USCG Navigation Problems: Master's License

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.


100: Which of the following statements concerning the buoys on the Mississippi River is TRUE?


111: As you pass Solitude Lt. (mile 249.0 AHP) which dayboard would you see?


217: Your 1600 position is LAT 37°22.5'N, LONG 75°32.3'W. The depth of water under the keel is about __________.


278: The National Weather Service provides 24 hour weather broadcasts to vessels transiting the Chesapeake Bay Bridge Tunnel area on which frequency?

    Y a. 162.55 MHz
    N b. 162.85 MHz
    N c. 181.15 MHz
    N d. 202.35 MHz

330: Which chart could you use for greater detail of the area at the south end of York Spit Channel?

    N a. 12254
    N b. 12226
    N c. 12224
    Y d. 12222

375: 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?

    N a. Not less than 9960-W-14735.8
    N b. Not more than 9960-W-14735.9
    Y c. Not less than 9960-Y-43953.5
    N d. Not more than 9960-X-26149.0

376: You depart LAT 40°42.0'N, LONG 74°01.0'W, and steam 3365.6 miles on course 118°T. What is the longitude of your arrival by Mercator sailing?

    N a. 24°29.0'W
    N b. 22°58.0'W
    Y c. 17°41.0'W
    N d. 10°46.0'W

501: You depart from the position in the previous question at 2114 and make good 12 knots on a course of 040°T. At what time will you sight New Haven Light if the visibility is 11 miles?

    N a. The light is visible at 2114.
    N b. 2152
    Y c. 2159
    N d. 2206

508: Branford Reef is __________.

    N a. a hard sand shoal marked with a light
    Y b. completely submerged at all stages of the tide
    N c. surrounded by rocks awash at low water spring tides
    N d. a small, low, sandy islet surrounded by shoal water

1094: On 12 Oct. , your vessel is on course 081°T, speed 20 knots. Your 1800 zone time DR position is LAT 26°11.0'S, LONG 77°18.0'E. You observed 3 celestial bodies. Determine the latitude and longitude of your 1835 running fix. NP-0024

    N a. LAT 26°05.5'S, LONG 77°14.5'E
    N b. LAT 26°07.5'S, LONG 77°34.0'E
    N c. LAT 26°09.0'S, LONG 77°27.5'E
    Y d. LAT 26°12.0'S, LONG 77°31.0'E

1096: On 24 October , your 0100 DR position is LAT 27°42'N, LONG 158°35'E. You are on course 085°T at a speed of 12 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0700 running fix. NP-0026

    N a. LAT 27°48.8'N, LONG 160°12.5'E
    N b. LAT 27°52.5'N, LONG 160°18.2'E
    Y c. LAT 27°56.0'N, LONG 159°47.3'E
    N d. LAT 27°58.4'N, LONG 159°43.5'E

1146: The Linwood Bend revetment on the LMR extends from mile __________.

    N a. 828.1-823.1 RDB
    N b. 831.7-829.4 RDB
    N c. 845.4-842.5 LDB
    Y d. 841.3-838.7 LDB

1417: What is the distance from Baton Rouge, LA, to Hickman, KY, on the Mississippi River System?

    N a. 117 miles
    N b. 433 miles
    N c. 656 miles
    Y d. 692 miles

1495: On 9 September , your 2043 ZT position is LAT 24°18'N, LONG 66°46'W. You observe Polaris bearing 001°pgc. At the time of the observation the helmsman noted that he was heading 031°pgc and 040°psc. The variation is 11°W. What is the deviation for that heading?

    N a. 0°
    N b. 1°W
    N c. 3°W
    Y d. 2°E

1540: You estimate the current at 2.0 mph. What is the speed over the ground?

    N a. 9.5 mph
    Y b. 5.5 mph
    N c. 5.0 mph
    N d. 4.5 mph

1660: On 23 June , in DR position LAT 21°39.0'S, LONG 106°28.0'W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 078°psc. The chronometer reads 02h 14m 39s and is 01m 43s slow. Variation in the area is 9°W. What is the deviation of the standard magnetic compass?

    N a. 2.8°E
    N b. 3.9°W
    Y c. 4.3°W
    N d. 4.6°E

1666: On 23 October , your vessel's 1722 zone time DR position is LAT 27°36'S, LONG 96°16'W, when an amplitude of the Sun is observed. The Sun's lower limb is about 20 minutes of arc above the visible horizon and bears 246° per standard compass. Variation in the area is 14.0°E. The chronometer reads 11h 24m 19s and is 01m 43s fast. What is the deviation of the standard compass?

    N a. 2.3°E
    N b. 2.7°E
    N c. 2.7°W
    Y d. 3.1°W

1684: You are passing Putney Lt. (mile 943.6 AHP). The gray shaded areas alongside the river represent __________.

    N a. levees
    N b. weirs
    N c. dikes
    Y d. revetments

1688: As you approach Ashland Light (mile 378.1 AHP), which type of daymark would you see on the light structure?

    N a. Green square
    N b. Green triangle
    N c. Red diamond
    Y d. Red triangle

1838: What is the distance from Baton Rouge, LA, to St. Louis, MO, on the Mississippi River System?

    N a. 1038 miles
    Y b. 916 miles
    N c. 690 miles
    N d. 352 miles

1894: On 22 July , your 0442 DR position is LAT 26°35.6'N, LONG 22°16.7'W. You observe an unidentified star bearing 149°T at an observed altitude (Ho) of 12°55.0'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?

    N a. Hamal
    N b. Rigel
    N c. Menkar
    Y d. Acamar

2092: At your current speed of 23 knots you only have enough fuel remaining to travel 386 miles. You must travel 785 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?

    N a. 19.3
    N b. 17.7
    Y c. 16.1
    N d. 14.5

2125: From your 0410 fix, what is the course per standard magnetic compass to enter York Spit Channel with buoy "29"
close abeam to starboard?

    N a. 172°psc
    N b. 176°psc
    Y c. 198°psc
    N d. 202°psc

2159: On 25 May , your vessel's 1858 zone time position is LAT 21°05.0'N, LONG 143°27.0'E. At that time a sextant observation of the planet Venus was made. The sextant altitude is 12°53.4' and the chronometer reads 08h 59m 15s. The index error is 4.5' off the arc, and the chronometer error is 01m 25s fast. Your height of eye is determined to be 55.0 feet. What is the azimuth (Zn) of the sight using the assumed position?

    N a. 069.6°T
    N b. 110.4°T
    N c. 249.6°T
    Y d. 290.4°T

2217: The highest point on your towboat is 67 feet above the water, and the Helena Gage reads +22.3 feet. What is the vertical clearance when you pass under the A-span of the Helena Highway Bridge?

    N a. 74.7 feet
    N b. 52.4 feet
    N c. 49.8 feet
    Y d. 30.1 feet

2244: At 1435 ZT, on 27 April , in DR position LAT 51° 56.8' N, LONG 150° 37.7' E, the Moon’s upper limb is observed on the visible horizon, bearing 242.2° psc. Variation is 2° W. What is the deviation?

    Y a. 2.2°W
    N b. 2.2°E
    N c. 6.2°E
    N d. 6.2°W

2651: You are steering 246°T, and a light is picked up dead ahead at a distance of 14 miles at 1037. You change course to pass the light 2.5 miles off abeam to port. If you are making 12 knots, what is your ETA at the position 2.5 miles off the light?

    N a. 1143
    Y b. 1146
    N c. 1149
    N d. 1152

2672: While on a course of 283°pgc, a light bears 10° on the port bow at a distance of 8.3 miles. What course should you steer to pass 3.5 miles abeam of the light leaving it to port?

    N a. 289°pgc
    N b. 294°pgc
    Y c. 298°pgc
    N d. 302°pgc

2717: The Natchez Gage reads 16.3 feet. The high point on your towboat is 38 feet above water. What is the vertical clearance when you pass under the Natchez Highway Bridge?

    N a. 79.0 feet
    Y b. 71.7 feet
    N c. 65.2 feet
    N d. 59.1 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

3051: The propeller on a vessel has a diameter of 20.6 feet and a pitch of 23.4 feet. What would be the apparent slip if the vessel cruised 538 miles in a 24 hour day (observed distance) at an average RPM of 87?

    Y a. -11.6%
    N b. +11.6%
    N c. -10.3%
    N d. +10.3%

3301: You have steamed 217 miles and consumed 23.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 362 miles?

    N a. 33.8 tons
    Y b. 38.4 tons
    N c. 42.6 tons
    N d. 45.7 tons

3301: You have steamed 217 miles and consumed 23.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 362 miles?

    N a. 33.8 tons
    Y b. 38.4 tons
    N c. 42.6 tons
    N d. 45.7 tons

10309: You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to LAT 41°00.0'N, LONG 71°30.0'W?

    N a. 108°psc
    Y b. 122°psc
    N c. 124°psc
    N d. 130°psc

10507: At 0919 your position is LAT 37°00.0'N, LONG 75°30.0'W. You are on course 270°T at 10.5 knots. At 1020 your position is LAT 36°59.5'N, LONG 75°44.9'W. What was the current?

    N a. 026° at 0.7 knot
    N b. 046° at 1.0 knot
    N c. 226° at 0.8 knot
    Y d. 246° at 1.4 knots

14001: At 1745 Lady Island Range is in line dead ahead and Government Island Upper Range is in line on your starboard bow. Your vessel is steaming in a westerly direction. At 1851 you pass under the Interstate 5 highway bridge. What speed have you averaged?

    N a. 10 mph
    Y b. 11 mph
    N c. 12 mph
    N d. 13 mph

14204: The mooring float at Beacon Rock State Park is restricted to pleasure boats and to periods not to exceed __________.

    N a. 12 hours
    N b. 24 hours
    Y c. 36 hours
    N d. 48 hours

14501: You are proceeding in an easterly direction on the Columbia River. The pool level of the Bonneville Reservoir stands at 65 feet above MSL. If the highest point on your vessel is 54 feet above the water, what will be the vertical clearance as you pass under the overhead power cables at mile 186.2?

    N a. 94 feet
    N b. 101 feet
    Y c. 108 feet
    N d. 117 feet

15011: Assume set and drift have no effect on your vessel. If you change course to 187°pgc from your 1950 position, how close will you pass Cape Charles Lighted Bell Buoy "14"?

    N a. 0.1 mile
    N b. 0.5 mile
    Y c. 1.1 mile
    N d. 1.7 miles

15044: At 0841 Chesapeake Light bears 164° true, Cape Charles Light bears 312° true, and Cape Henry Light bears 247°
true. What was your course made good since 0811?

    Y a. 226°true
    N b. 230°true
    N c. 233° true
    N d. 237°true

15438: At 2038 you are on course 272°T when Chesapeake Light is bearing 348° true at a range of 5.3 nm

Based on this fix, which statement is TRUE?

    Y a. You are inside a ten fathom depth curve.
    N b. You are less than five miles from Chesapeake Light.
    N c. You are 0.6 mile north of a wreck.
    N d. You are inside the contiguous zone.

15741: At 2050 Montauk Point Light is bearing 337° true at a range of 8 nm, From this position, you change course in order to pass 1 mile due east of Montauk Point Lighted Whistle Buoy "MP". If there are no set and drift, what course must you steer?

    Y a. 024°T
    N b. 028°T
    N c. 032°T
    N d. 036°T

15843: You continue to steer 195°T. You pass Cape Charles Lighted Bell Buoy "14", 0.9 miles abeam to starboard at 2111. Your speed made good from 2045 to 2111 is __________.

    N a. 13.7 knots
    N b. 14.1 knots
    N c. 14.5 knots
    Y d. 14.8 knots

16016: At 0430, you change course and speed to make good 090°T at 10 knots. At 0433, you slow due to an engineering casualty and estimate you are making good 5.5 knots. At what time will Branford Reef Light bear 000°T?

    N a. 0601
    Y b. 0609
    N c. 0620
    N d. 0624

16059: At 1800, Tue Marshes Light bears 270°pgc, and York Spit Swash Channel Light "3" bears 007°pgc. Your position is __________.

    N a. LAT 37°14.0'N, LONG 76°19.8'W
    N b. LAT 37°14.2'N, LONG 76°20.3'W
    Y c. LAT 37°14.2'N, LONG 76°20.1'W
    N d. LAT 37°14.5'N, LONG 76°20.0'W

16345: Where will you cross the demarcation line between the International and Inland Rules of the Road?

    N a. Between Montauk Point and Block Island
    Y b. In the Race
    N c. At the mouth of Bridgeport Harbor
    N d. Between Plum Gut and Niantic Bay

16462: Which statement about your 0400 position is TRUE?

    Y a. You are within the territorial sea and contiguous zone.
    N b. You are governed by the Inland Rules of the Road.
    N c. The ocean floor is composed of shale.
    N d. Anchoring, trawling and fishing are prohibited.