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.
65: What are the dimensions of the Old River Lock on the Lower Old River (mile 304 AHP)?
N a. 1202 x 84 feet N b. 1200 x 75 feet N c. 1195 x 75 feet Y d. 1190 x 75 feet 101: At 1430 on 13 August, you pass Carolina Landing Light (mile 508.8 AHP). What has been the average current since 0230, 13 August if you have been making turns for 8.0 mph?
N a. 8.5 mph N b. 5.7 mph N c. 1.5 mph Y d. 0.5 mph 160: How far is it to the Hernando Desoto Bridge in Memphis, TN?
N a. 980.8 miles N b. 736.6 miles Y c. 218.1 miles N d. 202.4 miles 276: At 1200, your position is 2.0 miles southwest of Bartlett Reef Light. Your heading is 075°T. Visibility is less than 0.2 mile in fog and rain. Which of the following signals is most likely to be from another vessel?
N a. Whistle from 125° relative N b. Bell from 350° relative Y c. Whistle from 075° relative N d. Horn from 330° relative 419: At 0900, you take the following radar ranges:
Watch Hill Point 5.4 miles
Block Island Grace Point 8.3 miles
Which statement about this fix is TRUE?
N a. You are to the left of the track line. N b. The bottom in the area is sand and gravel. N c. You are governed by the Inland Rules. Y d. The fix is indeterminate. 452: Determine the great circle distance and initial course from LAT 35°17.6'N, LONG 144°23.0'E to LAT 47°36.0'N, LONG 124°22.0'W.
N a. 3946 miles, 312°T Y b. 3931 miles, 048°T N c. 3881 miles, 042°T N d. 3718 miles, 318°T 674: What are the dimensions of the Port Allen Lock at Baton Rouge, LA?
N a. 75 feet x 1188 feet Y b. 84 feet x 1188 feet N c. 84 feet x 1180 feet N d. 75 feet x 1180 feet 980: On 29 April , your 0530 zone time position was LAT 23°04.0'S, LONG 162°12.0'E. Your vessel was steaming on course 120°T at a speed of 9.0 knots. An observation of the Sun's upper limb was made at 0830 ZT. The chronometer read 09h 27m 32s and was slow 02m 24s. The observed altitude (Ho) was 24°58.0'. LAN occurred at 1205 zone time. The observed altitude (Ho) was 52°04.0'. What was the longitude of your 1200 zone time running fix?
N a. LONG 163°02.1'E Y b. LONG 163°06.0'E N c. LONG 163°09.5'E N d. LONG 163°11.3'E 1092: On 3 April , your vessel's 1400 ZT DR position is LAT 20°08.0'N, LONG 147°45.0'W. You are steering course 023°T at 18.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1900 running fix. NP-0022
N a. LAT 21°39.8'N, LONG 146°59.7'W Y b. LAT 21°40.0'N, LONG 147°03.2'W N c. LAT 21°41.8'N, LONG 147°05.5'W N d. LAT 21°41.8'N, LONG 147°01.5'W 1237: At 1118, on 24 May, you pass Natchez Gage and estimate the current will average 3.0 mph for the remainder of the time on the Mississippi River. What is your ETA at Cairo, IL if you continue to turn for 10 mph?
N a. 0840, 26 May N b. 2218, 26 May Y c. 2339, 27 May N d. 0339, 28 May 1545: You are downbound, passing by Warfield Point Lt. (mile 537 AHP), when you observe on your Mississippi River map several black lines extending into the river from the bank. These indicate __________.
N a. revetments N b. weirs N c. fleeting areas Y d. dikes 1668: On 20 June , your vessel's 1955 ZT DR position is LAT 52°38.9'N, LONG 03°42.7'E, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 311° per gyrocompass. Variation in the area is 6°W. At the time of the observation, the helmsman noted that he was heading 352° per gyrocompass and 358° per steering compass. What is the gyro error and deviation for that heading?
N a. 1.3°W GE, 1.3°E DEV N b. 0.0° GE, 0.0° DEV N c. 1.3°W GE, 1.3°W DEV Y d. 1.3°E GE, 1.3°E DEV 1672: On 11 May , your vessel's 1839 ZT position is LAT 17°30'N, LONG 63°55'W, when an amplitude of the Sun's center is observed on the celestial horizon bearing 301° per standard magnetic compass. Variation for this area is 10.5°W. The chronometer reads 10h 37m 10s and is 02m 08s slow. What is the deviation of the compass?
N a. 2.5°W N b. 2.0°W Y c. 1.5°W N d. 2.0°E 1883: On 13 June , your 0445 DR position is LAT 20°12.0'N, LONG 44°45.0'W. You observe an unidentified star bearing 168°T at an observed altitude (Ho) of 38°56.0'. The chronometer reads 07h 43m 20s, and is 01m 39s slow. Which star did you observe?
N a. Peacock N b. Ankaa N c. Al Na'ir Y d. Fomalhaut 1963: Which of the following statements are TRUE?
N a. Oil well structures are listed in the Light List. N b. All aids to navigation with lights have lateral significance. Y c. On the Western Rivers, crossing marks may exhibit white lights. N d. All of the above. 2052: The highest point on your towboat is 48 feet above the water, and the Memphis Gage reads +7.5 feet. What is the vertical clearance when you pass under the Hernando Desoto Bridge in Memphis?
Y a. 53.2 feet N b. 58.1 feet N c. 68.2 feet N d. 96.3 feet 2088: At your current speed of 19 knots you only have enough fuel remaining to travel 265 miles. You must travel 731 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?
N a. 13.8 N b. 12.6 Y c. 11.4 N d. 10.2 2094: At your current speed of 20 knots you only have enough fuel remaining to travel 218 miles. You must travel 395 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?
N a. 17.4 N b. 16.2 Y c. 14.9 N d. 13.7 2166: On 10 January , at 0550 ZT, morning stars were observed, and the vessel's position was determined to be LAT 25°16.0'N, LONG 123°18.0'W. Your vessel is steaming at 22.0 knots on a course of 295°T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 05h 14m 02s, and the sextant altitude is 24°00.7'. The index error is 2.6' off the arc, and the chronometer error is 01m 34s slow. Your height of eye on the bridge is 55.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
N a. 127.8°T N b. 129.8°T Y c. 131.9°T N d. 133.6°T 2175: On 13 November , at 0438 ZT, morning stars were observed and the vessel's position was determined to be LAT 22°14.0'S, LONG 79°23.0'E. Your vessel is steaming at 13.0 knots on a course of 242°T. A sextant observation of the Sun's lower limb is made at 0822 ZT. The chronometer reads 03h 20m 16s, and the sextant altitude (hs) is 45°49.7'. The index error is 1.0' on the arc, and the chronometer error is 01m 47s slow. Your height of eye on the bridge is 61.0 feet (18.6 meters). What is the azimuth (Zn) of this sight using the assumed position?
Y a. 092.6°T N b. 096.2°T N c. 098.7°T N d. 099.7°T 2186: At 0922, on 24 May, you are abreast the St. Catherine Bar Lt. (mile 348.6 AHP). If you are turning for 8.0 mph, what is the current?
Y a. 1.0 mph N b. 1.4 mph N c. 2.0 mph N d. 7.0 mph 2245: You are entering the channel at buoy 29 and turning for 9 knots. An easterly wind is causing 3°
of leeway and the current is 320°T at 1.2 knots. What true course should you steer to remain in the middle leg of York Spit Channel?
N a. 162°T Y b. 165°T N c. 168°T N d. 171°T 2281: You observe the lower limb of the Sun at a sextant altitude (hs) of 62°22.2' on 6 June . The index error is 1.2' on the arc. The height of eye is 28 feet (8.5 meters). What is the observed altitude (Ho)?
N a. 62°24.8' N b. 62°26.9' Y c. 62°31.4' N d. 62°36.7' 2296: If your vessel is making turns for 7.5 mph with an estimated average current of 1.5 mph, what is your ETA at the dock in Angelina, LA?
Y a. 1621, 28 Dec N b. 2203, 28 Dec N c. 0516, 29 Dec N d. 1621, 29 Dec 2533: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
N a. List of Buoys and Daymarks N b. Coast Pilot N c. Army Corps. of Engineers Navigation Chart Y d. U.S.C.G. Local Notice to Mariners 2534: Your company wants to know at what time you will be arriving at the fleeting area at Sycamore Chute Light (mile 740.3 AHP) in Memphis, TN You are making turns for 9.0 mph and you estimate the average current at 2.2 mph. Figuring the distance and time from Hole in the Wall Lt. (mile 373.4 AHP), what is your ETA at Sycamore Chute Lt.?
N a. 0557, April 19th N b. 1045, April 19th Y c. 1242, April 19th N d. 1733, April 19th 2675: At 1423 you are on course 072 T° at 12.2 knots, when you sight a rock awash bearing 070°T at a range of 3.6 miles. If you change course at 1427, what course would you steer to leave the rock 1.0 mile abeam to port?
N a. 049° N b. 054° N c. 086° Y d. 091° 2860: Your vessel is on a course of 144°T at 16 knots. At 0126 a light bears 166.5°T, and at 0152 the light bears 189°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 0205, 4.1 miles Y b. 0210, 4.8 miles N c. 0215, 6.0 miles N d. 0220, 6.4 miles 2861: Your vessel is on a course of 196°T at 17 knots. At 0417 a light bears 218.5°T, and at 0442 the light bears 241°T. At what time and at what distance off will your vessel be when abeam of the light?
Y a. 0500, 5.0 miles N b. 0504, 6.2 miles N c. 0500, 6.2 miles N d. 0504, 5.0 miles 3063: The observed distance for a day's run was 302.7 miles. The propeller had a pitch of 20'06", and the average RPM was 67. What was the slip?
N a. +0.7% N b. -0.7% Y c. +7.0% N d. -7.0% 3452: You wish to make good a course of 035°T while turning for an engine speed of 12 knots. The set is 340°T, and the drift is 2 knots. What course should you steer?
N a. 027°T N b. 037°T Y c. 044°T N d. 054°T 3603: You are steering 318°psc. A northeasterly wind causes 3° of leeway. The variation is 14°E and the deviation table is extracted below. What will be the true course made good?
DEVIATION TABLE
MAG HDG DEV
300° 2°E
315° 0°
330° 2°W
N a. 301°T N b. 303°T N c. 327°T Y d. 329°T 10102: Your GPS position is LAT 37°07.5'N, LONG 75°39.1'W. What is the course per standard magnetic compass (psc) to a position 0.3 mile due north of North Chesapeake Entrance Buoy NCA (LL #375)?
N a. 222°psc N b. 228°psc N c. 231°psc Y d. 234°psc 11108: The passage between Great Gull Island and Plum Island __________.
N a. is subject to weak and variable tidal currents N b. uncovers at extreme low water Y c. should be avoided N d. shows a whirlpool at maximum ebb current when accompanied by NW gales 11502: At 1016 your GPS position is LAT 41°07.6'N, LONG 71°38.5'W. At 1104 your position is LAT 41°00.4'N, LONG 71°29.4'W. What was the speed made good between the two positions?
N a. 10.9 knots N b. 11.7 knots Y c. 12.5 knots N d. 13.6 knots 12201: Your vessel is steady on a heading of 203° per standard magnetic compass when you sight New Haven Light and New Haven Outer Channel Range Front Light in line over the stern. This information indicates that the __________.
N a. existing deviation table is correct for this heading N b. compass error is 17°W Y c. deviation table is in error for this heading N d. deviation is 1°E 13109: At 1113 you are in the entrance to Great Salt Pond on Block Island with buoy "5" close aboard. What is your ETA at light "1" at the mouth of the approaches to Lake Montauk if you make good 9.6 knots?
N a. 1310 Y b. 1301 N c. 1254 N d. 1249 13210: At 0943, your position is LAT 41°14.8'N, LONG 71°54.3'W. You are turning for 12.2 knots. What is your ETA at the entrance to Great Salt Pond on Block Island?
Y a. 1054 N b. 1048 N c. 1040 N d. 1032 13806: The chart symbol surrounding Saybrook Breakwater Light warns mariners that the navigational light structure is __________.
N a. no longer maintained Y b. protected by riprap N c. privately maintained N d. awash at high tide 15043: At 0811 your vessel's position is 37°04.9'N, 75°39.7'W. You are steering a course of 220° true at a speed of 14.0 knots. At what time would you expect the buoys in the northeasterly traffic scheme to line up, if you do not correct for a southwesterly current of 1.8 knots?
N a. 0826 N b. 0831 Y c. 0837 N d. 0846 15160: At 1815, your position is LAT 37°01.0'N, LONG 75°42.7'W. If there is no current, what is the course per standard magnetic compass to arrive at a point 0.3 mile due north of North Chesapeake Entrance Lighted Whistle Buoy "NCA"?
N a. 249.0°psc N b. 251.5°psc N c. 255.0°psc Y d. 257.0°psc 15461: At 0908, you change course to 010°T. What course should you steer per standard magnetic compass?
N a. 003° N b. 017° Y c. 021° N d. 359° 15621: What is the length of the trip?
N a. 899.6 miles N b. 878.9 miles Y c. 851.9 miles N d. 726.0 miles 15867: You anticipate a maximum flood current north of Stratford Shoal. You will be set in which general direction?
N a. Northerly N b. Easterly N c. Southerly Y d. Westerly 16007: If the visibility is 11 miles, what is the earliest time you can expect to see New Haven Light?
N a. The light is visible at 0352. N b. 0414 Y c. 0443 N d. You will not sight the light. 16008: While on a heading of 082°T, you sight Middle Ground Light in line with Old Field Point Light bearing 206° per standard magnetic compass. From this you can determine the __________.
N a. variation Y b. deviation table is correct for that heading N c. compass error is 17.5°E N d. deviation is 3.5°E for a bearing of 206° per standard magnetic compass 16145: At 2054 Block Island Southeast Point Light bears 054°T at 6.9 miles and Southwest Ledge Lighted Bell Buoy 2 is 1.6 miles off to port. The set and drift from 2027 to 2054 is __________.
Y a. 127°T at 3.1 knots N b. 127°T at 1.4 knots N c. 307°T at 3.1 knots N d. 307°T at 1.4 knots 16210: As you near Little Gull Island, you use your loran to insure that you do not come within 0.5 mile of the island. Which of the following loran readings will act as a danger line and keep you off Little Gull Island by a minimum of 0.5 mile?
Y a. Not less than 9960-Y-43953.5 N b. Not more than 9960-W-14735.9 N c. Not less than 9960-W-14735.8 N d. Not more than 9960-X-26149.0 16311: The broken magenta line which runs parallel to the shore between Roanoke Point and Mattituck Inlet marks a __________.
N a. pipeline Y b. fish trap area N c. demarcation line N d. cable area 16319: As you enter the New Haven Outer Channel, you sight the outer range markers in line directly ahead. Your heading at this time is 347°psc. What is your compass deviation by observation?
Y a. 0.5°East N b. 3.0°East N c. 3.5°West N d. 4.5°East 16338: At 2209 your position is latitude 40 47.7'N, longitude 71 35.5'W. There is a strong WSW'ly wind causing an estimated 3° leeway. What course will you steer by standard magnetic compass from your 2209 position to make good 340°T?
N a. 322° N b. 348° Y c. 356° N d. 002° 16442: The area bounded by the buoys "C51" to "C47A" to "M6" to "M14", west of your anchorage, is __________.
N a. a training area for naval small craft N b. restricted to oil and mineral exploration N c. an anchorage for ammunition barges Y d. a fish trap area 16841: At 0907 you change course to 224°T, and your speed is now 13.0 knots. At 0939 Chesapeake Light is bearing 168°T at a distance of 7.1 miles, and Cape Henry Light is bearing 246°T. What were the set and drift since 0907?
N a. 326°T at 0.7 knot N b. 326°T at 1.4 knots Y c. 146°T at 1.4 knots N d. 146°T at 0.7 knots