Psp Test #1 Flashcards
Unlighted, red and green, horizontally-banded buoys with the topmost band red
.
are conical in shape and called nun buoys
The period at high or low tide during which there is no change in the height of the water is called the .
Stand of the tide
When you are steering on a pair of range lights and find the upper light is above the lower light you should .
Continue on the present course
When displayed under a single-span fixed bridge, red lights indicate .
The channel boundaries
A buoy having red and green horizontal bands would have a light characteristic of
Composite group flashing
The direction of the surface wind is .
from high pressure toward low pressure deflected by the earth’s rotation
“Stand” of the tide is that time when .
the vertical rise or fall of the tide has stopped
A vessel’s position should be plotted using bearings of .
Fixed known objects on shore
Which buoy is NOT numbered?
Green can buoy
Preferred-channel buoy
Red lighted buoy
Green gong buoy (21)
Preferred channel buoy
When using a buoy as an aid to navigation which of the following should be considered?
The buoy should be considered to always be in the charted location.
If the light is flashing, the buoy should be considered to be in the charted location.
The buoy may not be in the charted position.
The buoy should be considered to be in the charted position if it has been freshly painted.
(28)
The buoy may not be in the charted position
You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by .
A. a quick flashing red or green aid to navigation
B. a steady blue light in the center of the span
C. 3 white lights in a vertical line in the center of the span
D. a flashing green light in the center of the span (29)
3 white lights in a verticals line in the center of the span
When approaching a preferred-channel buoy, the best channel is NOT indicated by the .
A. light characteristic
B. color of the uppermost band
C. shape of an unlighted buoy
D. color of the light (31)
Light characteristics
The datum used for soundings on charts of the Atlantic Coast of the United States is mean .
Lower low water
The Local Notice to Mariners is usually published .
A. daily
B. weekly
C. monthly
D. semiannually (34)
Weekly
What does the term “tide” refer to?
Vertical movement of water
Mean high water is the reference plane used for .
heights above water of land features such as lights
A buoy with a composite group-flashing light indicates a(n) .
Bifurcation (division into two parts)
The range of tide is the
The difference between heights of high and low tide
When should a navigator rely on the position of floating aids to navigation?
A. During calm weather only
B. During daylight only
C. Only when inside a harbor
D. Only when fixed aids are not available
Only when fixed aids are not available
In the U.S. Aids to Navigation System, red and green horizontally-banded buoys mark .
A. channels for shallow draft vessels
B. general anchorage areas
C. fishing grounds
D. junctions or bifurcations
Junctions and bifurcations
The reference datum used in determining the heights of land features on most charts is .
A. mean sea level
B. mean high water
C. mean low water
D. half-tide level (52)
Mean high water
Red lights may appear on .
A. horizontally banded buoys
B. vertically striped buoys
C. yellow buoys
D. spherical buoys (61)
Horizontally banded buoys
Charted depth is the .
A. vertical distance from the chart sounding datum to the ocean bottom, plus the height of tide
B. vertical distance from the chart sounding datum to the ocean bottom
C. average height of water over a specified period of time
D. average height of all low waters at a place
Vertical distance from the chart sounding datum to the ocean bottom
Mean lower low water is the reference plane used for .
A. all vertical measurements
B. heights above water for lights, mountains, etc.
C. soundings on the U.S. east and west coasts
D. water depths on the U.S. east coast only
Soundings on the US east and west coasts
