NAV3B Reviewer PDF

Question 1 Describe a scenario where dead reckoning would be the preferred method of navigation. Response: An approximate position based on available data Correct answer: An approximate position based on available data Score: 1 out of 1 Yes Question 2 Define dead reckoning in the context of mari...

Question 1 Describe a scenario where dead reckoning would be the preferred method of navigation. Response: An approximate position based on available data Correct answer: An approximate position based on available data Score: 1 out of 1 Yes Question 2 Define dead reckoning in the context of maritime navigation. Response: Estimating position based on previous positions Correct answer: Estimating position based on previous positions Score: 1 out of 1 Yes Question 3 What is the significance of an Automatic Identification System (AIS) in maritime navigation? Response: To provide real-time ship information Correct answer: To provide real-time ship information Score: 1 out of 1 Yes Question 4 How can weather conditions influence set and drift? Response: They can change the direction and speed of currents Correct answer: They can change the direction and speed of currents Score: 1 out of 1 Yes Question 5 In what situations is a running fix particularly useful? Response: Near the coastline with visible landmarks Correct answer: Near the coastline with visible landmarks Score: 1 out of 1 Yes Question 6 Describe the function of a radar in navigation Response: To locate other vessels and obstacles Correct answer: To locate other vessels and obstacles Score: 1 out of 1 Yes Question 7 What is the primary purpose of rising and dipping lights in marine navigation? Response: To calculate the distance to the horizon Correct answer: To establish the position of the ship Score: 0 out of 1 No Question 8 Scenario You are sailing along the coast and take a bearing to a lighthouse at 10:00 AM, which reads 045°. At 10:30 AM, you take another bearing to the same lighthouse, which reads 060°. Your speed is 8 knots. What is your running fix position at 10:30 AM? Response: Intersection of the two bearings at 10:30 AM Correct answer: Intersection of the two bearings at 10:30 AM Score: 1 out of 1 Yes Question 9 If a landmark is sighted at 45 degrees off the bow and then at 90 degrees off the beam, what does the distance traveled between these sightings represent? Response: The distance to the landmark Correct answer: The distance off the landmark Score: 0 out of 1 No Question 10 How do buoys assist in determining a ship's position? Response: By marking safe water areas Correct answer: By marking safe water areas Score: 1 out of 1 Yes Question 11 You are steering a course of 270° at a speed of 12 knots. After one hour, your observed position is 3 nautical miles north of your expected track. What is the set and drift affecting your vessel? Response: Set 000°, Drift 3 knots Correct answer: Set 000°, Drift 3 knots Score: 1 out of 1 Yes Question 12 What is an estimated position (EP) in navigation? Response: An approximate position based on available data Correct answer: An approximate position based on available data Score: 1 out of 1 Yes Question 13 A vessel is traveling on a course of 045° at 15 knots for 2 hours. The current is setting the vessel 3 nautical miles to the north in that time. What is the vessel's Estimated Position (EP) after 2 hours? Response: 30 nautical miles at a bearing of 045° from the starting point Correct answer: 30 nautical miles at a bearing of 060° from the starting point Score: 0 out of 1 No Question 14 Which of the following actions would best help a navigator counter the effect of set and drift on a vessel's course? Response: Adjusting the course to compensate for the set and drift Correct answer: Adjusting the course to compensate for the set and drift Score: 1 out of 1 Yes Question 15 accurately fixed. Using dead reckoning, what will be your DR Position at 10:00 if no external forces (like current or wind) affect the vessel? Response: 24 nautical miles south of your last fix Correct answer: 24 nautical miles south of your last fix Score: 1 out of 1 Yes Question 16 You are using the bow and beam bearing method with a navigational aid on the shoreline. After taking two bearings, how would you calculate the distance from the object to determine your position? Response: Use a time, speed, and distance formula based on the time between the two bearings. Correct answer: Use a time, speed, and distance formula based on the time between the two bearings. Score: 1 out of 1 Yes Question 17 If a ship is heading due south but experiences a set to the west and drift at 3 knots, what will happen to the ship\'s actual position? Response: The ship will move westward while continuing to move south. Correct answer: The ship will move westward while continuing to move south. Score: 1 out of 1 Yes Question 18 Response: A fix obtained by taking bearings at different times Correct answer: A fix obtained by taking bearings at different times Score: 1 out of 1 Yes Question 19 Response: To warn ships of dangerous areas Correct answer: To warn ships of dangerous areas Score: 1 out of 1 Yes Question 20 You are navigating a vessel on a course of 120° at a speed of 12 knots. After one hour, you find that you are 1 nautical mile south and 2 nautical miles east of your expected position. What is the set and drift? Response: Set 135°, Drift 2 knots Correct answer: Set 135°, Drift 2 knots Score: 1 out of 1 Yes Question 21 Which of the following factors is NOT considered when calculating the geographical range of a light? Response: Speed of the vessel Correct answer: Speed of the vessel Score: 1 out of 1 Yes Question 22 Response: Set is the direction of current, drift is the speed Correct answer: Set is the direction of the ship, drift is the speed of ship Score: 0 out of 1 No Question 23 48\. Which of the following are a common method for determining a ship's position? Response: Cross bearings Response: Transit bearings Response: Ranges Correct answer: Cross bearings , Transit bearings , Ranges Score: 1 out of 1 Yes Question 24 What are the limitations of dead reckoning? Response: It does not account for external factors Correct answer: It does not account for external factors Score: 1 out of 1 Yes Question 25 How can dead reckoning be used in conjunction with other navigation methods? Response: By combining it with GPS and radar Correct answer: By combining it with GPS and radar Score: 1 out of 1 Yes Question 26 Which of the following is a key step in the bow and beam bearing method? Response: Measuring the time taken to travel between bearings Correct answer: Measuring the time taken to travel between bearings Score: 1 out of 1 Yes Question 27 What are the essential elements required for dead reckoning? Response: Speed, time, and course Correct answer: Speed, time, and course Score: 1 out of 1 Yes Question 28 What information can be obtained from a nautical chart? Response: Depth of water and hazards Correct answer: Depth of water and hazards Score: 1 out of 1 Yes Question 29 When using the bow and beam bearing method, what angle is typically used to take the initial bearing off the bow? Response: 45 degrees relative to ships present heading to the object Correct answer: 45 degrees relative to ships present heading to the object Score: 1 out of 1 Yes Question 30 Scenario While crossing an open sea, you notice that your ship is being affected by a southerly drift of 1.5 knots. Your intended course is 270° at a speed of 12 knots. After 2 hours, you need to determine your position. What is your estimated position after 2 hours? Response: 24 nautical miles west, 3 nautical miles south Correct answer: 24 nautical miles west, 3 nautical miles south Score: 1 out of 1 Yes Question 31 What assumption must be made about the ship's movement when using the bow and beam bearing method? Response: The ship's course and speed remain constant between the two bearings. Correct answer: The ship's course and speed remain constant between the two bearings. Score: 1 out of 1 Yes Question 32 If the height of the observer's eye is 10 meters and the height of the light is 50 meters, what is the approximate geographical range of the light? Response: 20.8 nautical miles Correct answer: 20.8 nautical miles Score: 1 out of 1 Yes Question 33 Response: It shows the area of uncertainty in the ship's position Correct answer: It indicates the exact position of the ship Score: 0 out of 1 No Question 34 Explain the role of a GPS in modern navigation. Response: To provide real-time location data Correct answer: To provide real-time location data Score: 1 out of 1 Yes Question 35 Which of the following is a limitation of relying solely on GPS for navigation Response: It may experience signal interference or equipment failure. Correct answer: It may experience signal interference or equipment failure. Score: 1 out of 1 Yes Question 36 In which situation would a navigator most likely use the dead reckoning method Response: When GPS systems fail or are unavailable Correct answer: When GPS systems fail or are unavailable Score: 1 out of 1 Yes Question 37 If the height of the observer's eye is 5 meters and the height of the light is 25 meters, what is the approximate geographical range of the light? Response: 15.6 nautical miles Correct answer: 15.6 nautical miles Score: 1 out of 1 Yes Question 38 Response: They can significantly alter the position Correct answer: They can significantly alter the position Score: 1 out of 1 Yes Question 39 Which formula is used to calculate the geographical range of a light in meters? Response: Range=2.08 √h+2.08 √H Correct answer: Range=2.08 √h+2.08 √H Score: 1 out of 1 Yes Question 40 What is the term used to describe the maximum distance at which a light can be seen under present visibility conditions? Response: Luminous Range Correct answer: Luminous Range Score: 1 out of 1 Yes Question 41 How can you correct for set and drift when plotting a course? Response: By adjusting the course based on their effects Correct answer: By adjusting the course based on their effects Score: 1 out of 1 Yes Question 42 Response: By providing a line of sight for safe passage Correct answer: By providing a line of sight for safe passage Score: 1 out of 1 Yes Question 43 When plotting a position using ranges, what is the primary tool used to measure the distance from a known point? Response: Dividers or compasses Correct answer: Dividers or compasses Score: 1 out of 1 Yes Question 44 How do you calculate the set and drift affecting a ship's course? Response: By observing the movement of water Correct answer: By using GPS coordinates Score: 0 out of 1 No Question 45 What is a major limitation of dead reckoning when used for long periods without updating the position? Response: It does not account for drift caused by wind or current, leading to errors over time. Correct answer: It does not account for drift caused by wind or current, leading to errors over time. Score: 1 out of 1 Yes Question 46 What are the advantages of using a running fix? Response: It provides a more reliable position over time Correct answer: It provides a more reliable position over time Score: 1 out of 1 Yes Question 47 At 14:00, you take a bearing of a landmark at 045°. At 14:30, you take a second bearing of the same landmark at 060°. During this time, your vessel has been traveling at 10 knots on a course of 090°. What is your vessel's Running Fix at 14:30? Response: 5 nautical miles east of the landmark Correct answer: 5 nautical miles east of the landmark Score: 1 out of 1 Yes Question 48 How can a running fix improve the accuracy of a ship's position? Response: By providing multiple data points over time Correct answer: By providing multiple data points over time Score: 1 out of 1 Yes Question 49 When a light is first sighted by a ship as it approaches, it is said to be: Response: Rising Correct answer: Rising Score: 1 out of 1 Yes Question 50 What is the primary purpose of the bow and beam bearing method in marine navigation? Response: To establish the ship's position Correct answer: To establish the ship's position Score: 1 out of 1