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.
35: You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT?
N a. 1200, 3 July N b. 2000, 3 July N c. 1200, 2 July Y d. 2000, 2 July 41: Mean high water is the reference plane used for __________.
N a. all vertical measurements Y b. heights above water of land features such as lights N c. soundings on the East and West Coasts N d. water depths on the East Coast only 44: The speed of sound through ocean water is nearly always __________.
Y a. faster than the speed of calibration for the fathometer N b. the same speed as the speed of calibration for the fathometer N c. slower than the speed of calibration for the fathometer N d. faster than the speed of calibration for the fathometer, unless the water is very warm 71: A preferred-channel buoy may be __________.
Y a. lettered N b. spherical N c. showing a white light N d. All of the above 80: When the moon is at first quarter or third quarter phase, what type of tides will occur?
N a. Apogean N b. Perigean Y c. Neap N d. Spring 144: In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n) __________.
N a. transmitter Y b. transducer N c. transceiver N d. amplifier 161: How is a safe water mark, that can be passed close aboard on either side, painted and lighted?
N a. Black and white stripes with an interrupted quick flashing light N b. Black and red stripes with a Morse (A) light N c. Black and red stripes with an interrupted quick flashing light Y d. Red and white stripes with a Morse (A) light 272: What does the symbol shown indicate on a chart? (D033NG )
N a. A sunken vessel marked by a buoy Y b. A safe water beacon N c. A red and white can buoy N d. A can buoy with a rotating white light 351: Which buoy may be odd numbered?
N a. A spherical buoy Y b. An unlighted can buoy N c. A red buoy N d. A yellow buoy 355: During the month of October the Sun's declination is __________.
N a. north and increasing N b. north and decreasing Y c. south and increasing N d. south and decreasing 372: You would find the variation on a polyconic projection chart __________.
Y a. on the compass rose N b. on the mileage scale N c. written on the chart title N d. at each line of longitude 429: A great circle crosses the equator at 127°W. It will also cross the equator at what other longitude?
N a. 127°E Y b. 53°E N c. 27°E N d. 27°W 448: Mean high water is the reference datum used to measure __________.
N a. soundings on the east coast of the United States N b. soundings in European waters Y c. heights of topographical features in the United States N d. both heights and soundings worldwide 517: On 5 March 1983, at 0630 EST (ZD +5), what will be the predicted height of tide at Ocracoke, Ocracoke Inlet, NC?
Y a. 0.1 foot N b. 1.2 feet N c. 1.9 feet N d. 2.3 feet 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 587: Your vessel has a draft of 34 feet. On 8 October 1983 you wish to pass over an obstruction near Jaffrey Point, NH, that has a charted depth of 31 feet. Allowing for a safety margin of 3 feet, what is the earliest time after 0900 DST (ZD +4) that this passage can be made?
N a. 0920 Y b. 1029 N c. 1120 N d. 1159 620: Chart legends which indicate a conspicuous landmark are printed in __________.
Y a. capital letters N b. italics N c. boldface print N d. underlined letters 762: Chart correction information is NOT disseminated through the __________.
N a. Summary of Corrections N b. Local Notice to Mariners N c. Daily Memorandum Y d. Chart Correction Card 882: 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 are listed in the Light List in which of the following manners?
N a. Geographical positions outlining the area of the sector Y b. True bearings as observed from the ship toward the light N c. An outline of the area of the sector N d. True bearings as observed from the light toward the ship 944: High clouds, composed of small white flakes or scaly globular masses, and often banded together to form a "mackerel sky", would be classified as __________.
N a. cirrus Y b. cirrocumulus N c. altostratus N d. cumulonimbus 997: A coastal current __________.
N a. is generated by waves striking the beach Y b. flows outside the surf zone N c. flows in a circular pattern N d. is also known as a longshore current 1009: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 34°F, and the wet bulb thermometer reads 31°F. Using the ships code card, how would you encode the air temperature groups in the report? (D041NG )
N a. 10340, 2127/ N b. 10111, 2104/ Y c. 10011, 2104/ N d. 10340, 2031/ 1145: The GHA of a star __________.
Y a. increases at a rate of approximately 15° per hour N b. increases at a rate of approximately 4° per hour N c. decreases at a rate of approximately 15° per hour N d. decreases at a rate of approximately 4° per hour 1168: Which type of cloud is indicated by the number 4? (D039NG )
N a. Altocumulus N b. Cirrostratus N c. Cumulus Y d. Altostratus 1203: If the compass heading and the magnetic heading are the same then __________.
N a. the deviation has been offset by the variation N b. there is something wrong with the compass N c. the compass is being influenced by nearby metals Y d. there is no deviation on that heading 1254: Lighted white and orange buoys must show which color light?
N a. Orange Y b. White N c. Red N d. Alternating yellow and white 1258: You should log all barometer readings taken at sea __________.
N a. regularly N b. at least once during each watch N c. more often under changeable weather conditions Y d. All of the above 1388: If you observe a rapid fall of barometric pressure you should __________.
N a. call the Coast Guard to verify the change N b. know the barometer is not working properly N c. contact the NWS or a local radio station Y d. prepare for the onset of stormy weather with strong winds 1465: The planet Venus can be observed in the morning before sunrise if it is well to the __________.
Y a. west of and higher than the Sun N b. west of and lower than the Sun N c. east of and higher than the Sun N d. east of and lower than the Sun 1495: A great circle crosses the equator at 157°W. It will also cross the equator at what other longitude?
N a. 157°E N b. 57°E Y c. 23°E N d. 57°W 1512: You are plotting a running fix. The LOP to be run forward is an arc from a radar range, what technique should be used?
N a. The arc should be converted into a straight line using offsets and then run forward. N b. An arc should never be run forward. Y c. The position of the object observed should be advanced to the new time and a new arc swung using the radius of the old arc. N d. The distance between LOP's should be added to the radar range and a new arc swung. 1716: The hurricane season in the North Atlantic Ocean reaches its peak during the month of __________.
N a. June Y b. September N c. November N d. July 1737: You can determine if your vessel's position is in the dangerous or navigable semicircle of a hurricane by __________.
N a. observing whether the wind is veering or backing N b. plotting two or more recent storm positions from weather bulletins Y c. Both A and B N d. Neither A nor B 1829: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter E in the illustration? (D036NG )
N a. One red light N b. Two green lights N c. Three green lights Y d. No light 1873: Lighted information markers show __________.
N a. green lights N b. red lights N c. yellow lights Y d. white lights 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 1907: Information about direction and velocity of rotary tidal currents is found in the __________.
N a. Tide Tables N b. Nautical Almanac Y c. Tidal Current Tables N d. Mariner's Guide 1960: Astronomical refraction causes a celestial body to appear __________.
N a. to the left of its position in the Northern Hemisphere and to the right in the Southern Hemisphere N b. to the right of its position in the Northern Hemisphere and to the left in the Southern Hemisphere Y c. higher than its actual position N d. lower than its actual position 2024: In the North Sea area, you sight a buoy with a quick light showing 3 flashes every 10 seconds. Which topmark in illustration D030NG would be fitted to this buoy under the IALA Buoyage Systems? (D030NG )
N a. A N b. B N c. C Y d. D 2080: You are on course 030°T. The relative bearing of a lighthouse is 45°. What is the true bearing?
N a. 015° Y b. 075° N c. 255° N d. 345° 2116: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of the __________.
N a. Nautical Almanac for the year Y b. U.S. Army Corps of Engineers Regulations (Blue Book) N c. Sailing Directions N d. All of the above 2126: Your chart indicates that there is an isolated rock and names the rock using vertical letters. This indicates the __________.
N a. rock is visible at low water springs only N b. rock is a hazard to deep draft vessels only Y c. rock is dry at high water N d. exact position of the rock is doubtful 2163: The letter C in illustration D006NG represents the __________.
N a. visible horizon N b. geoidal horizon Y c. celestial horizon N d. sensible horizon 2182: Diagram Number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash?
N a. No lights Y b. One red light N c. Two red lights N d. Three red lights 2226: Upper limb observations of the Moon are used more frequently than those of the Sun because of the location of the Moon in the sky and the __________.
N a. lesser distance between the Earth and the Moon Y b. phase of the Moon N c. rapid change in declination of the Moon N d. effects of augmentation and horizontal parallax 2237: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
N a. light characteristic of Morse (A) N b. white light N c. green light Y d. red light 2326: A double star is a star that __________.
N a. has a declination equal to twice that of the Sun Y b. comprises two stars that appear close together N c. is twice as bright as a single star N d. suddenly becomes much brighter and then fades 2532: You must construct a Mercator plotting sheet on a piece of paper measuring 28" by 32". The area includes latitude 32°S to 39°S and longitude 005°E to 003°W. Allow a one-half inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?
Y a. 3.38 inches N b. 3.62 inches N c. 3.79 inches N d. 3.95 inches 2578: You must draw a plotting sheet covering latitudes 49°N to 53°N and longitudes 179°E to 178°W. If the distance between latitude 49°N to 53°N is 16 inches, what is the distance between the meridians of 1° of longitude?
N a. 2.12 inches N b. 2.33 inches Y c. 2.56 inches N d. 2.81 inches 2606: The measurement of local time is based on the passage of the Sun over the __________.
N a. upper branch of the observer's meridian Y b. lower branch of the observer's meridian N c. upper branch of the Greenwich meridian N d. lower branch of the Greenwich meridian 2694: What is the equivalent of 10°48' in time units?
N a. 2 min. 39 sec. N b. 20 min. 12 sec. Y c. 43 min. 12 sec. N d. 50 min. 12 sec. 2709: Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which of the topmarks shown? (D046NG )
N a. A N b. B N c. C Y d. D 2777: A sailing chart could have a scale of __________.
N a. not more than 1:25,000 N b. 1:35,000 N c. 1:100,000 Y d. 1:700,000 2804: The altitude at LAN may be observed by starting several minutes in advance and continuing until a maximum altitude occurs. This procedure should not be used __________.
N a. when the declination and latitude are of different names N b. when the declination is greater than and the same name as the latitude N c. if the vessel is stopped or making bare steerageway Y d. on a fast vessel on northerly or southerly headings 2974: What daymark shape is used in the lateral system?
N a. Semicircle Y b. Triangle N c. Pentagon N d. Diamond 2974: What daymark shape is used in the lateral system?
N a. Semicircle Y b. Triangle N c. Pentagon N d. Diamond 3025: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
Y a. estimated position N b. dead-reckoning position N c. fix N d. running fix 3086: Which data must ECDIS be able to record at one-minute intervals?
Y a. Course made good history N b. Estimated time of arrival N c. Speed through the water N d. Shaft RPM 3092: ECDIS must be able to perform all of the following EXCEPT __________.
N a. determine true bearing and distance between two geographical points Y b. determine magnetic compass deviation N c. transform a local datum to the WGS-'84 datum N d. convert "graphical coordinates" to "display coordinates" 3105: An automatic identification system (AIS) transponder transmits and receives information broadcasts on _____?
N a. 10 cm, S-band radar N b. 3 cm, X-band radar N c. UHF L-band Y d. VHF maritime band