Part D - Sound and Light Signals Flashcards
Rule 32 - Define ‘short blast’ and ‘prolonged blast’
- Short blast - about 1 second duration
- Prolonged blast - 4 to 6 second duration
Rule 33 - Equipment for Sound Signals
- Vessel 12m or more provided with a whistle
- Vessel of 20m or more in length provided with a bell and whistle
- Vessel of 100m or more in length shall be provided with a bell, whistle and gong.
Rule 34 - Manoeuvring and Warning Signals
Power driven vessels in sight of one another.
- One short blast - I am altering my course to starboard
- Two short blasts - I am altering my course to port
- Three short blasts - I am operating astern propulsion
Same for light signals.
Rule 34 - Manoeuvring and Warning Signals
Power driven vessels in sight of one another in a narrow channel, vessel intending to overtake on starboard side
- Comply with rule 9
- Two prolonged blasts followed by one short blast - I intend to overtake on your starboard side
Rule 34 - Manoeuvring and Warning Signals
Power driven vessels in sight of one another in a narrow channel, vessel intending to overtake on port side
- Comply with rule 9
- Two prolonged blasts followed by two short blasts - I intend to overtake on your port side
Rule 34 - Manoeuvring and Warning Signals
Power driven vessels in sight of one another in a narrow channel, vessel about to be overtaken when in agreement
- Comply with rule 9
- One prolonged, one short, one prolonged, one short blast
Rule 34 - Manoeuvring and Warning Signals
Power driven vessels in sight of one another in a narrow channel, vessel(s) fail to understand each other
- When there is doubt to the intentions from either vessel, 5 short rapid blasts.
- Can be supplemented by a light signal.
Rule 34 - Manoeuvring and Warning Signals
Power driven vessels in sight of one another in a narrow channel, vessels obscured
- One prolonged blast
- Answered with one prolonged blast
Rule 35 - Sound Signals in Restricted Visibility
Power-drven vessel making way through the water
- One prolonged blast at intervals of not more than 2 minutes
Rule 35 - Sound Signals in Restricted Visibility
Power-drven vessel underway but stopped
- Two prolonged blasts in succession at intervals not more than 2 minutes
- 2 secs between them
Rule 35 - Sound Signals in Restricted Visibility
Not under command, restricted in her ability to manoeuvre, constrained by draught, sailing vessel, engaged in fishing and engaged in towing or pushing.
- One prolonged blast and two short blasts in succession, at intervals no more than 2 minutes.
Rule 35 - Sound Signals in Restricted Visibility
Vessel engaged in fishing at anchor and Restricted in her ability to manoeuvre at anchor
- One prolonged blast and two short blasts in succession, at intervals no more than 2 minutes.
Rule 35 - Sound Signals in Restricted Visibility
A vessel towed, if manned
- Intervals not more than 2 minutes, sound 1 prolonged followed by 3 short blasts.
- Can be supplemented by light signals of the same.
Rule 35 - Sound Signals in Restricted Visibility
A vessel at anchor
- Ring the bell rapidly for about 5 secs
Rule 35 - Sound Signals in Restricted Visibility
A vessel at anchor of 100m or more in length
- Ring the bell rapidly in the fore part of the vessel
- Immediately after the bell, the gong shall be sounded rapidly for about 5 secs in the after part.
- May in addition sound 1 short blast, 1 prolonged and 1 short blast, to give warning of her position and of the possibility of collision to an approaching vessel.
