Aids to Navigation Flashcards
Which daymark shape is used in the lateral system?
Select one:
a.
Pentagon
b.
Semicircle
c.
Diamond
d.
Triangle
d.
Triangle
The light rhythm of Morse (A) is found on ____________________.
Select one:
a.
Preferred-channel buoys
b.
Safe water buoys
c.
Special marks
d.
Starboard or port-side buoys
b.
Safe water buoys
Red lights may appear on ________________.
Select one:
a.
Horizontally banded buoys
b.
Yellow buoys
c.
Vertically stripped buoys
d.
Spherical buoys
a.
Horizontally banded buoys
The annual change for variation for an area can be found in…
Select one:
a.
Variation does not change
b.
The compass deviation table
c.
The center of the compass rose on a chart of the area
d.
The handbook for Magnetic Compass Adjustment, Pub 226
c.
The center of the compass rose on a chart of the area
In the U.S. Aids to Navigation System, red and green horizontally banded buoys mark…
Select one:
a.
Fishing grounds
b.
Channels for shallow draft vessels
c.
Junctions or bifurcation
d.
General anchorage areas
c.
Junctions or bifurcation
What are the colors of a mid-channel daymark?
Select one:
a.
Black and red
b.
Green and white
c.
Red and white
d.
Green and yellow
c.
Red and white
Which buoy from the list below may be even numbered?
Select one:
a.
Lighted green buoy
b.
Mid-channel buoy
c.
Unlighted nun buoy
d.
Special Purpose buoy
c.
Unlighted nun buoy
What are the characteristics of an isophase light?
Select one:
a.
4 sec. Flash, 2 sec. Eclipse, 3 sec. Flash, 2 sec. eclipse
b.
6 sec. Flash, 3 sec. Eclipse
c.
2 sec. Flash, 5 sec eclipse
d.
1 sec. Flash, 1 sec. Eclipse
d.
1 sec. Flash, 1 sec. Eclipse
Buoys may be marked with reflective material to assist in their detection by search light. Which statement is true?
Select one:
a.
A special-purpose mark will display either red or green reflective material to agree with its shape
b.
A preferred-channel buoy displays either red or green reflective material to agree with the top band of color
c.
A safe-water buoy will display red and white vertical stripes of reflective material
d.
All reflective material is white because it is the most visible at night
b.
A preferred-channel buoy displays either red or green reflective material to agree with the top band of color
Which buoy may be odd numbered?
Select one:
a.
A yellow buoy
b.
Unlighted can buoy
c.
A spherical buoy
d.
A red buoy
B. Unlighted can buoy
Which buoy may be even numbered?
Select one:
a.
Mid-channel buoy
b.
Unlighted nun buoy
c.
Lighted green buoy
d.
Special Purpose buoy
b.
Unlighted nun buoy
Under the IALA-B Buoyage System, a conical buoy is _________________.
Select one:
a.
numbered with an odd number
b.
red in color
c.
identified by a letter
d.
left to port when entering from seaward
b.
red in color
You are steering on a pair of range lights and find the upper light is above the lower light you should _______________.
Select one:
a.
Wait until the lights are no longer in a vertical line
b.
Come left
c.
Continue on present course
d.
Come right
c.
Continue on present course
A nun buoy will ____________________.
Select one:
a.
be green in color
b.
have an even number
c.
be cylindrical in shape
d.
be left to port when entering from seaward
b.
have an even number
Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light listed in the light list in which of the following manners?
Select one:
a.
True bearings as observed from the ship toward the light
b.
True bearings as observed from the light towards the ship
c.
Geographic positions outlining the area of the sector
d.
An outline of the area of the sector
a.
True bearings as observed from the ship toward the light
