Q171 Practice Quiz

1. Wind speed
2. Temperature
3. Rain in inches
4. Barometric pressure  ← correct

1. 20 to 30 knots  ← correct
2. 40 to 50 knots
3. 5 to 10 knots
4. Over 60 knots

1. Gale force winds from the north
2. An unusually long ocean swell  ← correct
3. Steep, short-period waves and light wind
4. Thunderstorms and higher than usual humidity

1. Cyclonic spirals
2. Spiral rainbands
3. Wall clouds  ← correct
4. Funnel clouds

1. The amount of cloud cover forecasted
2. The wind speed forecasted  ← correct
3. The wave heights forecasted
4. The amount of rain forecasted

1. The weather station
2. The broadcasting station
3. Sea level  ← correct
4. Washington, D.C.

1. Inches of mercury and centimeters
2. Feet of mercury and millibars
3. Inches of mercury and millibars  ← correct
4. Inches of mercury and millimeters

1. It signifies middle or high-altitude clouds
2. It means rainy clouds  ← correct
3. It means sheet or layer clouds
4. It means great vertical development

1. Rain expected
2. Hurricane weather
3. Fog setting in
4. Fair weather  ← correct

1. Cumulonimbus  ← correct
2. Stratus
3. Cirrus
4. Altostratus

1. Clearing weather, possibly accompanied by high winds  ← correct
2. Deteriorating weather with rain or snow
3. Heavy rain or severe thundershowers
4. Clear weather with no wind, but the possibility of rain or snow within 24 hours

1. They are not deflected by the earth's rotation
2. They move from areas of high pressure to areas of low pressure  ← correct
3. Air masses are not affected by the earth's gravity
4. In North America the air masses move from east to west

1. The reading rises  ← correct
2. The reading falls
3. The reading falls rapidly
4. The reading stays the same

1. Northeast
2. West-Southwest
3. South-Southeast  ← correct
4. Northwest

1. The wind will shift in a clockwise manner  ← correct
2. The wind will continue blowing from the same direction
3. The wind will shift in a counterclockwise manner
4. The wind will increase in velocity

1. Cirrus
2. Cumulonimbus  ← correct
3. Stratus
4. Altostratus

1. A rapid drop in barometric pressure followed by darkness
2. Dense fog and high humidity
3. Gusty winds, thunder, rain or hail, and lightning  ← correct
4. Clear skies with the approach of a cold front

1. Hurricane weather
2. Rain expected
3. Fog setting in
4. Fair weather  ← correct

1. temperature increases
2. wind direction changes
3. wind speed increases
4. All of the above  ← correct

1. Strong winds  ← correct
2. Light winds
3. Precipitation
4. Calms

1. It is of little benefit since the weather changes frequently and rapidly.
2. It gives the mariner time to prepare for weather changes.  ← correct
3. It allows the mariner to make long-term weather forecasts.
4. It provides a legal reason to cancel a projected voyage.

1. air being warmed above the dew point
2. warm moist air being blown over a colder surface  ← correct
3. a rapid cooling of the air near the surface of the Earth at night
4. saturation of cold air by rain

1. temperature increases
2. wind speed increases
3. wind direction changes
4. All of the above  ← correct

1. It serves no significant purpose
2. It is used to identify the characteristics of the light
3. It indicates the limits of the navigable channel
4. It indicates a danger area  ← correct

1. 1.0 second duration
2. 1.5 seconds duration
3. 2.0 seconds duration  ← correct
4. 3.0 seconds duration

1. General information  ← correct
2. Danger
3. An exclusion area
4. A controlled area

1. A flashing red light showing a group of three flashes
2. A quick-flashing green light
3. A flashing white light showing a group of two flashes  ← correct
4. A quick-flashing red light

1. They are marked in 6-inch figures with retro-reflective material
2. The numbers increase with the even numbers to starboard  ← correct
3. The numbers are the same as their Light List number
4. The numbers decrease with the odd numbers to starboard

1. Spoil grounds
2. The preferred channel  ← correct
3. Fishing areas
4. An isolated danger

1. They may show a quick-flashing, Q(9)15s, white light
2. They must show a composite group-flashing, Fl(2 + 1), green light
3. They may show a composite group-flashing, Fl(2 + 1), red light
4. They may show a white Morse (A) light  ← correct

1. Yellow and black vertically striped buoy
2. White and international orange buoy
3. Yellow buoy  ← correct
4. White buoy with a green top

1. The glare from background lighting
2. The elevation of the light
3. The existing visibility conditions  ← correct
4. The observer's height of eye

1. 9.0 miles  ← correct
2. 10.0 miles
3. 11.0 miles
4. 12.0 miles

1. Green and red horizontally banded
2. Red and white vertically striped
3. White with orange geometric shapes  ← correct
4. Solid yellow

This question is asked against Coast Guard illustration D027NG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.

1. Pass to the east of the buoy
2. Pass to the south of the buoy
3. Pass to the north of the buoy
4. Keep well clear of the buoy and pass on either side  ← correct

1. Army Corps of Engineers
2. National Ocean Service
3. United States Coast Guard  ← correct
4. Oceanographic Office

1. Black
2. Green  ← correct
3. Yellow
4. Red

1. yellow lights
2. flashing red lights
3. white lights  ← correct
4. flashing green lights

1. It shall be lighted with a white light
2. It shall be yellow in color  ← correct
3. It shall be lighted with a red light
4. It shall be striped black and red

This question is asked against Coast Guard illustration D045NG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.

1. C and D
2. B and C
3. A and D  ← correct
4. A and B

1. This buoy that is off-station and is marked to warn mariners of its wrong position
2. It is a buoy that was set in error and will be replaced with a red nun buoy
3. This is an information or regulatory buoy that has lateral significance
4. It is a dual-purpose marker used where the ICW and other waterways coincide  ← correct

1. 3°E  ← correct
2. 9°E
3. 3°W
4. 9°W

1. 1.0 second duration
2. 1.5 seconds duration
3. 2.0 seconds duration  ← correct
4. 3.0 seconds duration

1. 5°E
2. 5°W
3. 6°E
4. 6°W  ← correct

1. The glare from background lighting
2. The elevation of the light
3. The observer's height of eye
4. The existing visibility conditions  ← correct

1. 18.4nm
2. 19.9nm  ← correct
3. 20.8nm
4. 21.5nm

1. The maximum distance the light may be seen restricted by the height of the light and the curvature of the earth
2. The maximum distance at which a light may be seen in clear weather with 10 miles visibility  ← correct
3. The minimum distance at which the light may be seen based on a 12 mile distance to visible horizon
4. The minimum distance at which the light may be seen with infinite visibility

1. U.S. Coast Pilot
2. Light List  ← correct
3. Nautical Charts
4. Tide Tables

1. 2°E
2. 2°W
3. 7°E  ← correct
4. 7°W

1. 5°E
2. 5°W
3. 6°E
4. 6°W  ← correct

This question is asked against Coast Guard illustration D034NG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.

1. A  ← correct
2. B
3. C
4. D

1. under perfect visibility
2. with ten miles visibility  ← correct
3. with fifteen miles visibility
4. under existing visibility conditions

1. 1 sec. flash, 2 sec. eclipse, 1 sec. flash, 5 sec. eclipse
2. 5 sec. flash, 5 sec. eclipse
3. 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse  ← correct
4. 6 sec. flash, 6 sec. eclipse

1. 2 1/2 hours
2. 3 1/2 hours
3. 6 1/4 hours
4. 12 1/2 hours  ← correct

1. One
2. Two  ← correct
3. Three
4. Four

This question is asked against Coast Guard illustration D058NG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.

1. 0.2kts at 335°T
2. 0.1kts at 104°T  ← correct
3. 0.1kts at 280°T
4. 0.2kts at 172°T

This question is asked against Coast Guard illustration D063NG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.

1. 1559
2. 1459  ← correct
3. 1458
4. 1500

1. Stand
2. Vector direction
3. Drift
4. Set  ← correct

1. The difference between the heights of high and low tide  ← correct
2. The duration of time between high and low tide
3. The maximum depth of the water at high tide
4. The distance the tide moves out from the shore

1. 97°30'W
2. 90°00'W  ← correct
3. 82°30'W
4. 75°00'W

1. The number is multiplied by the charted depth
2. The number is the actual depth
3. The number is added to or subtracted from the charted depth  ← correct
4. The number is divided by the charted depth

1. Horizontal movement of the water toward the land after high tide
2. Horizontal movement of the water away from the land following high tide
3. Horizontal movement of the water away from the land following low tide
4. Horizontal movement of the water toward the land after low tide  ← correct

1. Drift
2. Set  ← correct
3. Vector direction
4. Stand

1. It is the velocity in knots
2. It is the direction from which it flows
3. It is the direction towards which it flows  ← correct
4. It is the estimated current

This question is asked against Coast Guard illustration D058NG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.

1. 0.8kts at 172°T
2. 0.8kts at 335°T
3. 0.3kts at 104°T
4. 0.3kts at 280°T  ← correct

This question is asked against Coast Guard illustration D063NG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.

1. 0225
2. 0301  ← correct
3. 0401
4. 0325

1. you should suspect the compass may be affected by a local magnetic disturbance
2. you know the compass error is 8°W  ← correct
3. you should apply 3°Easterly deviation to the bearing
4. you know the deviation table is incorrect

1. 2°W
2. 5°E
3. 2°E  ← correct
4. 5°W

1. 070°T  ← correct
2. 060°T
3. 090°T
4. 080°T

1. 162°T
2. 170°T  ← correct
3. 136°T
4. 128°T

1. 3°27'E
2. 3°27'W
3. 3°45'E
4. 4°03'E  ← correct

1. Compass error is the difference between true and magnetic heading
2. Compass error is variation plus compass course
3. Compass error is the sum of variation and deviation  ← correct
4. Compass error is equal to deviation minus variation

1. Electrical wiring
2. Radio
3. Iron pipe
4. All of the above  ← correct

1. The center of the compass rose on a chart of the area  ← correct
2. Variation does not change.
3. The handbook for Magnetic Compass Adjustment, Pub 226
4. The compass deviation table

1. 136°T
2. 128°T
3. 170°T  ← correct
4. 162°T

1. 291°T  ← correct
2. 296°T
3. 299°T
4. 313°T

1. 56 characters
2. 64 characters
3. 128 characters
4. 158 characters  ← correct

1. Vessel's type
2. Navigational status
3. Vessel's course
4. All of the above  ← correct

1. Vessel's type
2. Vessel's course
3. Navigational status
4. All of the above  ← correct

1. Subtract the sea water correction.
2. Add the sea water correction.
3. Subtract the draft of the vessel.
4. Add the draft of the vessel.  ← correct

1. 10 meters  ← correct
2. 20 meters
3. 50 meters
4. 92 meters

1. A shallow depth reading
2. A zero-depth reading
3. No depth reading
4. Two depth readings  ← correct

1. 36 feet (10.9 meters)  ← correct
2. 34 feet (10.3 meters)
3. 40 feet (12.1 meters)
4. 38 feet (11.5 meters)

1. mean lower low water  ← correct
2. mean high water springs
3. mean high water
4. mean low water

1. 162.400 MHz
2. 162.350 MHz
3. 162.475 MHz
4. 162.550 MHz  ← correct

1. 286 miles
2. 302 miles
3. 209 miles
4. 245 miles  ← correct

1. Gray mud  ← correct
2. Hard sand
3. Gray sand
4. Soft mud

1. 6 degrees  ← correct
2. 2 degrees
3. 11 degrees
4. 17 degrees

1. Revised edition
2. New edition  ← correct
3. First edition
4. Reprint

1. The object is a hazard to vessels drawing 20 feet draft
2. The object is always visible
3. The position is approximate or doubtful
4. The object is underwater or floating  ← correct

1. A report of a ship in distress in mid-ocean
2. The presence of a large unwieldy tow in congested offshore water
3. Extinguishment of Robbins Reef Light in New York City's Upper Bay  ← correct
4. Unexploded ordinance in ocean waters at a depth of 78 fathoms (143 meters)

1. The vertical distance from the chart sounding datum to the ocean bottom, plus the height of tide
2. The average height of water over a specified period of time
3. The average height of all low waters at a place
4. The vertical distance from the chart sounding datum to the ocean bottom  ← correct

1. National Geospatial-Intelligence Agency
2. Army Corps of Engineers
3. National Oceanic and Atmospheric Administration  ← correct
4. U.S. Coast Guard

1. Nautical chart catalogs
2. Coast Pilots
3. Notice to Mariners  ← correct
4. Sailing Directions

1. 13
2. 9A
3. 22A  ← correct
4. 44

1. 002°
2. 336°
3. 323°
4. 349°  ← correct

1. 303°T
2. 297°T
3. 300°T
4. 307°T  ← correct

1. 180°T at .4 knot
2. 162°T at .2 knot
3. 339°T at .5 knot
4. 007°T at .4 knot  ← correct

1. LAT 37°19.7'N, LONG 76°09.9'W  ← correct
2. LAT 37°19.4'N, LONG 76°09.8'W
3. LAT 37°19.7'N, LONG 76°10.3'W
4. LAT 37°19.4'N, LONG 76°09.5'W

1. 0407, 4.3 miles
2. 0427, 7.4 miles
3. 0410, 5.2 miles
4. 0417, 6.0 miles  ← correct

1. 062°T
2. 076°T
3. 245°T  ← correct
4. 259°T

1. 1339
2. 1349
3. 1342
4. 1404  ← correct

1. 2232, 3.4 miles  ← correct
2. 2228, 4.9 miles
3. 2235, 4.3 miles
4. 2241, 6.9 miles

1. 2032  ← correct
2. 2038
3. 2019
4. 2028

1. 2115
2. 2118  ← correct
3. 2121
4. 2124

1. LAT 41°12.6'N, LONG 72°17.2'W  ← correct
2. LAT 41°13.0'N, LONG 72°17.7'W
3. LAT 41°12.1'N, LONG 72°17.3'W
4. LAT 41°11.9'N, LONG 72°16.7'N

1. 298°T at 0.7 knot
2. 139°T at 1.1 knots
3. 219°T at 1.1 knots  ← correct
4. 121°T at 0.8 knot

1. 0131  ← correct
2. 0125
3. 0134
4. 0122

1. 138°psc
2. 133°psc
3. 148°psc  ← correct
4. 143°psc

1. 270.0°
2. 264.0°
3. 273.0°  ← correct
4. 267.5°

1. 209°T
2. 217°T
3. 222°T  ← correct
4. 232°T

1. 266.5°psc
2. 264.0°psc
3. 247.0°psc  ← correct
4. 245.0°psc

1. 027°T
2. 037°T
3. 044°T  ← correct
4. 054°T

1. 319°psc
2. 309°psc
3. 137°psc
4. 315°psc  ← correct

1. 9.1 knots
2. 5.6 knots
3. 8.2 knots
4. 10.9 knots  ← correct

1. 0125
2. 0131  ← correct
3. 0122
4. 0134

1. 297°T
2. 300°T
3. 303°T
4. 307°T  ← correct

1. 209°T
2. 217°T
3. 222°T  ← correct
4. 232°T

1. Stop the vessel and sound repeated blasts on the ship's whistle to scare the whale away
2. Turn away from the whale and leave at full speed
3. Turn away from the whale and leave at slow speed  ← correct
4. Slow to bare steerageway until the whale swims away

1. 200
2. 300
3. 400
4. 500  ← correct