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.
98: At 0230 on 13 August, you are at mile 610.5 AHP when you see about a mile ahead lights on the water near the left bank. What might you see when you come abreast of these lights?
N a. Privately maintained buoys at a yacht club N b. Government buoys marking the Hurricane Point dikes Y c. Barges moored at the Dennis Landing Terminal N d. A pipeline discharging dredge spoil 115: After passing Wilkinson Lt. (mile 310.0 AHP) you see a flashing amber light on the right descending bank ahead. The flashing light indicates that you should __________.
N a. stay in the deepest water N b. slow down due to dredging operations N c. keep as close to the right descending bank as safety permits Y d. keep as close to the left descending bank as safety permits 120: You estimate the current as 2.5 mph. What is the speed over the ground?
N a. 5.5 mph Y b. 6.0 mph N c. 8.0 mph N d. 11.0 mph 194: At 2100, you alter course to 250°T and reduce speed to 7 knots. You enter the traffic separation scheme on the inbound side. At 2200, your fix shows you crossing a broken purple line on the chart, and you observe North Chesapeake Entrance Lighted Gong Buoy "NCD" to port. This area is __________.
N a. an area with local magnetic disturbances N b. a pilotage area Y c. a precautionary area centered on buoy "CBJ" N d. in inland waters 448: At 2100, you set course of 000°T, speed 10 knots from LAT 41°07.0'N, LONG 71°30.0'W. Visibility is 5.5 n.m. What is the earliest time you can expect to sight Point Judith Light? (Use charted range of 20 miles as nominal range.)
N a. The light is visible at 2100. N b. 2106 Y c. 2111 N d. 2123 459: Determine the great circle distance and initial course from LAT 25°47.0'N, LONG 79°59.5'W to LAT 38°42.0'N, LONG 09°10.5'W.
N a. 3341.0 miles, 063°T N b. 3347.0 miles, 063°T N c. 3427.8 miles, 061°T Y d. 3588.6 miles, 059°T 540: Determine the distance from LAT 34°18'S, LONG 172°40'E to LAT 34°18'S, LONG 152°38'E, by parallel sailing.
Y a. 993.0 miles N b. 995.2 miles N c. 996.4 miles N d. 998.6 miles 559: At 0615, Stratford Point Light bears 292°pgc, Falkner Island Light bears 052°pgc, and Branford Reef Light bears 018°pgc. What was the current since 0530?
N a. 083° at 0.9 knots Y b. 083° at 1.2 knots N c. 263° at 1.2 knots N d. 263° at 0.9 knots 569: At 0823, Old Point Comfort Light bears 000°T at 0.6 mile. What is your 0823 position?
N a. LAT 36°59.8'N, LONG 76°18.0'W Y b. LAT 36°59.5'N, LONG 76°18.4'W N c. LAT 36°59.0'N, LONG 76°19.6'W N d. LAT 36°55.5'N, LONG 76°18.6'W 601: At 1210 zone time, on 1 December , you depart Seattle, LAT 47°36.0'N, LONG 122°22.0'W (ZD +8). You are bound for Guam, LAT 13°27.0'N, LONG 144°37.0'E, and you estimate your speed of advance at 20 knots. The distance is 4,948 miles. What is your estimated zone time of arrival at Guam?
N a. 1734, 11 December N b. 1934, 11 December N c. 0334, 12 December Y d. 1334, 12 December 737: On 29 July , your 1930 zone time DR position is LONG 164°26.0'E. At that time you observe Polaris with a sextant altitude (hs) of 23°46.8'. The chronometer time of the sight is 08h 32m 18s, and the chronometer error is 02m 26s fast. The index error is 2.7' on the arc, and the height of eye is 56.0 feet. What is your latitude by Polaris?
N a. 24°01.9'N Y b. 24°19.5'N N c. 24°31.7'N N d. 25°19.6'N 832: On 19 November , in DR position LAT 20°03.5'N, LONG 129°48.0'W, you take an ex-meridian observation of the planet Venus at upper transit. The chronometer time of the sight is 11h 29m 44s, and the chronometer error is 01m 23s slow. The sextant altitude (hs) is 43°54.3'. The index error is 2.0' off the arc, and your height of eye is 48 feet. What is the latitude at meridian transit?
N a. 20°08.2'N Y b. 19°58.0'N N c. 19°53.2'N N d. 19°50.6'N 977: On 8 February , your 0800 zone time (ZT) position was LAT 28°55.0'S, LONG 52°27.0'W. Your vessel was steaming on course 036°T at a speed of 19.0 knots. An observation of the Sun's lower limb was made at 0938 ZT. The chronometer read 12h 37m 23s and was slow 01m 24s. The observed altitude (Ho) was 45°29.2'. Local Apparent Noon (LAN) occurred at 1240 ZT. The observed altitude (Ho) was 77°10.5'. What was the longitude of your 1200 ZT running fix?
N a. 51°29.6'W N b. 51°31.4'W N c. 51°33.1'W Y d. 51°35.4'W 981: On 20 September , your 0730 zone time position was LAT 28°58.0'N, LONG 152°26.0'W. Your vessel was steaming on course 225°T at a speed of 19.0 knots. An observation of the Sun's lower limb was made at 0931 ZT. The chronometer read 07h 29m 20s and was slow 02m 22s. The observed altitude (Ho) was 44°14.4'. LAN occurred at 1206 zone time. The observed altitude (Ho) was 62°49.5'. What was the longitude of your 1200 zone time running fix?
N a. LONG 153°32.5'W N b. LONG 153°27.2'W Y c. LONG 153°23.5'W N d. LONG 153°20.0'W 1188: On 9 February , your 0830 zone time DR position is LAT 22°19.0'N, LONG 64°37.0'E. Your vessel is on course 128°
T at a speed of 19.0 knots. What is the zone time of local apparent noon (LAN)?
Y a. 1152 N b. 1156 N c. 1201 N d. 1205 1201: On 10 October , your 0930 zone time position is LAT 25°00.0'S, LONG 164°38.6'W. Your vessel is on course 180°T at a speed to 10.0 knots. What is the zone time of local apparent noon (LAN)?
Y a. 1145 N b. 1151 N c. 1203 N d. 1206 1259: On 10 April , your 1630 ZT DR position is LAT 21°03.0'N, LONG 63°11.0'W. You are on course 324°T at a speed of 22 knots. What will be the zone time of sunset at your vessel?
N a. 1805 N b. 1814 N c. 1818 Y d. 1833 1651: On 23 October , in DR position LAT 21°13.0'N, LONG 152°18.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 259°psc. The chronometer reads 07h 21m 46s and is 01m 32s slow. Variation in the area is 5°E. What is the deviation of the magnetic compass?
N a. 0.9°E N b. 1.5°W Y c. 5.9°W N d. 6.5°E 1685: As you approach Buckridge Light (mile 412.5 AHP), which type of daymark would you see on the light structure?
N a. Red square N b. Green square N c. Red diamond Y d. Green diamond 1725: As you pass Fort Adams (311.4 AHP) you observe a flashing amber light on the right descending bank ahead. This indicates that you should __________.
N a. proceed with caution as there is construction work being done on the revetment N b. keep as close to the right descending bank as safety permits Y c. keep as close to the left descending bank as safety permits N d. proceed with caution as the river is congested around the bend 1745: What is the distance in river miles, from the mouth of the Yazoo Diversion Canal to the RR and Hwy bridge at Baton Rouge, LA?
N a. 365 miles N b. 310 miles N c. 265 miles Y d. 203 miles 1889: On 22 July , your 1759 DR position is LAT 24°50.2'S, LONG 05°16.0'E. You observe an unidentified star bearing 293°T at an observed altitude (Ho) of 17°52.8'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe?
Y a. Regulus N b. Antares N c. Miaplacidus N d. Suhail 1912: On 22 February , your 1857 DR position is LAT 23°46.0'S, LONG 93°16.5'E. You observe an unidentified star bearing 108°T at an observed altitude (Ho) of 67°53.9'. The chronometer reads 01h 00m 35s, and is 03m 25s fast. What star did you observe?
Y a. Adhara N b. Miaplacidus N c. Avior N d. Suhail 2154: On 30 June , at 0630 zone time, morning stars were observed, and the vessel's position was determined to be LAT 25°15.0'S, LONG 175°36.0'E. Your vessel is steaming at 16.0 knots on a course of 302°T. A sextant observation of the Sun's lower limb is made at 1015 zone time. The chronometer reads 10h 14m 38s, and the sextant altitude is 32°07.9'. The index error is 4.5' on the arc, and the chronometer error is 01m 25s slow. Your height of eye on the bridge is 58.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
Y a. 035.3°T N b. 144.7°T N c. 186.5°T N d. 248.5°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 2327: After you enter Thimble Shoal Channel, you will alter course to pass between Trestle "A" and "B". Based upon your present position, passing buoy "12" to port, what is TRUE?
N a. You are required to proceed outbound in the North Auxiliary Channel to avoid ferry traffic N b. You may proceed outbound in Thimble Shoal Channel Y c. You should cross the main channel and proceed outbound in the South Auxiliary Channel N d. Water depth is 38 feet. 2457: You have steamed 369 miles at 16 knots and burning 326 barrels of fuel per day. You must decrease your consumption to 212 barrels per day with 271 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?
N a. 11.1 N b. 12.9 N c. 13.6 Y d. 15.1 2689: You are steering 107°T, and a light is picked up dead ahead at a distance of 11 miles at 0847. You change course to leave the light 3 miles off to starboard. If you are making 15.5 knots, what is your ETA at the position 3 miles off the light?
Y a. 0928 N b. 0931 N c. 0934 N d. 0937 2777: The Helena Gage reads 2.3 feet. The high point on your towboat is 26 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?
N a. 76.0 feet N b. 84.2 feet N c. 89.5 feet Y d. 90.7 feet 2878: Your vessel is steering 143°T at 16 knots. At 2147 a light bears 106°T, and at 2206 the same light bears 078°T. What will be your distance off abeam?
N a. 5.1 miles N b. 5.4 miles Y c. 5.9 miles N d. 6.5 miles 3050: The propeller on a vessel has a diameter of 23.7 feet and a pitch of 24.8 feet. What would be the apparent slip if the vessel cruised 442 miles in a 23 hour day (observed distance) at an average RPM of 89?
N a. -7.6% N b. +7.6% N c. -11.8% Y d. +11.8% 3084: If the speed necessary for reaching port at a designated time is 18.6 knots, and the pitch of the propeller is 26.2 feet, how many revolutions per minute will the shaft have to turn, assuming a 4% negative slip?
Y a. 69 N b. 72 N c. 75 N d. 78 3106: You are turning 85 RPM, with a propeller pitch of 19 feet, and an estimated slip of +3%. What is the speed of advance?
N a. 14.7 knots Y b. 15.5 knots N c. 16.4 knots N d. 17.1 knots 3289: While steaming at 17.0 knots, your vessel consumes 382 barrels of fuel oil per day. In order to reduce consumption to 223 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?
N a. 9.9 knots N b. 11.8 knots N c. 13.0 knots Y d. 14.2 knots 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 3619: Your vessel is steering course 149°psc, variation for the area is 13°E, and deviation is 4°E. The wind is from the northeast, producing a 4° leeway. What true course are you making good?
N a. 128°T N b. 136°T N c. 162°T Y d. 170°T 3761: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 283°
T, and the variation is 13°E. If the heading of your vessel at the time of the sighting is 278° per standard compass, what is the deviation?
N a. 5°E N b. 5°W N c. 8°E Y d. 8°W 10903: What is the distance from Norfolk to Philadelphia for a deep draft vessel via the Chesapeake Bay and C and D Canal ?
N a. 209 miles Y b. 245 miles N c. 286 miles N d. 302 miles 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 12300: You are on course 244° per standard magnetic compass when you sight Block Island Southeast Point Light in line with Block Island Aero Beacon bearing 326° per standard magnetic compass. Based on this you __________.
N a. should swing your vessel to check the deviation table N b. know the compass error is 12°W N c. should suspect that there is a local magnetic disturbance Y d. should apply 3°W deviation to any bearing (psc) while on a heading of 244°psc 13303: You are considering anchoring approximately three miles northeast of Chesapeake Light. After examining the chart you decide not to because of the __________.
N a. large number of wrecks N b. coral being designated as a special protected area Y c. danger of unexploded mines N d. area being designated as a National Marine Sanctuary 13309: What type of bottom can be expected at the northern end of York Spit Channel?
N a. Hard clay N b. Fine gray sand N c. Soft black mud Y d. Mud and sand 15646: At 2229 the gyro fails. What is the course to steer per standard magnetic compass to make good 206°T, if you allow 3° leeway for southeasterly winds?
N a. 187° N b. 191° Y c. 217° N d. 220° 15707: At 0725, you are heading 054°T, and Stratford Point Light is abeam to port at 3.1 miles. The current is 135°T at 1.8 knots. If you make turns for an engine speed of 8 knots, which course must you steer to make good 048°T?
Y a. 035°T N b. 042°T N c. 047°T N d. 055°T 16407: At 0227, you are on course 087°T at 10 knots. What course per standard magnetic compass should you steer to make good your true course?
N a. 099°psc N b. 102°psc Y c. 105°psc N d. 109°psc 16710: In clear weather, how far away will you sight Point Judith Light? (use charted range of 20 miles as nominal range)
N a. 9.2 nm N b. 10.6 nm N c. 12.3 nm Y d. 14.0 nm