Sound signals in shipping

In shipping many sound signals are used. Each sound signal has its own significance. There is for example a stay-away signal, there are signals when meeting and passing on signals.

Sound signals

First, a few small rules messaging:
  • A short burst lasts about 1 second
  • A long blast takes about 4 to 6 seconds
  • The time between 2 bumps is approximately 1 second
  • A series consists very short bursts of at least six short blasts of 1/4 second with an interval of 1/4 second
  • A series of chimes takes about four seconds. (Instead of clock strokes of sets of layers may also be metal-to-metal

  • + = One ring
  • - = A short burst
  • - = A long blast
  • _ = Peace

General signals

  • One prolonged blast = "attention"
  • One short blast = "I'm going to starboard"
  • Two short punches = "I go from port"
  • Three short blasts = "I astern"
  • 4 short punches = "I can not maneuver"
  • series of very short blasts = "There is danger of collision
  • Repeated prolonged blasts = Distress Signal
  • series chimes Distress Signal = = + _ + _ + _ + _ +

Stay-away signal

The stay-away signal be at least 15 minutes of uninterrupted short-long CW. At the same time, there is shown a yellow light. Thus: - - - - - - - - - - - -
  • Ships moored or at anchor are to be left in the danger zone. Measures should be taken to avoid the impending danger. The skipper who hears the stay-away signal, should as far as possible inform the nearest authorities.
  • Ships stay-away signal perception, visibility must remove from the danger zone as quickly as possible. Measures should be taken on board: close windows, no smoking, auxiliary engines off, avoid sparkler
  • The stay-away signal can be given to an event or incident involving a hazardous substance could be released.

Signals to meet

Two ships meet as they sail towards each other. They are so oncoming traffic. These signals are used as an example ship sails on the wrong side of the fairway, or at sea.
Intention to meet port to port:
Question of the ship that will sail past:
  • One short blast = "I want to port to port sail past"

Reply of the ship being overhauled:
  • One short blast = "You can port to port sail past"
  • or: two short blasts = "No, you have to pass starboard to starboard sail"

Reply goeth:
  • Two short punches = "I will pass starboard to starboard sail"

Intention to meet starboard to starboard
Question of the ship that will sail past:
  • Two short punches = "I want to starboard to starboard sail past"

Reply of the ship being overhauled:
  • Two short punches = "You starboard to starboard sail past"
  • Or: one short blast = "No, you have to sail by port to port"

Reply goeth:
  • One short blast = "I will sail past port to port"

Signals at passing

Beyond Walking occurs when one ship to the other catches up.
Intention to pass on the port side of the opgelopene
Question of the ship that would incur:
  • Two long blasts followed by two short blasts = "I want to pass on the port side"

Reply opgelopene:
  • no sound signal = "Please pass on my port side"
  • or: two short blasts = "No, you must pass on my starboard"

Reply oploper:
  • One short blast = "I'll pass you to starboard"

Intention to pass to starboard of the opgelopene:
Question of the ship that would incur:
  • Two long blasts followed by one short blast = "I want to pass to starboard"

Reply opgelopene:
  • no sound signal = "Please pass on my starboard"
  • Or: one short blast = "No, you must pass on my port side"

Reply oploper:
  • Two short punches = "I will walk past you on the port"

Signals at the times

If a ship has to turn into a fairway he can notify his surroundings know using sound signals:
  • One long blast followed by one short blast = "I'm going to turn over starboard"
  • One long blast followed by two short blasts = "I'm going to turn to port"

Signal when entering or leaving harbors and secondary waterways

If a ship from a port or secondary waterway is he is not always well seen by the other shipping traffic. To clarify these ships what he plans, he can give the following signals:
  • Three long blasts followed by one short blast = "I'm going to starboard"
  • Three prolonged blasts followed by two short blasts = "I go from port"
  • Three prolonged blasts = "I'm crossing"

Signs in poor visibility

For example, in poor visibility due to fog or heavy rain, it is necessary to give sound signals so that the ships of each other know what they are about.
Radar sailing ships:
A vessel or assembly, which perceives the screen vessels whose position or behavior to a dangerous situation could result, or that part of the fairway approaching where ships could find that are not visible on the screen. Gives as often as necessary one prolonged blast. A sailing ferry gives as often as necessary one long blast followed by four short blasts.
Without radar sailing ships
A vessel or assembly gives incessantly at intervals of one minute one prolonged blast. A sailing ferry gives incessantly at intervals of one minute one long blast followed by four short blasts.

Signals during the inactivity

A vessel, pushed convoy or linked assembly are stationary in the fairway or in its vicinity on a dangerous place or fixed hazards:
  • stretched along the side of the waterway: to give an answer signal on the signal of an approaching ship
  • not stretched along the side of the fairway: sound at intervals of not more than 1 minute
  • a series of chimes: + + + + + + + _ _ _
  • Or: one short blast followed by one long blast followed by one short blast again

This signal should only be given by a ship coming directly from the sea or directly go to sea.
Comments (1)
29-12-2017

Dear, Do you know if there are stickers for sale bearing the acoustic signals and their meaning?