ATONS NK Flashcards
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Special Marks are not intended to assist navigation.
T
A diamond shaped dayboard may be lettered.
T
Isolated Danger marks always have the double ball topmark and can be lettered.
T
An occulting light shows more off time in a period than a flashing light would.
F
A dayboard with the letter āJā marks a channel bifurcation.
T
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.
T
All marks that have lateral significance are numbered.
F
Green lights are shown on drawbridges to show when they are open.
T
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.
T
Isolated Danger Marks are green and red banded.
F
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.
T
A diamond shape having a cross centered within indicates that vessels are excluded from the area.
T
A yellow vertical band indicates that the marker is part of the ICW.
F
White lights have lateral significance on Western Rivers.
T
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.
F
A red lateral mark can have a light rhythm of quick flashing.
T
Letters are added to numbers as suffixes.
T
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.
T
Flashing lights have frequencies that do not exceed 60 flashes per minute.
F