This is an interactive test. Read each question and select the proper answer by clicking on the appropriate answer. If a "Y" appears, your choice is correct. If a "N" appears, more study may be in order.
10: The wind at Frying Pan shoals has been northwesterly at an average velocity of 22 knots. The predicted set and drift of the rotary current are 125° at 0.6 knot. What current should you expect?
Y a. 119° at 0.9 knot N b. 172° at 1.1 knots N c. 225° at 0.6 knot N d. 340° at 0.4 knot 19: You are approaching a swing bridge at night. You will know that the bridge is open for river traffic when __________.
N a. the fixed, green light starts to flash N b. the amber light changes to green N c. the red light is extinguished Y d. the red light changes to green 26: Wind direction may be determined by observing all of the following EXCEPT __________.
N a. low clouds N b. waves N c. whitecaps Y d. swells 108: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.
N a. dead-reckoning position N b. estimated position Y c. fix N d. running fix 133: The line connecting the Loran-C master station with a secondary station is called the __________.
N a. focus line Y b. base line N c. side line N d. center line 163: How many fixed objects are needed to plot a running fix?
N a. None Y b. One N c. Two N d. Three 237: Neap tides occur when the __________.
Y a. Moon is in its first quarter and third quarter phases N b. Sun and Moon are on opposite sides of the Earth N c. Moon's declination is maximum and opposite to that of the Sun N d. Sun and Moon are in conjunction 341: Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic?
N a. Flashing N b. Quick flashing Y c. Composite group flashing N d. Equal interval (isophase) 455: The height of eye correction is smaller than geometrical dip because of __________.
N a. the angle between the horizontal and the line of sight to the visible horizon N b. index error N c. parallax Y d. terrestrial refraction 471: Yellow lights may appear on __________.
Y a. special purpose buoys N b. vertically-striped buoys N c. horizontally-banded buoys N d. spherical buoys 474: Which indication on the barometer is most meaningful in forecasting weather?
N a. The words "Fair -- Change -- Rain" Y b. The direction and rate of change of barometric pressure N c. The actual barometric pressure N d. The relative humidity 639: In the Northern Hemisphere, what type of cloud formations would you expect to see to the west of an approaching tropical wave?
Y a. Cumulus clouds lined up in rows extending in a northeast to southwest direction N b. High altostratus clouds in the morning hours N c. Cirrostratus clouds lined up in rows extending in a northeast to southwest direction N d. Cirrostratus clouds lined up in rows extending in a north to south direction 650: What classification of tropical cyclone would have closed isobars, counter clockwise rotary circulation, and sustained winds between 34 and 63 knots?
N a. A tropical disturbance N b. A tropical depression Y c. A tropical storm N d. A hurricane 781: The IALA Buoyage Systems do NOT apply to __________.
N a. the sides and centerlines of navigable channels N b. natural dangers and other obstructions, such as wrecks Y c. lighthouses and lightships N d. areas in which navigation may be subject to regulation 836: In North America the majority of the weather systems move from __________.
N a. north to south N b. south to north N c. east to west Y d. west to east 841: Under the IALA-A Buoyage system, a buoy marking the port hand of the channel when approaching from seaward may NOT have a __________.
N a. red light Y b. conical shape N c. group-flashing light N d. square topmark 856: The flow of air around an anticyclone in the Southern Hemisphere is __________.
N a. clockwise and outward Y b. counterclockwise and outward N c. clockwise and inward N d. counterclockwise and inward 858: Your ship is proceeding on course 320°T at a speed of 25 knots. The apparent wind is from 30° off the starboard bow, speed 32 knots. What is the relative direction, true direction and speed of the true wind?
Y a. Relative 80°true 040°T, 16.2 knots N b. Relative 40°true 080°T, 16.4 knots N c. Relative 80° true 060°T, 15.2 knots N d. Relative 60°true 040°T, 18.6 knots 871: Under the IALA-A Buoyage System, a buoy marking the starboard side of the channel when approaching from seaward must have a(n) __________.
N a. pillar shape Y b. green color N c. square topmark N d. even number 876: A generally circular low pressure area is called a(n) __________.
Y a. cyclone N b. anticyclone N c. cold front N d. occluded front 945: What is NOT a side of the navigational triangle used in sight reduction?
Y a. Altitude N b. Zenith distance N c. Colatitude N d. Polar distance 946: The wind circulation around a high pressure center in the Northern Hemisphere is __________.
N a. counterclockwise and moving towards the high N b. counterclockwise and moving outward from the high N c. clockwise and moving towards the high Y d. clockwise and moving outward from the high 972: In which source could you find the number of a chart for a certain geographic area?
N a. Chart No. 1 Y b. Catalog of Charts N c. American Practical Navigator N d. U.S. Coast Guard Light List 984: The bases of middle clouds are located at altitudes of between __________.
N a. 3,000 to 6,500 feet (914 to 1981 meters) Y b. 6,500 to 20,000 feet (1981 to 6096 meters) N c. 10,000 to 35,000 feet (3048 to 10,668 meters) N d. 20,000 to 60,000 feet (6096 to 18,288 meters) 1020: The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 40 feet (12.2 meters) and the visibility is 27.0 miles. At which approximate range will you first sight the light?
N a. 5.6 miles N b. 6.4 miles Y c. 9.8 miles N d. 12.1 miles 1027: In the Northern Hemisphere the major ocean currents tend to flow __________.
Y a. clockwise around the North Atlantic and North Pacific Oceans N b. clockwise or counterclockwise depending on whether it is warm or cold current N c. counterclockwise except in the Gulf Stream N d. counterclockwise around the North Atlantic and North Pacific Oceans 1053: Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors are the __________.
N a. fore-and-aft and athwartships magnets N b. dip needle and heeling magnet N c. heeling magnet and Flinders bar Y d. Flinders bar and quadrantal spheres 1099: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the course to steer at 9 knots to intercept vessel A?
N a. 356° Y b. 003° N c. 022° N d. 038° 1130: During daylight savings time the meridian used for determining the time is located farther __________.
N a. west in west longitude and east in east longitude N b. east in west longitude and west in east longitude N c. west Y d. east 1321: A lighthouse can be identified by its __________.
N a. painted color N b. light color and phase characteristic N c. type of structure Y d. All of the above 1499: You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?
Y a. Starting with a dash and extending radially outward from the target N b. As a broken line from center of PPI to the target N c. Starting with a dot and extending radially inward from the target N d. Starting with a dash and extending to the right of the target 1522: The pressure-sensitive element of an aneroid barometer is called a __________.
N a. pressure bellows Y b. sylphon cell N c. column of mercury N d. constant pressure capsule 1523: Which is a characteristic of the weather preceding an approaching warm front?
N a. Gusty winds Y b. Steadily falling barometric pressure N c. Decreasing relative humidity N d. Clearing skies 1529: Widely spaced isobars on a weather map indicate __________.
N a. high winds Y b. gentle breezes N c. ice, snow or frozen rain N d. probability of tornados 1538: The winds of the "roaring forties" are strongest near __________.
N a. 40°N N b. 50°N N c. 40°S Y d. 50°S 1556: The vertical distance from the tidal datum to the level of the water is the __________.
N a. range of tide N b. charted depth Y c. height of tide N d. actual water depth 1615: The Illustration shows the symbols used on radio facsimile weather charts. Which symbol indicates snow? (D042NG )
N a. G N b. H Y c. M N d. N 1636: A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as __________.
N a. sleet Y b. hail N c. freezing rain N d. rime 1724: What is the first visible indication of the presence of a tropical cyclone or hurricane?
N a. Stratocumulus clouds or strange birds N b. Rain and increasing winds Y c. An exceptionally long swell N d. Dark clouds and the "bar" of the storm 1733: An instrument which maintains a continuous record of temperature changes is called a __________.
N a. thermometer N b. barometer Y c. thermograph N d. hygrograph 1771: Which type of precipitation is a product of the violent convection found in thunderstorms?
N a. Snow N b. Freezing Rain Y c. Hail N d. Sleet 1905: In order to insure that the racon signal is visible on your 3 cm radar, the __________.
N a. 10 cm radar should be placed on standby or turned off N b. gain control should be turned to maximum N c. radar should be stabilized, head up Y d. rain clutter control should be off but, if necessary, may be on low 2006: What is the relative bearing of an object broad on the port beam?
N a. 315° N b. 300° Y c. 270° N d. 235° 2093: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained from the __________.
N a. Light List Vol. V N b. List of Lights Y c. Broadcast Notice to Mariners N d. Sailing Directions 2254: A rock and sand structure extending from the bank of the river toward the channel is known as a __________.
Y a. wingdam N b. towhead N c. cutoff N d. landwall 2396: Perihelion is the point where the Sun __________.
Y a. is nearest to the Earth N b. is farthest from the Earth N c. is on the opposite side of the Earth from the Moon N d. and Moon and Earth are in line 2396: Perihelion is the point where the Sun __________.
Y a. is nearest to the Earth N b. is farthest from the Earth N c. is on the opposite side of the Earth from the Moon N d. and Moon and Earth are in line 2440: You are on course 357°T and take a relative bearing of a lighthouse of 180°. What is the true bearing to the lighthouse?
N a. 003° N b. 227° Y c. 177° N d. 363° 2654: What is the equivalent of 5°54' in time units?
N a. 20 min. 16 sec. Y b. 23 min. 36 sec. N c. 25 min. 54 sec. N d. 30 min. 27 sec. 2680: The angle measured eastward from the vernal equinox along the celestial equator often expressed in time units is the __________.
N a. Greenwich sidereal time Y b. right ascension N c. local sidereal time N d. sidereal hour angle 2704: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the starboard side of a vessel __________.
N a. proceeding from seaward N b. crossing the river N c. ascending the river Y d. descending the river 2821: The height of tide is the __________.
N a. difference between the depth of the water at high tide and the depth of the water at low tide N b. depth of water at a specific time due to tidal effect Y c. difference between the depth of the water and the area's tidal datum N d. difference between the depth of the water and the high water tidal level 2842: The draw span of a floating drawbridge may be marked with __________.
N a. two white lights Y b. a yellow diamond N c. flashing blue lights N d. three red lights on each side of the draw 2916: You take a bearing of 191° and 313° to two objects. Which bearing of a third object will give the best fix?
N a. 022° N b. 131° N c. 211° Y d. 249° 2972: You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to starboard will have the shape indicated by what letter in illustration D045NG?
Y a. A N b. B N c. C N d. D 3072: ECDIS must give an alarm for which of the following cases?
N a. When the specified limit for deviation from the planned route is exceeded N b. If the ship, within a specified time set by the watch officer, is going to cross a safety contour N c. If the ship, within a specified time set by the watch officer, is going to cross the boundary of a prohibited area Y d. All of the above 3082: Which type of GPS receiver has at least four channels to process information from several satellites simultaneously?
N a. Sequential Y b. Continuous N c. Multiplex N d. None of the above 3085: An ECDIS is required to display which information?
N a. Water temperature N b. Climatology data N c. Speed of advance Y d. Depth contours 3106: What does an automatic identification system (AIS) transponder use to transmit and receive information broadcasts?
N a. 3000 Mhz and 9200 Mhz N b. 2182 Khz and 2187.5 Khz Y c. 156.525 Mhz, 161.975 Mhz and 162.025 Mhz N d. 1575.42 Mhz and 1227.6 Mhz 3123: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. N b. AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. Y c. AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position and other safety related information frequently to similarly equipped vessels, aircraft and shore stations within the area. N d. AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area.