IALA

Gabriel Bionat · 30問 · 2年前

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問題一覧

In 1979, a body called ______ was formed to unify the World's buoyage system.

International Association of Lighthouse Authorities (IALA)

The areas that use the 'B' system, are

North and South America, Japan, Korea and the Philippines.

The IALA systems are made up of five types of buoys

lateral cardinal, safe water, isolated danger, emergency wrecking bouy and special water mark buoy.

is a fixed aid to navigation that displays a light of different colours and/or rhythms over designated arcs. The colour of the light provides directional information to the mariner.

SECTORED LIGHTS

chart symbols guide

Admiralty

continuous, unblinking light

Fixed (F)

light duration shorter than darkness. Frequency not greater than 30 per minute

Flashing (FI)

light duration shorter than darkness Frequency is 60 at least 60 per minute.

Quick Flashing (Q)

light duration shorter than darkness. Frequency is at least 100 per minute.

Very Quick Flashing (VQ)

like quick flashing but having a brief, extended darkness period.

Interrupted Quick Flashing (IQ)

Light has equal duration between light and darkness. Period consists of both light and dark interval. Also called Equal Interval (E Int).

Isophase (Iso)

Combination of two patterns in one period, le. 2 flashes followed by three flashes

Group Flashing (Gp FI (x+x))

Opposite of flashing. Light is on more than it is off

Occulting(occ)

changes color. Special purpose light for situations requiring significant caution. Example shows AL. WG...alternating white and green light

Alternating (AL)-Alternating light

Example is ort flashes followed by one which is two short flash then a period of darkness. Shown as (MoU)) on charts

Morse (Mo) Morse "U" prolonged -Morse code light signal.

in a period with lighted period of at least 2 seconds.

Long Flashing (LFL)

fixed

Flashing (FI)

Quick Flashing (Q)

Very Quick Flashing (VQ)

Interrupted Quick Flashing (IQ)

Isophase (ISO)

Group Flashing (Gp Fl)

Occulting (Occ)

Alternating (Al)

Long Flashing (LFL)

Fixed

Flashing (Fl)

Long Flash

Quick Flashing

Very Quick Flashing

Isophase (ISO)

Occulting (Occ)

Lanbys

Lightship

Leading lights

sectored lights

General Direction

Taken by the mariner conventional direction of buoyage means the approaching a harbour, river, estuary or other waterway from seaward. in the case of Inland Waters, the conventional direction of buoyage is going upstream.

General direction

All marks within the IALA system are distinguished by:

➤ Shape ➤ Colour ➤ Topmark > Light

defines the borders of channels and indicates the direction

Lateral Buoys and Marks

IALA "A", red buoys mark the_____ side of the channel

port

Under IALA "B", red buoys mark the ______side of the channel

starboard

under IALA "B", green buoys mark the _____ side of the channel when sailing towards land.

port

Red buoys have ___ numbers

even

Green buoys have ______ numbers

odd

The most significant difference is the

direction of voyage

What region

Region A

LATERAL MARKS REGION A PORT HAND MARKS

Colour - buoy shape - top mark - light color -

Lateral marks Region A Strbd hand marks

Colour - buoy shape - top mark - light color -

Lateral Marks Region A Preferred channel to stbrd

red, green, red horizontal stripes

Lateral Marks Region A Preferred channel to port

green, red, green horizontal stripes

These markers are placed at the split of the channels to indicate that the channels are split and identifies which is the channel to use.

PREFERRED CHANNEL MARKERS / BIFURCATION BUOY

note

indicate the safe side of a danger with an approximate bearing

The four cardinal buoys

When a new obstacle which is not yet shown on charts needs to be marked, two cardinal buoys - for instance a South buoy and an East buoy - will be used to indicate this "uncharted" danger. The cardinal system is identical in both the IALA A and IALA B buoyage systems.

note

12 Q / VQ The number of flashes can be related to the clock face

note

This safe water buoy is vertically striped. ➤ Body: ➤ Topmark: ➤Lights:

red and white vertical stripes single red sphere calm and white Iso, Occ or LFI 10s., Morse "A",

tells us that there is safe (deep) water all round the buoy. A ship can pass any side of it

safe water buoy

This safe water buoy is vertically striped. ➤ Body: ➤ Topmark: ➤Lights:

red and white vertical stripes single red sphere calm and white Iso, Occ or LFI 10s., Morse "A",

Isolated dangers buoy Body: Topmark Light:

black with red horizontal bands : 2 black spheres. consists of a white flash FI(2).

indicate a direction away from the danger. indicates there is a danger in the immediate vicinity of the buoy, like a wreck. Ships should keep well clear of it

Isolated danger buoy

Isolated dangers

This buoy is placed as close as possible to a new dangerous wreck.

Emergency Wreck Marking Buoy

The emergency wreck marking buoy will remain in position until:

the wreck is well known and has been promulgated in nautical publications. the wreck has been fully surveyed and exact details such as position and least depth above the wreck are known. a permanent form of marking of the wreck has been carried out

Emergency wreck marking buoy characteristic;

> pillar or spar buoy, coloured in equal number and dimensions of blue and yellow vertical stripes (minimum of 4 stripes and maximum of 8 stripes) >fitted with an alternating blue and yellow flashing light if multiple buoys are deployed then the lights will be synchronized. > a racon Morse Code "D" top mark, if fitted, is a standing/upright yellow cross

Emergency wreck marking buoy

are used to denote mariners' areas with special features. They do not play any major role in facilitating mariners in safe navigation. They only point out areas of certain interests to mariners. The nature of such areas can be found by consulting the charts or Sailing Directions.

Special marks buoy

may indicate spoil grounds, military exercise areas, recreational zones, boundaries of anchorage areas, cables and pipelines, Dead ends, mooring areas, protected areas, marine farms or aquaculture, oil wells, ODAS(Ocean Data Acquisition System)

Special marks

Special mark buoy COLOUR BODY SHAPE TOPMARK LIGHT COLOUR

YELLOW OPTIONAL BUT MUST NOT CONFLICT WITH THAT USED FOR A LATERAL OR SAFE WATERMARK SINGLE YELLOW CROSS-X SHAPED YELLOW

play a vital role in transmitting real-time, fast, and accurate meteorological and oceanographic data to maritime stations and for scientific research purposes. Meteorological stations utilise this data to provide weather forecasts and warnings crucial for navigators, the fishing industry, recreational boating, and drilling activities.

ODAS (Ocean Data Acquisition Systems)

ODAS

(Ocean Data Acquisition Systems)

odas

It transmits a return signal It can be 3&10

radio beacon

are operated by the motion of the buoy in the sea, and can be a great comfort on a foggy day.

Sound signals

Sound Systems There are three main types of wave actuated sound signals:

Whistle Bell Gong

Lack of competence

human error

Do not follow pattern

Lighthouse Lightships lanbys Sectored lights Leading lights

NOA

National Oceanic and Atmospheric Administration

Maximum distance at which a given light signal can be seen by the eye of the observer at a given time

Luminous range

The higher light means that its horizon is farther away, see distance of horizon

note

Is based on the elevation of light, the height of eye of the observer and the curvature of the earth

geographic range

The luminous range when the daytime meteorological visibilty

nominal range

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