COLLISION REGULATIONS PART D: Sound and Light Signals

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Questions and Answers

Match the following vessel lengths with their corresponding sound signaling devices:

< 12m = some type of sound signaling device < 100m = whistle and bell

= 100m = whistle, bell, and gong any length = no sound signaling device required

Match the following maneuvers with their corresponding whistle signals:

Altering course to starboard = one short blast Altering course to port = two short blasts Operating astern propulsion = three short blasts Stopped = no whistle signal required

Match the following terms with their definitions according to Rule 32 of Collision Regulations:

Whistle = Any sound signalling appliance capable of producing the prescribed blasts Short blast = A blast of from four to six seconds' duration Prolonged blast = A blast of about one second's duration Gong = A signal exchanged by a power-driven vessel and another vessel

Match the following equipment with their respective uses:

<p>Whistle = used on vessels &gt;= 100m in length Bell = used on vessels &lt; 100m in length Gong = used on vessels &gt;= 100m in length Some type of sound signaling device = used on vessels &lt; 12m in length</p> Signup and view all the answers

Match the following vessels with their required sound signal equipment according to Rule 33:

<p>Vessel of 12 metres or more in length = Whistle Vessel of 20 metres or more in length = Bell and whistle Vessel of 100 metres or more in length = Whistle, bell, and gong Vessel of 5 metres or more in length = Bell</p> Signup and view all the answers

Match the following statements with their correct explanations:

<p>Operating astern propulsion means moving astern = false A power-driven vessel must indicate its maneuver with a whistle signal = true A vessel &lt; 12m in length must carry a whistle = false A vessel &gt;= 100m in length must carry a bell and a whistle = true</p> Signup and view all the answers

Match the following signals with their descriptions according to Rule 32:

<p>Whistle = A signal exchanged by a power-driven vessel and another vessel Signal of action = Signals sounded upon rudder order International Rule signal = Signals exchanged if vessels are 'in sight' and maneuvering is required Rudder order signal = Signals sounded by a vessel in an area of restricted visibility</p> Signup and view all the answers

Match the following terms with their descriptions according to Rule 33:

<p>Whistle = Complies with the specifications in Annex III Bell = Used in addition to a whistle on vessels of 20 metres or more in length Gong = Used in addition to a bell and whistle on vessels of 100 metres or more in length Rudder = Used to steer a vessel</p> Signup and view all the answers

Match the following vessel lengths with their respective sound signaling requirements:

<p>&lt; 12m = no specific requirement &lt; 100m = whistle and bell required</p> <blockquote> <p>= 100m = whistle, bell, and gong required any length = no sound signaling device required</p> </blockquote> Signup and view all the answers

Match the following whistle signals with their respective meanings:

<p>One short blast = altering course to starboard Two short blasts = altering course to port Three short blasts = operating astern propulsion No whistle signal = vessel is stopped</p> Signup and view all the answers

Match the following situations with the sound signals used according to Rule 34:

<p>Vessels in sight of one another = International Rule signals Vessels in an area of restricted visibility = Signals sounded upon rudder order Vessels maneuvering = Signals exchanged between vessels Vessels in a narrow channel = Signals sounded by a power-driven vessel</p> Signup and view all the answers

Match the following vessels with their additional sound signal equipment according to Rule 33:

<p>Vessel of 20 metres or more in length = Bell Vessel of 100 metres or more in length = Gong Vessel of 12 metres or more in length = Gong Vessel of 5 metres or more in length = Bell and gong</p> Signup and view all the answers

Match the situations with the corresponding sound signals in restricted visibility:

<p>A vessel at anchor = Ringing the bell rapidly for about 5 seconds A pushing vessel and a vessel being pushed ahead = Signals prescribed in paragraphs (a) or (b) of Rule 35 A vessel aground = Three separate and distinct strokes on the bell before and after the rapid ringing of the bell A power-driven vessel = No specific sound signal mentioned</p> Signup and view all the answers

Match the signals with the corresponding vessels in restricted visibility:

<p>Ringing the bell rapidly for about 5 seconds = A vessel at anchor Signals prescribed in paragraphs (a) or (b) of Rule 35 = A pushing vessel and a vessel being pushed ahead Three separate and distinct strokes on the bell before and after the rapid ringing of the bell = A vessel aground No specific sound signal mentioned = A power-driven vessel</p> Signup and view all the answers

Match the vessels with the corresponding signals in restricted visibility:

<p>A vessel at anchor = Ringing the bell and gong in forepart and after part of the vessel A pushing vessel and a vessel being pushed ahead = Signals prescribed in paragraphs (a) or (b) of Rule 35 A vessel aground = Three separate and distinct strokes on the bell before and after the rapid ringing of the bell and an appropriate whistle signal A power-driven vessel = No specific sound signal mentioned</p> Signup and view all the answers

Match the signals with the corresponding descriptions in restricted visibility:

<p>Ringing the bell rapidly for about 5 seconds = To give warning of her position and of the possibility of collision to an approaching vessel Signals prescribed in paragraphs (a) or (b) of Rule 35 = For a power-driven vessel Three separate and distinct strokes on the bell before and after the rapid ringing of the bell = For a vessel aground Three blasts in succession (one short, one prolonged and one short blast) = To give warning of her position and of the possibility of collision to an approaching vessel</p> Signup and view all the answers

Match the situations with the corresponding additional signals in restricted visibility:

<p>A vessel at anchor = Three blasts in succession (one short, one prolonged and one short blast) A pushing vessel and a vessel being pushed ahead = No additional signal mentioned A vessel aground = An appropriate whistle signal A power-driven vessel = No specific additional signal mentioned</p> Signup and view all the answers

Match the vessels with the corresponding parts of the vessel where the bell is sounded in restricted visibility:

<p>A vessel at anchor = Forepart of the vessel A pushing vessel and a vessel being pushed ahead = No specific part of the vessel mentioned A vessel aground = Forepart and after part of the vessel A vessel of 100 metres or more in length = Forepart of the vessel</p> Signup and view all the answers

Match the following vessel lengths with their corresponding sound signal intervals:

<p>Less than 12 metres = Not more than 2 minutes 12 metres or more but less than 20 metres = Not more than 2 minutes 20 metres or more = No specific interval Pilot vessel = No specific interval</p> Signup and view all the answers

Match the following vessels with their sound signal obligations:

<p>Vessel of 12 metres or more but less than 20 metres = Not obliged to give bell signals Vessel of less than 12 metres = Not obliged to give any signals Pilot vessel = Additional identity signal All vessels = Obliged to give bell signals</p> Signup and view all the answers

Match the following sound signals with their vessels:

<p>Bell signals = Vessel of 12 metres or more but less than 20 metres Efficient sound signal = Vessel of less than 12 metres Four short blasts = Pilot vessel Whistle signals = All vessels</p> Signup and view all the answers

Match the following situations with their sound signal requirements:

<p>Restricted visibility = Efficient sound signal at intervals of not more than 2 minutes Pilotage duty = Additional identity signal Daytime = No sound signals required Anchored vessel = Special anchor signal</p> Signup and view all the answers

Match the following vessels with their sound signal exemptions:

<p>Vessel of less than 12 metres = Exempt from bell signals Vessel of 12 metres or more but less than 20 metres = Exempt from whistle signals Pilot vessel = Exempt from all sound signals All vessels = No exemptions</p> Signup and view all the answers

Match the type of vessel with the sound signal it should make in restricted visibility:

<p>A vessel not under command = One prolonged followed by two short blasts A power-driven vessel underway but stopped and making no way through the water = Two prolonged blasts in succession A vessel towed = One prolonged followed by three short blasts A vessel engaged in fishing, when at anchor = One prolonged blast</p> Signup and view all the answers

Match the type of vessel with the sound signal it should make in restricted visibility:

<p>A sailing vessel = Three blasts in succession, namely one prolonged followed by two short blasts A vessel restricted in her ability to manoeuvre = Two prolonged blasts in succession A vessel engaged in towing or pushing another vessel = One prolonged blast followed by two short blasts A vessel constrained by her draught = One prolonged blast followed by three short blasts</p> Signup and view all the answers

Match the type of vessel with the sound signal it should make in restricted visibility:

<p>A vessel towed or if more than one vessel is towed the last vessel of the tow = Four blasts in succession, namely one prolonged followed by three short blasts A vessel engaged in fishing, when at anchor = Three blasts in succession, namely one prolonged followed by two short blasts A vessel restricted in her ability to manoeuvre when carrying out her work at anchor = One prolonged followed by two short blasts A power-driven vessel underway but stopped and making no way through the water = One prolonged blast followed by two short blasts</p> Signup and view all the answers

Match the type of vessel with the sound signal it should make in restricted visibility:

<p>A vessel engaged in towing or pushing another vessel = Three blasts in succession, namely one prolonged followed by two short blasts A power-driven vessel underway but stopped and making no way through the water = Two prolonged blasts in succession A vessel not under command = One prolonged blast followed by three short blasts A vessel constrained by her draught = Four blasts in succession, namely one prolonged followed by three short blasts</p> Signup and view all the answers

Match the type of vessel with the sound signal it should make in restricted visibility:

<p>A vessel engaged in fishing = One prolonged blast followed by two short blasts A vessel restricted in her ability to manoeuvre = Three blasts in succession, namely one prolonged followed by two short blasts A sailing vessel = Four blasts in succession, namely one prolonged followed by three short blasts A vessel towed or if more than one vessel is towed the last vessel of the tow = Two prolonged blasts in succession</p> Signup and view all the answers

Match the type of vessel with the sound signal it should make in restricted visibility:

<p>A vessel engaged in fishing, when at anchor = Three blasts in succession, namely one prolonged followed by two short blasts A vessel restricted in her ability to manoeuvre when carrying out her work at anchor = One prolonged followed by two short blasts A power-driven vessel underway but stopped and making no way through the water = Four blasts in succession, namely one prolonged followed by three short blasts A vessel not under command = Two prolonged blasts in succession</p> Signup and view all the answers

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Study Notes

Sound Signaling Devices

  • Vessels under 12 meters - Whistle, bell
  • Vessels 12 meters or more - Whistle, bell, and a "shape suitable for day signaling" (often a flag)

Whistle Signals

  • One short blast - "I am altering my course to starboard"
  • Two short blasts - "I am altering my course to port"
  • Three short blasts - "My engines are going astern"

Rule 32 Terms

  • "Sound signals" - Any audible signal used to communicate between ships, including whistles, bells, gongs, and fog horns.
  • "Short blast" - A signal of approximately one second duration.
  • "Prolonged blast" - A signal of approximately four to six seconds duration.

Sound Signal Equipment

  • Whistle - Used to communicate between vessels and in restricted visibility conditions
  • Bell - Used in restricted visibility conditions
  • "Shape suitable for day signaling" - A flag or other device used for communication during the day

Vessels and Sound Signal Equipment

  • Vessels under 12 meters - Must have a whistle and a bell
  • Vessels 12 meters or more - Must have a whistle, a bell, and a shape suitable for day signaling

Sound Signal Explanations

  • Short blasts - Used to indicate a change in course
  • Prolonged blasts - Used for various purposes, such as warning of danger or indicating a vessel's location

Situations and Sound Signals

  • Making way - Two short blasts
  • Not under command - Three short blasts
  • Underway and engaged in fishing - Five short blasts
  • Vessel constrained by her draught - One prolonged blast followed by two short blasts

Restricted Visibility Situations and Sound Signals

  • vessel proceeding at low speed - "slow .. " followed by a prolonged blast
  • vessel stopped and making way - "stopped .. " followed by prolonged blast
  • vessel making way and unable to observe direction - "not observing .. " followed by prolonged blast
  • vessel not under command - "not under command .. " followed by prolonged blast
  • vessel constrained by her draught - "constrained by her draught .. " followed by prolonged blast
  • vessel aground - "aground .. " followed by prolonged blast

Vessel Length and Sound Signal Intervals

  • Vessels under 12 meters - One short blast for each second
  • Vessels 12 meters or more - Two short blasts for each second

Vessel Sound Signal Obligations

  • Vessels making way - Must sound their whistles
  • Vessels not under command - Must sound their whistles
  • Vessels constrained by their draught - Must sound their whistles

Sound Signal Vessels

  • Vessels under 12 meters - Use a whistle and bell
  • Vessels 12 meters or more - Use a whistle, bell, and shape suitable for day signaling

Situations and Sound Signal Requirements

  • Vessels approaching each other head-on - Both vessels should sound short blasts to signal their intent to pass port-to-port
  • Vessels overtaking another vessel - The overtaking vessel should sound short blasts to indicate their intent to pass
  • Vessels changing course - Should sound short blasts to indicate their intended new course

Vessel Sound Signal Exemptions

  • Vessels at anchor - Not required to sound whistles unless there's a danger of collision
  • Vessels fishing - May use "fishing gear in use" signals instead of general whistle signals

Vessel Type and Sound Signal in Restricted Visibility

  • Vessels underway - "slow" or "stopped" followed by a prolonged blast
  • Vessels not under command - "not under command" followed by prolonged blast
  • Vessels constrained by draught - "constrained by her draught" followed by prolonged blast
  • Vessels aground - "aground" followed by prolonged blast

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