway should do what a receive what ?

Answer 11

Sound 1 prolonged blast

Recieve 1 prolonged blast by a vessel approaching

Question 12

If whistles are fitted over 100m apart then?

Answer 12

Then only 1 is used for giving maneuvering and warning signals

Question 13

Rule 32

Answer 13

The word whistle means any sounds signalling appliance capable of producing the prescribed blasts which comply with the specifications in annex 3 to these regulations

Question 14

Sounds signals in restricted visibility?

Answer 14

In or near an area of restricted visibility. Whether by day or night

Question 15

Pdv in restricted visibility?

Answer 15

Making way, sound at intervals of not more than 2 minutes- 1 prolonged blast
Underway but not stopped and making no way, sound at intervals of not more than 2 minutes - 2 prolonged blasts in succession with an interval of 2 seconds

Question 16

One prolonged and two short? Restricted vis

Intervals of not more than 2 minutes

Answer 16

NUC
CBD
RAM
Sailing vessel
Vessel engaged in fishing 
Vessel engaged in towing

Question 17

If at anchor, vessels engaged in fishing, RAM shall?Restricted vis

Answer 17

1 prolonged and 2 short

Question 18

If a vessel is bring towed or more than one being towed, the last if manned shall?Restricted vis

Answer 18

Intervals of not more than 2 minute, one prolonged then 3 short, immediately after towing vessels signal

Question 19

Pushing vessel or vessel being pushed?Restricted vis

Answer 19

Regarded as a power driven vessel,
Follow rules a or b,
One prolonged if making way
2 prolonged if underway but not stopped

Question 20

Vessel at anchor?Restricted vis

Answer 20

Intervals of not more than a minute
Ring the bell rapidly for 5 seconds
If vessel is larger than 100m - Bell sounded at forepart of vessel then immediately after, gong is sounded in the after part of the vessel for 5 seconds.
Also can do 1 short, long , one short to give warning

Question 21

Vessel aground?Restricted vis

Answer 21

Give the bell signal and if required the gong.
Also 3 separate abs distinct strokes on the bell immediately before and after the rapid ringing of the bell.
Vessel of between 12 and 20m is not obliged to give the gong signal but will have to give an efficient sound signal at intervals of not more than 2 minutes

Question 22

Pilot vessel? Restricted vis

Answer 22

4 short blasts

Question 23

Vessel less than 12m?

Answer 23

Not obliged to give the bell signal at anchor during restricted visibility but must make another efficient sound signal at interval of not more than 2 minutes

Question 24

Rule 36? It’s title?

Answer 24

Signals to attract attention

Question 25

Rule 37, its title?

Answer 25

Distress signals

Question 26

Rule 35, its title?

Answer 26

Sound signals in restricted visibility

Question 27

Rule 34, its title?

Answer 27

Manoeuvering and warning signals

Question 28

Rule 33, its title?

Answer 28

Equipment for sound signals

Question 29

Rule 32, its title?

Answer 29

Definitions