International Dictionary of Marine Aids to Navigation - User contributions [en]

Differential system

2024-09-17T05:58:23Z

Minsuids:

An augmentation system whereby radio-navigation signals are monitored at a known position and the corrections so determined are transmitted to users in the coverage area.

DGPS: Differential Global Positioning System
DR-Mode: Differential Ranging Mode

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{{languages|Differential system}}
[[Category:10.1 General e-Navigation terms]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 2009 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

Differential R-Mode (DR-Mode)

2024-09-17T05:57:26Z

Minsuids: Created page with "Differential R-Mode (DR-Mode) is a differential system for R-Mode. It is an optional extension. {{IALAFooter}} {{languages|A-N Radio range}} Category:4.4 Other Radio Navigation Systems Category:Alphabetical Index Category:IALA Dictionary 1970-89 Edition Category:IALA Dictionary 2023 Revision"

Differential R-Mode (DR-Mode) is a differential system for R-Mode. It is an optional extension.

{{IALAFooter}}

{{languages|A-N Radio range}}
[[Category:4.4 Other Radio Navigation Systems]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

Ranging Mode (R-Mode)

2024-09-17T05:56:13Z

Minsuids: Created page with "Ranging Mode (R-Mode) is a maritime positioning and timing system that uses radio infrastructure to transmit synchronised radio signals in frequency bands which are allocated to maritime usage. {{IALAFooter}} {{languages|A-N Radio range}} Category:4.4 Other Radio Navigation Systems Category:Alphabetical Index Category:IALA Dictionary 1970-89 Edition Category:IALA Dictionary 2023 Revision"

Ranging Mode (R-Mode) is a maritime positioning and timing system that uses radio infrastructure to transmit synchronised radio signals in frequency bands which are allocated to maritime usage.

{{IALAFooter}}

{{languages|A-N Radio range}}
[[Category:4.4 Other Radio Navigation Systems]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

True Range

2024-02-07T17:25:58Z

Minsuids: Created page with "True Range – is the maximum distance, measured from the place of emission to positions, at which the information carried by the signal can be understood, in existing transmission of light, sound and motion conditions. Category:IALA Dictionary 2023 Revision"

True Range – is the maximum distance, measured from the place of emission to positions, at which the information carried by the signal can be understood, in existing transmission of light, sound and motion conditions.

[[Category:IALA Dictionary 2023 Revision]]

Secondary Light

2024-02-07T17:25:31Z

Minsuids: Created page with "Secondary Light – is a light placed on or near to a main light’s support and having a special navigational function, for example a passing light on a leading light structure or a single sector light. Category:IALA Dictionary 2023 Revision"

Secondary Light – is a light placed on or near to a main light’s support and having a special navigational function, for example a passing light on a leading light structure or a single sector light.

[[Category:IALA Dictionary 2023 Revision]]

Phase of a light

2024-02-07T17:25:03Z

Minsuids: Created page with "Phase of a light – is each successive element of a rhythmic light’s cycle (e.g. flash, eclipse). Category:IALA Dictionary 2023 Revision"

Phase of a light – is each successive element of a rhythmic light’s cycle (e.g. flash, eclipse).

[[Category:IALA Dictionary 2023 Revision]]

Period of a light

2024-02-07T17:24:39Z

Minsuids: Created page with "Period of a light – is the time interval between the beginnings of two successive cycles of a rhythmic light. Category:IALA Dictionary 2023 Revision"

Period of a light – is the time interval between the beginnings of two successive cycles of a rhythmic light.

[[Category:IALA Dictionary 2023 Revision]]

Oscillating Light

2024-02-07T17:24:13Z

Minsuids:

Oscillating Light – is a light having alternating colours at sector limit, with increasing portion of coloured light proportional relating to the white sector.

[[Image:Oscillating_light1.jpg|400px|border]]
Example 1

[[Image:Oscillating_light2.jpg|400px|border]]
Example 2

[[Category:IALA Dictionary 2023 Revision]]

Oscillating Light

2024-02-07T17:24:00Z

Minsuids: Created page with "Oscillating Light – is a light having alternating colours at sector limit, with increasing portion of coloured light proportional relating to the white sector. border Example 1 border Example 2"

File:Oscillating light2.jpg

2024-02-07T17:22:31Z

Minsuids:

File:Oscillating light1.jpg

2024-02-07T17:21:43Z

Minsuids:

Obstruction Lights

2024-02-07T17:19:54Z

Minsuids: Created page with "Obstruction Lights – are lights marking obstructions to aircraft; they are usually red. Category:IALA Dictionary 2023 Revision"

Obstruction Lights – are lights marking obstructions to aircraft; they are usually red.

[[Category:IALA Dictionary 2023 Revision]]

Nautophone

2024-02-07T17:19:31Z

Minsuids: Created page with "Nautophone – is a horn in which the membrane is activated electrically. Category:IALA Dictionary 2023 Revision"

Nautophone – is a horn in which the membrane is activated electrically.

[[Category:IALA Dictionary 2023 Revision]]

Morse Code Fog Signal

2024-02-07T17:19:07Z

Minsuids: Created page with "Morse Code Fog Signal – is a fog signal emitting one or more characters of the Morse Code. Category:IALA Dictionary 2023 Revision"

Morse Code Fog Signal – is a fog signal emitting one or more characters of the Morse Code.

[[Category:IALA Dictionary 2023 Revision]]

Membrane horn

2024-02-07T17:18:34Z

Minsuids: Created page with "Membrane horn – is an audible signal producing its sound by means of a membrane vibrated by compressed air, steam or electricity. Category:IALA Dictionary 2023 Revision"

Membrane horn – is an audible signal producing its sound by means of a membrane vibrated by compressed air, steam or electricity.

[[Category:IALA Dictionary 2023 Revision]]

Mean Daily Low Temperature (MDLT)

2024-02-07T17:18:09Z

Minsuids: Created page with "Mean Daily Low Temperature (MDLT) – is the mean value of the daily low temperature for each day of the year over a minimum 10-year period. Category:IALA Dictionary 2023 Revision"

Mean Daily Low Temperature (MDLT) – is the mean value of the daily low temperature for each day of the year over a minimum 10-year period.

[[Category:IALA Dictionary 2023 Revision]]

Seafarer

2024-02-07T17:17:43Z

Minsuids: Created page with "Seafarer - means any person who is employed or engaged or works in any capacity on board a ship. Category:IALA Dictionary 2023 Revision"

Seafarer - means any person who is employed or engaged or works in any capacity on board a ship.

[[Category:IALA Dictionary 2023 Revision]]

Mariner

2024-02-07T17:17:19Z

Minsuids: Created page with "Mariner – is any person who is employed, or engaged, or works in any capacity on board a vessel. Category:IALA Dictionary 2023 Revision"

Mariner – is any person who is employed, or engaged, or works in any capacity on board a vessel.

[[Category:IALA Dictionary 2023 Revision]]

Height of a Light

2024-02-07T17:16:50Z

Minsuids: Created page with "Height of a Light – is the vertical distance between ground level and the top of the light structure, but excluding aerials, antennas etc. Category:IALA Dictionary 2023 Revision"

Height of a Light – is the vertical distance between ground level and the top of the light structure, but excluding aerials, antennas etc.

[[Category:IALA Dictionary 2023 Revision]]

Hazard warning signal

2024-02-07T17:16:26Z

Minsuids: Created page with "Hazard warning signal – is an audible signal intended to warn ships in low visibility conditions. Category:IALA Dictionary 2023 Revision"

Hazard warning signal – is an audible signal intended to warn ships in low visibility conditions.

[[Category:IALA Dictionary 2023 Revision]]

Fog Light

2024-02-07T17:15:58Z

Minsuids: Created page with "Fog Light – is a light which is operational under low visibility conditions. Category:IALA Dictionary 2023 Revision"

Fog Light – is a light which is operational under low visibility conditions.

[[Category:IALA Dictionary 2023 Revision]]

Fog Detector Light

2024-02-07T17:15:33Z

Minsuids: Created page with "Fog Detector Light – is a light able to detect fog automatically. There are various types; some are visible only over a narrow arc; some exhibit a blueish-white flash lasting approximately one second; others sweep back and forth. Category:IALA Dictionary 2023 Revision"

Fog Detector Light – is a light able to detect fog automatically. There are various types; some are visible only over a narrow arc; some exhibit a blueish-white flash lasting approximately one second; others sweep back and forth.

[[Category:IALA Dictionary 2023 Revision]]

Elevation of Light

2024-02-07T17:15:06Z

Minsuids: Created page with "Elevation of Light – is the vertical distance from the focal point of the light and mean sea level (when the tide is not appreciable on the near shore) or (elsewhere) MHW (Mean High Water) or other appropriate high water reference level. Category:IALA Dictionary 2023 Revision"

Elevation of Light – is the vertical distance from the focal point of the light and mean sea level (when the tide is not appreciable on the near shore) or (elsewhere) MHW (Mean High Water) or other appropriate high water reference level.

[[Category:IALA Dictionary 2023 Revision]]

Daytime Light

2024-02-07T17:14:41Z

Minsuids: Created page with "Daytime Light – is a light operating 24 hours a day without change of character. The intensity may be increased by day. Category:IALA Dictionary 2023 Revision"

Daytime Light – is a light operating 24 hours a day without change of character. The intensity may be increased by day.

[[Category:IALA Dictionary 2023 Revision]]

Character of a light

2024-02-07T17:14:16Z

Minsuids: Created page with "Character of a light – is the distinctive combination of various aspects of a light (i.e. when lit, extinguished, coloured or white) which appear regularly or rhythmically allowing it to be identified (for example, fixed, flashing, group flashing, alternating). Lights with the same character exist, but should be separated in distance, so that they are outside each nominal light range, and not adjacent, to avoid confusion. Category:IALA Dictionary 2023 Revision"

Character of a light – is the distinctive combination of various aspects of a light (i.e. when lit, extinguished, coloured or white) which appear regularly or rhythmically allowing it to be identified (for example, fixed, flashing, group flashing, alternating).
Lights with the same character exist, but should be separated in distance, so that they are outside each nominal light range, and not adjacent, to avoid confusion.

[[Category:IALA Dictionary 2023 Revision]]

Bearing (angle)

2024-02-07T17:13:49Z

Minsuids: Created page with "Bearing (angle) – is the limits of light sectors and areas of visibility of lights, and alignments of leading lights and directional lights, are given as bearings from seaward. The bearings of sectors are given in clockwise order. Category:IALA Dictionary 2023 Revision"

Bearing (angle) – is the limits of light sectors and areas of visibility of lights, and alignments of leading lights and directional lights, are given as bearings from seaward. The bearings of sectors are given in clockwise order.

[[Category:IALA Dictionary 2023 Revision]]

Aeronautical Light

2024-02-07T17:13:20Z

Minsuids: Created page with "Aeronautical Light – is often a light of great intensity and elevation, principally for aircraft navigation. Because of their intensity, these may be the first lights to be seen when approaching land. Category:IALA Dictionary 2023 Revision"

Aeronautical Light – is often a light of great intensity and elevation, principally for aircraft navigation. Because of their intensity, these may be the first lights to be seen when approaching land.

[[Category:IALA Dictionary 2023 Revision]]

Aeromarine Light

2024-02-07T17:12:19Z

Minsuids: Created page with "a marine light in which the beam has been deflected at an angle of 10° - 15° above the horizon, so that the light is usable for aircraft navigation. Category:IALA Dictionary 2023 Revision"

a marine light in which the beam has been deflected at an angle of 10° - 15° above the horizon, so that the light is usable for aircraft navigation.

[[Category:IALA Dictionary 2023 Revision]]

Whistle

2024-02-07T17:11:34Z

Minsuids:

'''3-2-235

fog signal equipment producing a sharp sound by releasing compressed air or steam across an opening.

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{{languages|Whistle}}
[[Category:3.2 Fog signal apparatus]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]

Unmanned Light

2024-02-07T17:10:57Z

Minsuids: Created page with "Unmanned Light - a light which is operated automatically and may be maintained in service remotely for extended periods of time, but with routine visits for maintenance purposes. {{IALAFooter}}"

Unmanned Light - a light which is operated automatically and may be maintained in service remotely for extended periods of time, but with routine visits for maintenance purposes.

{{IALAFooter}}

Sound signal

2024-02-07T17:08:41Z

Minsuids:

'''3-1-025

a devise which transmits sound, intended to provide information to mariners during periods of restricted visibility.

Note: The term "Sound signal" is frequently used to describe the apparatus generating the sound. This use is deprecated.

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{{languages|Sound signal}}
[[Category:3.1 Acoustics and hearing]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]

Siren

2024-02-07T17:08:18Z

Minsuids:

'''3-2-070

a deep sounding warning in which the sound is produced by the passage of air across slits or holes in a rotating disc, in which the membrane is activated electrically

{{IALAFooter}}

{{languages|Siren}}
[[Category:3.2 Fog signal apparatus]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]

Rhythmic Light

2024-02-07T17:08:02Z

Minsuids:

'''2-5-110

Rhythmic light is a light exhibiting its character in recurring regular cycles (flashes, group flashes, alternating).

Reference: C.I.E. (modified)

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{{languages|Rhythmic Light}}
[[Category:2.5 Types and Characteristics of Lights]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

Marine Aid to Navigation

2024-02-07T17:07:26Z

Minsuids:

means a device, system or service, external to a vessel, designed and operated to enhance safe and efficient navigation of individual vessels and vessel traffic. For the purpose of the Organization (IALA) this definition includes Vessel Traffic Services

Other forms: Aids to Navigation (plural), AtoN

''This definition of the term Aid to Navigation is in accordance with the IALA Constitution.<br>The use of the definition from the original IALA Dictionary has been discontinued.''

{{languages|Marine Aid to Navigation}}
[[Category:1.1 Basic Terms]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 2016 Revision]]
[[Category:Approved by DWG]]
[[Category:IALA Dictionary 2023 Revision]]

Luminous Intensity

2024-02-07T17:05:55Z

Minsuids:

'''2-1-035

Luminous Intensity (of a source, in a given direction) - The quotient of the luminous flux (dF) leaving the source, propagated in an element of solid angle containing the given direction, by the element of solid angle (dO). Luminous intensity is expressed in candelas.

[[Image:Ch2_Fig1.jpg|400px|border]]

Symbol: I

Unit: candela(cd)

Reference: C.I.E. (modified)

Note 1: If within a cone of finite solid angle O the luminous flux may be considered uniformly distributed, then the luminous intensity is given by

(Equation)

where F is the total luminous flux emitted within the solid angle.

Note 2: The term Candlepower designates a luminous intensity expressed in candelas.

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{{languages|Luminous Intensity}}
[[Category:2.1 Optics and Vision]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

Leading Lights (G.B.)

2024-02-07T17:05:21Z

Minsuids:

'''2-5-245

Alternative term: Range Lights (U.S.A.)

Two or more lights positioned to form a leading / range / transit line to be followed.

A leading line defined by two such leading lights is called the axis of the lights. (Fig.47)

Note: In Britain, the axis of the lights is often called the Line of Lights. In German it is called Richtfeuerlinie.

[[Image:Ch2_Fig47.jpg|400px|border]]

{{IALAFooter}}

{{languages|Leading Lights (G.B.)}}
[[Category:2.5 Types and Characteristics of Lights]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

Fog signal

2024-02-07T17:04:12Z

Minsuids:

'''3-1 -030

Sound signal to warn ships in conditions of poor visibility.

Also called Audible Signal or Sound Signal.

Source: IALA Guideline G1090 on The Use of Audible Signals Edition 1 December 2012.

{{languages|Fog signal}}
[[Category:3.1 Acoustics and hearing]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 2017 Revision]]
[[Category:Approved by Council through approval of source document]]
[[Category:IALA Dictionary 2023 Revision]]

Direction Light

2024-02-07T17:02:52Z

Minsuids:

'''2-5-235

a light illuminating a very narrow sector, used to mark a direction to be followed. This sector may be flanked by sectors of greatly reduced intensity or by sectors of different colour or character.

[[Image:Direction_light_2.png|400px|border]]

{{IALAFooter}}

{{languages|Direction Light}}
[[Category:2.5 Types and Characteristics of Lights]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

File:Direction light 2.png

2024-02-07T17:00:02Z

Minsuids:

Direction Light

2024-02-07T16:59:29Z

Minsuids:

'''2-5-235

a light illuminating a very narrow sector, used to mark a direction to be followed. This sector may be flanked by sectors of greatly reduced intensity or by sectors of different colour or character.

{{IALAFooter}}

{{languages|Direction Light}}
[[Category:2.5 Types and Characteristics of Lights]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

Direction Light

2024-02-07T16:58:21Z

Minsuids:

Direction Light

2024-02-07T16:54:06Z

Minsuids:

'''2-5-235

a light illuminating a very narrow sector, used to mark a direction to be followed. This sector may be flanked by sectors of greatly reduced intensity or by sectors of different colour or character.

[[Image:Direction_light_2023.png|400px|border]]
Note: See also 2-5-240.

{{IALAFooter}}

{{languages|Direction Light}}
[[Category:2.5 Types and Characteristics of Lights]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

Direction Light

2024-02-07T16:52:33Z

Minsuids:

'''2-5-235

a light illuminating a very narrow sector, used to mark a direction to be followed. This sector may be flanked by sectors of greatly reduced intensity or by sectors of different colour or character.

[[Image:Ch2_Fig46a.jpg|400px|border]]
[[File:Direction light.png|thumb]]
Note: See also 2-5-240.

{{IALAFooter}}

{{languages|Direction Light}}
[[Category:2.5 Types and Characteristics of Lights]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

File:Direction light.png

2024-02-07T16:52:28Z

Minsuids:

direction light 2023

Direction Light

2024-02-07T16:50:34Z

Minsuids:

'''2-5-235

a light illuminating a very narrow sector, used to mark a direction to be followed. This sector may be flanked by sectors of greatly reduced intensity or by sectors of different colour or character.

[[Image:Ch2_Fig46a.jpg|400px|border]]

Note: See also 2-5-240.

{{IALAFooter}}

{{languages|Direction Light}}
[[Category:2.5 Types and Characteristics of Lights]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

Diaphone

2024-02-07T16:50:05Z

Minsuids:

'''3-2-115

equipment producing a characteristic sound using a reciprocating piston with vents operated by compressed air. Output can be in the form of two tones at different sound levels, the second tone being at a lower frequency. If there is only one tone, it ends in a suddenly lowered pitch known as a “grunt”.

{{IALAFooter}}

{{languages|Diaphone}}
[[Category:3.2 Fog signal apparatus]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]

Bell

2024-02-07T16:49:44Z

Minsuids:

'''3-2-265

a sound signal producing bell tones by means of a hammer actuated by electricity on fixed AtoN and by sea motion on buoys

{{IALAFooter}}

{{languages|Bell}}
[[Category:3.2 Fog signal apparatus]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]

Angle of Uncertainty

2024-02-07T16:20:35Z

Minsuids:

'''2-5-230

the angle of uncertainty is the region where the colour and/or the flash rhythm change and where the resulting colour of the light is mixed/affected by two colours, or showing fading intensity due to a blanking screen.

[[Image:Ch2_Fig45.jpg|400px|border]]

{{IALAFooter}}

{{languages|Angle of Uncertainty}}
[[Category:2.5 Types and Characteristics of Lights]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 2023 Revision]]

Angle of Uncertainty

2024-02-07T16:11:47Z

Minsuids:

Situational Awareness

2024-02-07T16:08:10Z

Minsuids: Created page with "Situational awareness refers to the ability to identify, process, and comprehend the critical elements of information about what is happening in the surrounding environment at any given time. It involves being aware of what is happening around you and understanding how that information, events, and your own actions will impact your goals and objectives, both immediately and in the near future. Source: VTS54 Task 1.1.3(a) - Develop guidance on the Implications of Mariti..."

Situational awareness refers to the ability to identify, process, and comprehend the critical elements of information about what is happening in the surrounding environment at any given time.
It involves being aware of what is happening around you and understanding how that information, events, and your own actions will impact your goals and objectives, both immediately and in the near future.

Source: VTS54 Task 1.1.3(a) - Develop guidance on the Implications of Maritime Autonomous Surface Ships (MASS) from a VTS Perspective

{{languages|Accreditation}}
[[Category:IALA Dictionary 2023 Revision]]