COLREGs Sound Signals Flashcards by Oscar Brann

Q

PDV (Underway & Making Way) - Restricted Vis

A

One prolonged blast (at an interval of not more than 2 minutes)

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Q

How long is 1 short blast?

A

1 second

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Q

How long is 1 prolonged blast?

A

4-6 seconds

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Q

PDV (Underway & NOT Making Way) - Restricted Vis

A

Two prolonged blasts (at an interval of not more than 2 minutes)

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Q

NUC (Underway) - Restricted Vis

A

One prolonged blast followed by two short blasts (at an interval of not more than 2 minutes)

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Q

Towing Vessel (Underway) - Restricted Vis

A

One prolonged blast followed by two short blasts (at an interval of not more than 2 minutes)

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Q

RAM (Underway or at Anchor) - Restricted Vis

A

One prolonged blast followed by two short blasts (at an interval of not more than 2 minutes)

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Q

Fishing (Underway or at Anchor) - Restricted Vis

A

One prolonged blast followed by two short blasts (at an interval of not more than 2 minutes)

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Q

CBD (Underway) - Restricted Vis

A

One prolonged blast followed by two short blasts (at an interval of not more than 2 minutes)

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Q

Sailing Vessel (Underway) - Restricted Vis

A

One prolonged blast followed by two short blasts (at an interval of not more than 2 minutes)

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Q

Vessel being towed (mandatory if manned) - Restricted Vis

A

One prolonged blast followed by three short blasts (at an interval of not more than 2 minutes)

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Q

Vessel at anchor (<100m) - Restricted Vis

A

5 seconds of rapid ringing of the ships bell in a 2 minute period

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Q

Vessel at anchor (>100m) - Restricted Vis

A

5 seconds of rapid ringing of the ships bell followed by 5 seconds of rapid ringing of the gong in a 2 minute period

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Q

Vessel Aground (Restricted Vis)

A

3 strokes on the bell, followed by 5 seconds of rapid ringing of the bell, followed by 3 strokes on the bell in a 1 minute period.

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Q

Pilot vessel (Restricted Vis)

A

4 short blasts on the ships whistle in a 2 minute period

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Q

Additional warning signal for a vessel at anchor - Restricted Vis

A

One short blast, followed by one prolonged blast, followed by one short blast. In a 1 minute period

Q

Turning to Starboard (In Sight)

A

One short blast

Q

Turning to port (In Sight)

A

2 short blasts

Q

Operating Astern Propulsion (In Sight)

A

3 short blasts

Q

Unclear if your intentions (In Sight)

A

5 or more short and rapid blasts of the ships whistle

Q

I intend to overtake on your starboard side (R.9)

A

2 prolonged blasts, followed by one short blast

Q

I intend to overtake on your port side (R.9)

A

2 prolonged blasts followed by 2 short blasts

Q

Charlie / affirmative / I agree to your overtake

A

One prolonged blast followed by one short blast, followed by one prolonged blast, followed by one short blast