Sound Signals

Question 1

How long is a short blast?

Answer 1

One second’s duration

Question 2

How long is a long blast?

Answer 2

Four to sex second’s duration

Question 3

One short blast?

Answer 3

I am altering my course to starboard

Question 4

Two short blasts?

Answer 4

I am altering my course to port

Question 5

Three short blasts?

Answer 5

I am operating astern propulsion

Question 6

Overtaking in narrow channel or fairway
Two prolonged one short?

Answer 6

I intend to overtake you on your
starboard side

Question 7

Overtaking in narrow channel or fairway
Two prolonged two short?

Answer 7

I intend to overtake you on your
port side

Question 8

What does the vessel being over taken in narrow channel or fairway sound?

Answer 8

Morse C
-.-.

Question 9

Five short blasts?

Answer 9

Failure to understand the intentions or actions of the other, or is in doubt whether sufficient action is being taken by the other to avoid collision

Question 10

Sound signal for nearing a bend in channel or a fairway?

Answer 10

One prolonged blast
Shall be answered with one prolonged blast that may be around the bend

Question 11

Sound signals for power driven vessel making way in restricted vis?

Answer 11

One prolonged at intervals not exceeding 2 miniutes

Question 12

Sound signals for power driven vessel underway not making way in restricted vis?

Answer 12

Two prolonged at intervals not exceeding 2 minutes

Question 13

Sound signals for vessels other than power driven in restricted vis?

Answer 13

One prolonged two short at intervals not exceeding 2 minutes

Question 14

Sound signals for a vessel engaged in fishing at anchor or RAM when carrying out her work at anchor?

Answer 14

One prolonged two short at intervals not exceeding 2 minutes

Question 15

Sound signals for Tow in restricted vis?

Answer 15

Towing vessel: One prolonged two short at intervals not exceeding 2 minutes
Vessel being towed (if manned): One prolonged three short at intervals not exceeding 2 minutes straight after the towing vessel

Question 16

Sound signals for Pushing in restricted?

Answer 16

Same as power driven vessels

Question 17

Sound signals for a vessel at anchor in restricted vis? (under 100m)

Answer 17

Rapid ringing of the bell for 5 seconds at intervals not exceeding one minute
May also sound Morse R .-. to give warning of her position and of the possibility of collision to an approaching vessel.

Question 18

Sound signals for a vessel at anchor in restricted vis? (100m+)

Answer 18

Rapid ringing of the bell for 5 seconds in the forepart of the vessel and followed by 5 seconds of the gong in the after part of the vessel at intervals not exceeding one minute.
May also sound Morse R .-. to give warning of her position and of the possibility of collision to an approaching vessel.

Question 19

Sound signals for vessel aground in restricted vis? (under 100m)

Answer 19

3 distinct strokes on the bell - 5 seconds rapid ringing of the bell - 3 distinct strokes of the bell at intervals not exceeding one minute.
May also sound Morse L .-.. (you should stop your vessel immediately) and Morse U ..- (you are running in to danger)

Question 20

Sound signals for vessel aground in restricted vis? (100m+)

Answer 20

3 distinct strokes on the bell - 5 seconds rapid ringing of the bell - 3 distinct strokes of the bell - 5 seconds of the gong at intervals not exceeding one minute.
May also sound Morse L .-.. (you should stop your vessel immediately) and Morse U ..- (you are running in to danger)

Question 21

Sound signals in restricted vis for vessels less than 20m?

Answer 21

Not obliged to make above mentioned sounds but if she does not some other efficient sound signal at intervals not exceeding 2 minutes.

Question 22

Sound signal for a pilot vessel in restricted vis?

Answer 22

Same as power driven vessels.
May in addition also sound four short blasts.