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.
9: When displayed under a single-span fixed bridge, red lights indicate __________.
Y a. the channel boundaries N b. that vessels must stop N c. the bridge is about to open N d. that traffic is approaching from the other side 82: On the west coast of North America, charted depths are taken from __________.
N a. high water N b. mean tide level N c. mean low water Y d. mean lower low water 84: When using an echo sounder in deep water, it is NOT unusual to __________.
Y a. receive a strong return at about 200 fathoms (366 meters) during the day, and one nearer the surface at night N b. receive a first return near the surface during the day, and a strong return at about 200 fathoms (366 meters) at night N c. receive false echoes at a constant depth day and night N d. have to recalibrate every couple of days due to inaccurate readings 98: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.
N a. dead reckoning position Y b. estimated position N c. fix N d. None of the above 102: Which statement about an NGA (NIMA) chart with stock no.23BHA23433 is TRUE?
N a. This is a non-navigational or special purpose chart. N b. It is not included in the portfolio. Y c. It is a chart of an area in subregion 23. N d. It depicts a major portion of an ocean. 112: Which chart number indicates an NGA (NIMA) chart designed for inshore coastwise navigation?
N a. LCORR5868 N b. COMBT800564 N c. 17XHA17365 Y d. 16ACO16595 181: Which navigational mark may only be lettered?
N a. An unlighted, green, can buoy Y b. A spherical buoy N c. A red buoy N d. A port side day-shape 182: The scale on a chart is given as 1:5,000,000. This means that __________.
N a. 1 inch is equal to 5,000 inches on the Earth's surface N b. 1 nautical mile on the chart is equal to 5,000 inches on the Earth's surface Y c. 1 inch is equal to 5,000,000 inches on the Earth's surface N d. 1 nautical mile on the chart is equal to 5,000,000 inches on the Earth's surface 252: A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol? (D015NG )
N a. A Y b. B N c. C N d. D 414: The barometer is an instrument for measuring the __________.
N a. temperature N b. relative humidity N c. dew point Y d. atmospheric pressure 427: On 23 March 1983, at Kingston Point, NY, what is the earliest time after 1700 EST (ZD +5) that the predicted tide will be +2.0 feet?
N a. 1730 N b. 1800 Y c. 1854 N d. 2030 430: The southeast trade winds actually blow toward the __________.
N a. southeast N b. south N c. east Y d. northwest 452: When navigating in high latitudes and using a chart based on a Lambert conformal projection, __________.
Y a. a straight line drawn on the chart approximates a great circle N b. the chart should not be used outside of the standard parallels N c. the course angle is measured at the mid-longitude of the track line N d. distance cannot be measured directly from the chart 496: Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________.
N a. Indian Ocean N b. North Pacific Ocean N c. South Pacific Ocean Y d. South Atlantic Ocean 547: On 2 November 1983, at 1630 EST (ZD +5), what will be the predicted height of tide at Fulton, FL?
Y a. 2.8 feet (0.8 meters) N b. 3.4 feet (1.0 meters) N c. 4.2 feet (1.3 meters) N d. 5.6 feet (1.7 meters) 569: A line of position formed by sighting two charted objects in line is called a(n) __________.
N a. relative bearing Y b. range line N c. track line N d. estimated position 572: You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, you should set the points of the dividers at __________.
N a. 41°30' and 42°00' Y b. 41°45' and 42°15' N c. 42°00' and 42°30' N d. 42°15' and 42°45' 662: What publication contains descriptions of the coast line, buoyage systems, weather conditions, port facilities, and navigation instructions for the United States and its possessions?
Y a. Coast Pilots N b. Sailing Directions N c. Port Index N d. Light List 689: What is the index error of sextant C? (D050NG )
Y a. 0'20" on the arc N b. 1'00" on the arc N c. 2'00" on the arc N d. 5'10" on the arc 739: The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, the great circle track will cross the equator in LONG __________.
Y a. 114°00'W N b. 110°00'W N c. 66°00'W N d. 66°00'E 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 785: An amplitude of the Sun in high latitudes __________.
N a. is most accurate before sunrise N b. is most accurate after sunset N c. should only be observed when the Sun's lower limb is above the horizon Y d. is most accurate when the Sun's center is observed on the visible horizon 795: The path of a celestial body during its daily apparent revolution around the Earth is called its __________.
N a. ecliptic Y b. diurnal circle N c. altitude circle N d. circle of position 875: Sidereal hour angle is always __________.
N a. measured westward from the hour circle containing the first point of Aries N b. measured from the point on the celestial sphere occupied by the Sun at the vernal equinox N c. subtracted from the LHA of the star to obtain the LHA of Aries Y d. All of the above 921: Under the IALA-B Buoyage System, a conical buoy will be __________.
Y a. red in color N b. numbered with an odd number N c. left to port when entering from seaward N d. All of the above 964: The thin, whitish, high clouds composed of ice crystals, popularly known as "mares' tails" are __________.
Y a. cirrus N b. cirrocumulus N c. altostratus N d. nimbostratus 986: A warm air mass is characterized by __________.
Y a. stability N b. instability N c. gusty winds N d. good visibility 1032: What is the approximate geographic range of Point Judith Light, Rhode Island, if your height of eye is 62 feet (18.9 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 9.6 nm N b. 16.5 nm Y c. 18.6 nm N d. 20.7 nm 1077: A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing, the water of __________.
N a. high density will be on the left in the Northern Hemisphere N b. high density will be on the right in the Southern Hemisphere Y c. low density will be on the left in the Northern Hemisphere N d. low density will be on the left in the Southern Hemisphere 1101: In the North Sea area, you sight a buoy showing an uninterrupted quick-flashing white light. Which of the four topmarks shown will this buoy be fitted with under the IALA Buoyage system? (D031NG )
N a. A Y b. B N c. C N d. D 1154: The speed at which an ocean wave system advances is called __________.
N a. wave length N b. ripple length Y c. group velocity N d. wave velocity 1183: The principal purpose of magnetic compass adjustment is to __________.
N a. reduce the variation as much as possible Y b. reduce the deviation as much as possible N c. reduce the magnetic dip as much as possible N d. allow the compass bowl to swing freely on its gimbals 1286: Which condition will occur after a cold front passes?
N a. Temperature rises N b. Stratus clouds form N c. Pressure decreases Y d. Humidity decreases 1370: Which type of cloud is indicated by the number 8? (D039NG )
N a. Cumulonimbus N b. Altostratus N c. Cirrostratus Y d. Nimbostratus 1527: Your vessel is on course 270°T, speed 10 knots. The apparent wind is from 10° off the port bow, speed 30 knots. From which direction is the true wind?
N a. 345°T Y b. 255°T N c. 165°T N d. 075°T 1568: You are approaching a vertical lift bridge. You know the span is fully open when __________.
N a. three white lights in a vertical line are lit N b. a red light starts to flash at about 60 times a minute N c. a yellow light is illuminated on the bridge pier Y d. there is a range of green lights under the lift span 1629: Air temperature varies with __________.
N a. the altitude above sea level N b. the season of the year N c. the latitude or distance from the equator Y d. All of the above 1681: You can expect frontal activity when two air masses collide and __________.
N a. their barometric pressures and temperatures are the same N b. there are differences in how they track along the jet stream N c. there are no significant differences between their temperatures and moisture content Y d. there are significant differences between the temperature of each air mass 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 1779: The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 14 miles and your height of eye is 20 feet, at which approximate distance will you sight the light?
N a. 7.5 miles Y b. 11.2 miles N c. 14.0 miles N d. 18.1 miles 1816: A white buoy with an orange circle marked on it indicates __________.
N a. danger N b. vessels are excluded from the area N c. a mooring buoy Y d. operating restrictions are in effect 1860: A vessel heading WSW is on a course of __________.
N a. 202.5° N b. 225.0° Y c. 247.5° N d. 271.0° 1872: To find a magnetic compass course from a true course you must apply __________.
N a. deviation N b. variation Y c. deviation and variation N d. magnetic anomalies (local disturbances) 1887: The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 15 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
N a. 12.0 miles N b. 11.0 miles N c. 10.0 miles Y d. 9.0 miles 2054: The diagram is of a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter B? (D038NG )
N a. One red light N b. Two green lights N c. Three green lights Y d. No lights 2060: What is the relative bearing of an object broad on the starboard quarter?
N a. 045° N b. 090° Y c. 135° N d. 225° 2232: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. Which action should be taken to remove this error during compass adjustment?
N a. If the red ends are to starboard you should raise the athwartships tray. Y b. If the red ends are to starboard, and the athwartships tray is at the bottom, you should remove some magnets. N c. If the red ends are to port, and the athwartships tray is at the top, you should reverse the magnets. N d. If the red ends are to port, and the athwartships tray is at the top, you should lower the tray. 2272: Mars will not be visible __________.
N a. at elongation angles near 180° N b. from quadrature to opposition Y c. at conjunction N d. at opposition 2301: The letter C in illustration D006NG represents the __________.
Y a. celestial horizon N b. geoidal horizon N c. visible horizon N d. sensible horizon 2472: The Sun is closest to the Earth in what month?
N a. October N b. July N c. April Y d. January 2586: A chart has extensive corrections to be made to it. When these are made and the chart is again printed, the chart issue is a __________.
N a. first edition Y b. new edition N c. revised edition N d. reprint 2588: You are approaching an open drawbridge and sound the proper signal. You receive no acknowledgment from the bridge. Which action should you take?
Y a. Approach with caution and proceed through the open draw. N b. Approach under full control to a position no closer than 400 yards from the bridge and await a signal from the bridge. N c. Hold in the channel as a vessel is closing the bridge from the other direction. N d. Resound the opening signal and do not pass through the bridge until signals have been exchanged. 2596: The abbreviation L.W.R.P. on the navigation maps means __________.
Y a. low water reference plane N b. low winter runoff point N c. least water river plane N d. land wall reference point 2848: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 6 seconds after the signal was sounded. What is the distance to the shore?
N a. 1200 yards Y b. 1100 yards N c. 1000 yards N d. 900 yards 2860: On the Mississippi and Ohio Rivers, there is a special type of fog known as steam fog. It is caused by __________.
N a. warm air passing over much colder water Y b. cold air passing over much warmer water N c. a rapid cooling of the ground on a clear night N d. rain coming out of a warm air mass aloft 2875: A harbor chart could have a scale of __________.
N a. not more than 1:25,000 Y b. 1:35,000 N c. 1:150,000 N d. not less than 1:500,000 2986: Some places maintain a zone time of -13. What are the time and date at Greenwich if the zone time and date are 2152, 10 January?
N a. 1052, 9 January Y b. 0852, 10 January N c. 1052, 10 January N d. 1052, 11 January 3019: Where would you find information about the time of high tide at a specific location on a particular day of the year?
Y a. Tide Tables N b. Tidal Current Tables N c. Coast Pilot N d. Nautical Almanac 3041: The letter H in illustration D006NG represents the __________.
N a. refractive horizon N b. geoidal horizon N c. celestial horizon Y d. visible horizon 3067: Which of the following are data layer categories to be displayed on ECDIS?
N a. ECDIS warnings and messages N b. Hydrographic Office data N c. Notice to Mariners information Y d. All of the above