ATONS NK Flashcards
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Special Marks are not intended to assist navigation.
T
A diamond shaped dayboard may be lettered.
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Isolated Danger marks always have the double ball topmark and can be lettered.
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An occulting light shows more off time in a period than a flashing light would.
F
A dayboard with the letter “J” marks a channel bifurcation.
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A Special Mark does not have lateral significance, but is intended to assist in navigation.
F
The range of lights as listed in the Light List is the nominal range.
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All marks that have lateral significance are numbered.
F
Green lights are shown on drawbridges to show when they are open.
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All aids to navigation will be equipped with reflectve material to aid in identification.
F
A Morse Code light has appearances of light that are not of equal duration.
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Isolated Danger Marks are green and red banded.
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Sidemarks are only used to show the channel limits.
F
The purpose of aids to navigation exhibiting white or yellow lights may be determined by shapes.
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A diamond shape having a cross centered within indicates that vessels are excluded from the area.
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A yellow vertical band indicates that the marker is part of the ICW.
F
White lights have lateral significance on Western Rivers.
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When not conducting drilling operations, oil well structures are usually marked with one or more fixed or quick flashing white or red lights, visible for two nautical miles.
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A red lateral mark can have a light rhythm of quick flashing.
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Letters are added to numbers as suffixes.
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Markers in IALA Region A exhibit opposite shape significance.
F
Beacons may be floating aids to navigation.
F
An occulting light is a light in which the total duration of light in a period is longer than the duration of darkness.
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Flashing lights have frequencies that do not exceed 60 flashes per minute.
F
Actual watch circles do not coincide with the symbol representing them on charts.
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A red or green lateral mark shall be numbered or lettered.
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Light sectors are given in bearings that are degrees true from the light to the observer.
F
Green aids to navigation have even numbers.
F
A single occulting light is an occulting light in which the light flash is regularly repeated.
F
A military excersise area would be marked by a regulatory mark.
F
Markers in IALA Region A exhibit opposite color significance.
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If the first letter on a dayboard is “B”, this signifies that the dayboard is marking a junction or bifurcation.
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A red or green lateral mark shall be numbered and can sometimes be augmented by letters.
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Safe water marks can be lettered with the letters augmented by numbers.
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An open faced diamond shape signifies danger.
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Information concerning the location and characteristics of oil well structures which display lights and sound signals located in obstruction areas are listed in the NTM.
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A special purpose mark shall be a can or a cone.
F
Green aids to navigation have odd numbers.
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Information and Regulatory marks have orange geometric shapes against a white background.
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A light that has only short flashes could be considered a Morse Code Light.
F
If the second letter on a dayboard is “G”, it indicates that the key color of the dayboard is green.
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Ranges always have white lights.
F
Isolated Danger Marks would be black and red banded.
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Numbers for red and green buoyage systems increase when proceeding from sea and going to port.
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An occulting light is a light in which the total duration of light in a period is longer than the duration of darkness and the intervals of darkness are usually of equal duration.
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A dayboard that has the letter “M” has lateral significance.
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Isolated Danger marks always have the double ball topmark and are always lettered.
F
Ranges with colored lights have lateral significance.
F
Bearings on rangelines are given in degrees and minutes.
F
Information and regulatory marks, when lighted, display a yellow light with any rhythm except Mo A, quick flashing and flashing (2).
F
A safe water mark may be numbered or lettered.
F
Preferred channel marks often mark wrecks or obstructions.
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A dayboard with the letter “J” does not have lateral significance.
F
A Special Mark has no navigational significance, but is intended to alert the marniner of a special feature in the area.
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A solid red or green buoy must have a light.
F
Aids to navigation with lateral significance exhibit flashing, quick, occulting or isophase light rhythms.
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The yellow markers for the ICW may appear on lateral marks with the opposite lateral significance.
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A dayboard marked “JG-I” is a square dayboard, red and green striped with the top stripe green. It also has a yellow reflective strip.
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A regulatory mark could have a light rhythm of quick flashing.
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A daymark conveys, during daylight hours, the same significance as does the aid to navigation’s light at night.
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A Special Mark is intended to alert the marniner of a special feature in the area.
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A dayboard is marked “TR-TY.” This dayboard is a triangular red dayboard with a yellow triangle.
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A yellow square indicates that the marker should be left to port when in the ICW.
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A solid red or green buoy could mark a wreck or obstruction.
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All LNB’s are equipped with RACONS.
F
While transiting the ICW, you sight a red buoy with a yellow square. This buoy should be left to starboard.
F
Shapes are laterally significant only when associated with a particular light rhythm.
F
A regulatory mark may have a light rhythm of flashing 4 s.
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In the standard designation system for dayboards, the second lettter refers to the key color.
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Numbers in a buoyage system increase by one at each buoy and do not skip numbers.
F
A group-occulting light is an occulting light which has a group of eclipses that are regularly repeated.
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An Isolated Danger Mark would be used to mark a dredge pipeline.
F
An isophase light is a light in which all durations of light and darkness are equal.
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A buoy that is used as a regulatory mark is white with two horzontal orange bands around the top and bottom.
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Diamond shaped day-boards that have no lateral significance are divided into four diamond shaped sectors with the side sectors being white and the top sectors being red, green or or black.
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The range of a light is listed in the light list for private aids to navigation, range lights and directional lights.
F
Buoy Positions represented on nautical charts are approximate positions.
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Isolated Danger Marks are erected on or near an isolated danger.
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A dayboard with the letter “J” may be a square or a triangle.
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Safe water marks always have a topmark.
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Isolated Danger Marks are always lighted.
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In the Light List, the abbreviation “Q” means quick.
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Light Rhythms can indicate the lateral significance.
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A mark with lateral significance can have a white light.
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It is not always possible to pass on either side of a preferred channel mark.
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A daybeacon never has a light.
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A green buoy can have a white or green light.
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Numbers for red and green buoyage systems decrease when proceeding from port and going to sea.
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A special mark may have a number.
F
Diamond shaped day-boards that have no lateral significance are divided into four square shaped sectors.
F
A dayboard that is marked on the chart “NY” is a diamond shaped dayboard, with a yellow border.
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A yellow triangle indicates that the marker should be left to port when in the ICW.
F
A dayboard that has the letter “M” is a safe water mark.
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When transiting the main channel you see a red buoy with a yellow triangle. If in the ICW, this marker should be left to port.
F
A lateral mark could have a flashing light.
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Diamond shaped day-boards that have no lateral significance are divided into four diamond shaped sectors.
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Lighted, sound, pillar and spar buoys have no shape significance.
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If the first letter on a dayboard is “S”, this signifies that the dayboard is square.
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In US waters, returning from seaward and proceeding toward the head of navigation is generally considered as moving southerly along the Pacific coast.
F
Mooring buoys are white with a blue horizontal band.
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A flashing light is a light in which the total duration of darkness is shorter than the total duration of light and the appearances of darkness are usually of equal duration.
F
Geographic range for a light is given in the light list.
F
A circular shaped dayboard indicates danger.
F
A military excersise area would be marked by a special mark.
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Oil Well structures are not listed in the light list.
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A morse code lght has light flashes that are of clearly different durations.
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The chart symbol Oc(2) refers to a group occulting light. The number 2 refers to the number of eclipses in the period.
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A preferred channel marker could be a can with no light.
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When transiting the main channel you see a green buoy with a yellow triangle. If in the ICW, this marker should be left to starboard.
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Bearings in the light list are in degrees true.
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Isolated Danger Marks have navigable water all around them.
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A special mark coud be used to mark an anchorage.
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Non-Lateral marks are used to supplement lateral aids to navigation.
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A red or green lateral mark shall be numbered or lettered.
F
Diamond shaped day-boards that have no lateral significance are divided into four diamond shaped sectors with the top sectors being white.
F
A special mark could be lettered.
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Obstructions part of the appurtenances to the main structure of an oil well structure are usually lighted.
F
The range of a light is not listed in the light list for private aids to navigation.
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LNB’s are red in color.
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An LNB is considered a floating lighthouse.
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Numbers for red and green buoyage systems increase when proceeding from port and going to sea.
F
Red aids to navigation have odd numbers.
F
The purpose of aids to navigation exhibiting white or yellow lights may be determined by shapes, colors, letters and light rhythms.
T
The center stripe of a range marker could be yellow.
F
A Special Purpose mark would be used to mark a spoil area.
T
In the standard designation system for dayboards, the first lettter refers to the key color.
F
In the standard designation system for dayboards, the third letter is only used on dayboards that are marking a range.
T
Height above the water as listed in the light list is the height above the water from the focal plane of the fixed light to MLW.
F
Isolated Danger marks always have a topmark consisting of two red balls.
F
For situations where lights require a distinct cautionary significance, as at sharp turns, sudden channel constrictions , wrecks or obstructions, a quick flashing light rhythm is used.
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A dayboard that has the letter “M” marks a fairway or the middle of the channel.
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If the second letter on a dayboard is “Y”, it indicates that the key color of the dayboard is yellow.
T
Special Marks are intended to assist navigation.
F
The range of a light is not listed in the light list for private aids to navigation, range lights and directional lights.
T
Height above the water as listed in the light list is the height above the water from the focal plane of the fixed light to MHW.
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Port side lateral marks have odd numbers.
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Red aids to navigation have even numbers.
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Bearings on rangelines are given in degrees and tenths of minutes.
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A mark with a yellow diamond with yellow retroreflective panels and exhibiting a yellow light with Morse Code (B). This is marking the centerline of a draw bridge.
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A beacon that is used as a safe water mark would have an octagonal daymark.
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A Safe Water Mark may have a white light with a rhythm of Morse Code “A.”
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A dayboard with the letter “N” signifies that the marker has no lateral significance.
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If the second letter on a dayboard is “R”, it indicates that the key color of the dayboard is red.
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A single occulting light has a light flash that is regularly repeated.
F
A preferred chanel mark always has a colored red or green light when lighted.
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Letters are used to augment numbers in buoyage systems.
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The shape of a special purpose mark is optional.
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A regulatory mark may not have a light rhythm of quick flashing.
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A dayboard with the letter “J” could be square.
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Preferred channel marks may normally be passed on either side.
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A single occulting light is an occulting light in which the eclipse is regularly repeated.
T
At a point where a channel divides when proceeding the conventional direction of buoyage a preferred channel in IALA Region B may be indicated by a modified port or starboard lateral mark.
T
In the standard designation system for dayboards, the first lettter refers to the shape or purpose of the board.
T
Lightouses most often do not have lateral significance.
T
A buoy with a green light can only mark the port side of a channel.
F
Safe Water Marks have safe water on all sides.
T
Lateral Marks are buoys or beacons indicating the port and starboard sides of a route to be followed.
T
