Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
45 Cards in this Set
- Front
- Back
|
What is he element of a particular lighted aid to navigation which causes it to be most readily distinguishable from a distance?
|
Its characteristic light cycle
|
|
|
What is symbolized by the abbreviation A1t.F.Gp.F1.?
|
Alternating fixed and group flashing.
|
|
|
What is symbolized by the abbreviation A1t.Gp.0cc?
|
Alternating group occulting
|
|
|
What is ment by a fixed navigational light?
|
It means that the light burns in a continuous steady mannerand does not change color.
|
|
|
What is the characterstics of an occulting light?
|
The duration of he dark interval is less then that of the light interval.
|
|
|
What are the characteristics of a quick flashing light?
|
It flashes at a rate of not less the 50 flashes pre min but less then 80 flashes per minute.
|
|
|
What is the designation of a light which shows a continuous steady light upon which is superimposed a flash of light which is of greater brightness at a regular 3-second interval?
|
It is called a fixed and flashing light.
|
|
|
Why is seacoast light fixed in a lighthouse or in a light structure?
|
In order to increase the visibility range.
|
|
|
What type of navigational equipment maybe placed inside a lighthouse besides the light itself?
|
Radio beacon equipment and/or fog signaling equipment.
|
|
|
How are danger bearings exhibited when viewing a lighthouse?
|
When the light from the lighthouse burns red throughout an arc of bearing, then danger sectors are being indicated.
|
|
|
How does a lighthouse differ form a light station?
|
A lighthouse may contain a living quarter for the resident personnal. At a light station the operators are housed in separate buildings.
|
|
|
How can a lighthouse be absolutely identified during the day?
|
By its color pattern.
|
|
|
What other function may a light structure fulfill, besides the function of bearing a light?
|
It can act as a channel marker.
|
|
|
What is a lightship?
|
A floating lighthouse which is positioned where conditions make it impossible to build a permanent structure
|
|
|
What international code signal is hoisted by a lightship which is underway or off its station?
|
LO
|
|
|
What characterizes a relief lightship?
|
The word "RELIEF"painted in white on both sides
|
|
|
What are the most abundant aids to navigation?
|
Buoys
|
|
|
What is a LANBY?
|
A Large Automatic Buoy
|
|
|
How large is a landby?
|
It is 40 feet in diameter
|
|
|
What is the IALA
|
The international association of lighthouse authorities
|
|
|
In what year was theIALA maritime Buoyage System agreement signed by moost of the worlds maritime nations?
|
1982
|
|
|
In buoy region A, are buoys red to port or red to starboard when entering seaward?
|
Red to port.
|
|
|
In what buoy region is North America?
|
Region B
|
|
|
What are the five basic buoy shapes?
|
Can,nun,spherical,piller and spear
|
|
|
What is a piller buoy?
|
Any buoy smaller than a lighthouse buoy which has a tall, central structure on a broad base.
|
|
|
What is a "spar"?
|
iIt is a large log which has been trimmed, shaped, and appropriately painted as a navigational aid(can also be in metal)
|
|
|
What is the difference between a nun buoy and a can buoy?
|
A nun buoy is conical in shape and a can buoy is clyindrical in shape.
|
|
|
What is the energy source for most sound-signaling buoys?
|
The movement of the sea
|
|
|
How does a gong buoy differ from a bell buoy?
|
it supports 4 gongs, with each gong sounding a different note.
|
|
|
What is ment by the term "combination buoy"?
|
That means that the buoy combines both sound and light signal's
|
|
|
What is the meaning of a solid black buoy when a ship is approaching a harbor from seaward?
|
It indicates the left side of the cgannel (in region B)
|
|
|
What color scheme is used on buoys which are used to mark obstructions and channel junctions?
|
Black and Red Horizontal banding.
|
|
|
Which color of buoy has no navigational significance?
|
An all white Buoy
|
|
|
What do black and white vertically striped buoys indicate?
|
They designate the middle of a channel or fairway.
|
|
|
How are quarantine anchorages indicated?
|
By yellow buoys
|
|
|
What is the usually signified by a white buoy with a green top?
|
A dredging area
|
|
|
How are black channel buoys numbered, when approaching from seaward?
|
They are numbered with odd numbers, starting with with the first buoy from seaward.
|
|
|
On which color of buoys can green lights be used?
|
They can be used on black or black and red horizontally banded buoys with the uppermost band black
|
|
|
What buoy is allowed to bear a white light?
|
They are allowed on any color of buoy
|
|
|
What is the characteristic exhibited by a midchannel buoy light?
|
The morse code A signal
|
|
|
When may buoys be used for taking a navigational fix?
|
Never, because their position is not sufficiently dependable.
|
|
|
What is ment by a "daybeacon range"?
|
It consists of 2 daybeacons which are located on the same specific true bearing at some distance from one another so that when a ship sees them precisely in line , the ship is then on the range of the true bearing
|
|
|
What shapes are the daymarks which are equivalent to spherical buoys?
|
Octagonal
|
|
|
What is the distinguishing color which appers on all buoys, daybeacons and light structures along the intercoastal waterway?
|
Yellow
|
|
|
What part of a channel is indicated by a daybeacon showing an octagon having black and white stripes?
|
Midchannel
|
