Navigation, Seamanship, and Shiphandling (NSS) – Officer of the Deck (OOD) Phase 2 Practice Exam

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• Which statement correctly defines set and drift in navigation?
• Why are civil and nautical twilight important to mariners?
• What term describes the actual distance a light can be seen given light height, geometry, and meteorological conditions?
• In the Semicircle Test, if the bay is smaller than the corresponding semicircle, what can be done?
• Which of the following is a sign of continuing fair weather?
• Which instrument measures wind speed and wind direction?
• Why is Mean High Water used for clearance calculations?
• What are the 2 portions of propeller current?
• An OTSR advisory is issued when which condition is met?
• EP also applies to DR position when which condition exists?
• Which INS alignment is used to get underway in less than 4 hours?
• Which statement describes a Hydraulic Tidal Current?
• Within 3-12 NM, which waste is allowed to be discharged?
• Which ships are more susceptible to currents?
• Which pairing correctly relates the inshore and offshore current types?
• What is the Ebb Current?
• Which statement best describes the Flood Current?
• Which current is described as inside the surf zone and flowing toward the beach?
• In the mnemonic, what term stands for Variation?
• Which duration is associated with Schuler Oscillation?
• What is the visible horizon?
• Which statement about chart scales is true?
• Which symbol corresponds to an Electronic Fix?
• What does FOM tell you?
• Which term describes navigational rights in international waters?
• If the GPS-INS difference is less than the threshold, what happens?
• What is the purpose of plotting a line of position (LOP)?
• In the mnemonic, what term corresponds to Magnetic Heading?
• Who is the primary tide-generating body?
• Which feature is entitled to the Exclusive Economic Zone (EEZ) rights?
• To determine the time zone offset from longitude, which operation is used?
• Which statement describes a high-pressure (anticyclone) system?
• What is magnetic compass deviation?
• In the mnemonic, what term corresponds to Compass?
• What does the Lateral Buoyage System indicate?
• Which of the following describes an Isolated Danger Buoy in terms of color and topmark?
• Region A includes which area?
• Which two main types of ocean currents are identified?
• Summer Solstice Declination
• Civil Twilight is best described as:
• Which statement is accurate about Transit Passage?
• A tidal cycle of two high tides and two low tides each day, with the high tides of nearly equal height.
• 1 kt of current equals how much wind?
• Estimated Position (EP) is based on what?
• Which of the following is one of the six DR rules?
• How is the dangerous semicircle around a moving LP system determined?
• At slow headway, what is more effective: rudder or tugs?
• Given 142° 13.9' West, what is the time zone offset from Zulu in hours?
• What navigational right exists in a nation's territorial seas?
• On a Preferred Channel Mark, what do the top and bottom colors indicate?
• In the INS wobble discussion, which description correctly defines damped operation?
• Between which landmarks does the Inshore Current flow?
• Which instrument measures wind speed and wind direction?
• Mean Solar Time is based on a fictitious sun moving at a constant rate. Which angular rate is used in this definition?
• What passage rights apply in archipelagic waters or international straits?
• If the GPS-INS difference is greater than the threshold, what happens?
• If the pivot point is forward of the stern, which end experiences the wind's lever arm most?
• Which of the following is true about a Safe Water Buoy's color and topmark?
• Which statement correctly expresses D = S × T for distance in nautical miles, speed in knots, and time in hours?
• What does IALA stand for?
• What does close isobars indicate about weather?
• What is the purpose of the fourth GPS satellite in the position-fixing process?
• Under the DR procedure, what should you label on each fix?
• Cloud Height Prefix: Cirro indicates which level of clouds?
• What is a NAVAID?
• What is the Celestial Prime Meridian?
• How is Mean High Water measured?
• Which instrument measures wind direction?
• Which action helps maintain GPS integrity during spoofing?
• Which statement best describes the Terrestrial Coordinate System?
• In a nation's internal waters, which statement is true regarding entry and suspension?
• If the pivot point is more aft, which end is more affected by wind?
• Optimum Track Ship Routing (OTSR) provides weather forecasts based on what?
• Declination with respect to the Sun helps determine which of the following?
• Which statement best describes how time zones are oriented along longitude?
• Declination is the angle from the Celestial Equator to the celestial body, measured North or South. It is the same as which terrestrial concept?
• What is a boundary between two air masses called?
• What is the topmark for a Special Purpose Buoy?
• During which twilight is the center of the sun 6 degrees below the horizon?
• How often should an alternate fix be taken?
• What defines sunrise?
• Which horizontal datum is used on nautical charts?
• With steady sternway, where is the ship's pivot point located?
• In coastal navigation (10-30 NM), after GPS, which fix source is used?
• What defines sunset?
• Which statement describes a Reversing Tidal Current?
• What reference points does the Horizon Coordinate System use?
• Dead Reckoning (DR) is defined as what?
• Where is a ship's pivot point with steady headway?
• Which is the highest priority for COG sensing if GPS is available?
• What is the recommended action regarding restarting GPS systems after spoofing is suspected?
• After receiving an OTSR, what is the required response time?
• Inshore flows generally move in which direction?
• Which statement correctly describes how the INS uses data to predict position?
• Which description best summarizes a high-pressure system's weather pattern?
• Visual Fix is represented by which geometric shape on charts?
• What is the declination value for the vernal and autumnal equinox?
• A psychrometer is a type of hygrometer and measures what?
• Greenwich Mean Time is synonymous with?
• What happens to lights when the buoy is occulting?
• Why navigate with the largest scale chart?
• Running Fix is a position determined by crossing lines of position obtained at different times and advanced or retired to a common time. How many NAVAIDs are used?
• What are the uncontrollable forces acting on a ship?
• Why is Mean Lower Low Water used for depths?
• Greenwich Hour Angle (GHA) is defined as
• When a ship is DIW, how does it tend to the wind?
• Which region uses Green Right Returning buoyage?
• What is the maximum length of any archipelagic baseline segment?
• Which instrument measures humidity?
• A complex tidal cycle, usually with two high tides and two low tides of unequal height per day.
• Which buoy can be used to mark the center of a channel?
• What is Air Pressure?
• Which tidal datum is used for depths?
• Which term is another name for Meridian Transit?
• What is the Kalman Filter used for in navigation?
• Which option is a DR rule about plotting?
• What is the maritime baseline?
• If the sextant index error is ON the arc, what correction is applied?
• Which statement about high-pressure systems is true?
• Which statement best describes the order in which fixes should be taken?
• What describes the great circle?
• Which propulsion arrangement causes a vessel to back into the wind?
• What is a correct description of an LP cyclone’s impact?
• A Rock feature is above water at high tide, uninhabitable. It is entitled to which zone?
• Where is a ship's pivot point when DIW?
• How are mooring lines named and numbered?
• In the distance-speed-time relationship D = S(T), what does D represent?
• How does current direction affect rudder effectiveness?
• In a set and drift calculation, which statement correctly identifies drift?
• The offshore ocean current is located outside the surf zone, beyond the end of the beach. Which option best describes its location?
• In tug assistance, which placement provides more leverage?
• Within 3 nautical miles of a coastline, which MARPOL discharge is allowed?
• In the Circle of Equal Altitude method, the radius of the LOP equals the zenith distance, and 1° of arc equals how many nautical miles?
• GMT is the same as which of the following?
• UNCLOS stands for?
• A triangle fix is formed by:
• A single screw ship tends to the wind how?
• On a single-screw ship, moving astern with the propeller rotating counterclockwise, the bow will walk to which side?
• The longshore current in the inshore region flows which direction relative to the shoreline?
• Which statement correctly identifies propeller currents?
• How is Mean Lower Low Water measured?
• Time at which the Sun crosses the observer's upper meridian is called what?
• Where is the Inshore Ocean Current located?
• Which expression defines the Target Angle TA?
• How often are GPS and INS predictions compared?
• Which statement correctly distinguishes HAZWASTE from HAZMAT?
• In the Northern Hemisphere, around a cyclone, wind blows how?
• On a single-screw ship, moving ahead with the propeller rotating clockwise, the bow will walk to which side?
• Which formula gives the geographic range R_geo?
• Which device can move 360º and provides multidirectional motion, unlike a bow thruster?
• Which front is described as a composite of warm, cool, and cold fronts and forms around low-pressure systems?
• Which coordinate system is used for mapping positions on the celestial sphere?
• Which system senses the ship's pitch, roll, azimuth, and attitude rates?
• Which current is described as flowing parallel to the beach in the offshore region outside the surf zone?
• What water-to-land ratio is allowed for archipelagic baselines?
• What is the Celestial Equator?
• In the navigable semicircle, how should you steer?
• Under the 6-minute rule, the distance in nautical miles covered in 6 minutes equals what expression in terms of speed S (in knots)?
• What is magnetic variation?
• Latitude is paired with which celestial coordinate, and horizon with which horizon coordinate?
• Which instrument measures wind speed?
• What is humidity?
• In the PIM calculation T = D(60)/S, what are the units of S?
• Which are the three types of tidal currents?
• Cloud Form Roots: Nimbus clouds are associated with which weather?
• Which buoy has color Yellow/Black/Yellow?
• What is the zenith?
• What are the three components of GPS?
• An anchored ship tends to wind how?
• Which statement about an anticyclone is true?
• What is a Line of Position (LOP)?
• How much horsepower is 1 ton bollard pull?
• Which solar time is based on the actual Sun’s apparent motion in the sky?
• Relative to a celestial body, what does declination help us fix?
• What is the topmark of a South Cardinal Buoy?
• In the example, ZD +5 is centered on which longitude?
• What about the anchor holds the ship in place?
• In an oil spill, what action is taken after minimizing the spill?
• Which tide phenomenon is described as higher tides during full and new moons because the Sun, Moon, and Earth are in alignment?
• Which instrument provides wind speed and wind direction in a single reading?
• The Lateral Separation Quick Trick yields lateral separation in what unit?
• Which sensor has the highest heading priority?
• In IALA Region B, what is the buoyage rule?
• No vertical change in tides.
• Which front is usually preceded by clouds of decreasing altitude?
• Which of the following statements is true about declination in navigation?
• What type of weather do you expect with lowering cloud height?
• Longitude is paired with Greenwich Hour Angle on the celestial side; which horizon term completes the pair?
• In the Semicircle Test, the opening can be up to how many nautical miles?
• What is Relative Humidity?
• Which statement best describes Archipelagic Sea Lanes Passage?
• Luminous Range is defined as what?
• Azimuth is defined as a horizontal angle measured clockwise from which reference line?
• Which statements describe Dead Reckoning (DR)?
• Geographic Position is
• Complete the analogy: Inshore current is to Longshore current as Offshore current is to ______.
• Between tugs, which position provides more leverage at slow headway?
• Why does the intersection of only two LOPs give an estimated position?
• What is altitude?
• During which condition are Spring Tides observed due to Sun and Moon on the same side of the Earth?
• What causes tides?
• How many satellites are required to compute a GPS position for a 3-D fix?
• What length of anchor chain is required to dredge, drag, and anchor the ship?
• A Rock feature is above water at high tide, uninhabitable. It is entitled to which zone?
• Nautical Twilight is best described as:
• A tidal cycle of one high tide and one low tide per day.
• Cloud Height Prefixes: Which prefix indicates middle-level clouds?
• If the sextant index error is OFF the arc, what correction is applied?
• Circle of Equal Altitude (LOP) is
• Which tidal datum is used for clearances?
• In the dangerous semicircle, how should you steer?
• In steering control, which statement best describes the relative effectiveness of tugs versus rudders, and which tug position provides more leverage?
• What is the primary purpose of FONOPS?
• Which statement best describes a Visual Fix?
• During Transit Passage, submarines may remain submerged and aircraft may be launched during transit.
• Under Innocent Passage, stopping is allowed only if incidental to normal navigation, force majeure, or rendering assistance.
• Which statement describes a Rotary Tidal Current?
• What information does a WEAX briefing provide?
• What is the Dew Point Temperature?
• Which tidal current rotates through all compass directions during the tidal period?
• What is the general flow of air relative to high and low pressure systems?
• MLLW is used for soundings and MHW for clearances. How is MLLW defined?
• Which of the following best describes Innocent Passage?
• According to the 1 minute rule, the distance traveled in 1 minute at 100 knots is expressed in which unit?
• Why is declination important to mariners?
• Inertia is defined as what?
• In the mnemonic 'Can Dead Men Vote Twice', what does Gyro correspond to?
• What is the correct sequence to determine Computed Visibility?
• Geographic Position is important because it allows navigators to
• What color pattern identifies a North Cardinal Buoy?
• What facilitates the digging of anchor flukes into the bottom?
• Greenwich Mean Time (GMT) is defined as mean solar time measured with reference to which longitude?
• What does GPS stand for?
• What is the Semicircle Test used for?
• In open ocean navigation (>30 NM), if GPS data is unavailable, which fix source is used next?
• Cloud Form Roots: Which cloud form is described as puffy?
• Which type of cyclonic weather system forms in the tropics?
• In IALA Region A, which buoy color marks the starboard side of a well-defined channel?
• What does FOM stand for?
• Which term defines wind?
• Nominal Range is the distance a light can be seen based on what visibility condition?
• Which cloud form is described as a sheet?
• Within 12-25 NM, which discharge is allowed?
• Where is a ship's pivot point when moving from all stop to all ahead?
• Which statement defines a rhumb line?
• Which characteristics belong to the Celestial Coordinate System?
• Which statement best describes a Ring-Laser Gyrocompass (RLG)?
• Temperature is defined as which of the following?
• Slack tide is defined as?
• How is an East Cardinal Buoy topmarked?
• Which cyclonic system has characteristics of tropical and extra-tropical systems and typically moves East to West?
• Wind-Driven Ocean Currents are primarily based on what factor?
• Which statement best describes Nautical Twilight?
• Beyond 25 nautical miles from the coast, which item is allowed to be discharged?
• Winter Solstice Declination
• When making sternway, how does the stern tend to the wind?
• What characteristic makes LP systems highly mobile?
• Which statement best describes a cold front?
• Which of the following is one of the DR rules?
• Archipelagic Baselines are used for nations made up wholly of islands. Which statement is true?
• Which tidal current is generated by a difference in water height at opposite ends of a strait?
• What is propeller side force?
• The coastal ocean current flows in which region and direction?
• In Region B, red buoys have which topmark?
• Apparent Solar Time is time as measured by the position of the Sun in the sky. Which term describes this?
• How do you decrease satellite clock error?
• What drives Thermohaline Ocean Currents?
• Which instrument measures temperature?
• Which is the recommended response to GPS spoofing?
• The mnemonic 'Even red nuns have odd green cans' helps remember which buoy characteristics?
• Order charts from largest scale to smallest.
• Mean Solar Time is defined as time based on a fictitious sun moving at a constant rate around the Earth. What is the angular rate of this fictitious sun?
• If you see a North Cardinal buoy, where is the safe water?
• Which property does a hygrometer measure?
• Which are the three coordinate systems used in navigation?
• In the Radian Rule, what does D represent?
• According to the 3 minute rule, the distance covered in 3 minutes at 100 knots is expressed in which unit?
• Which type forms outside the tropics?
• In PIM calculation, T represents what?
• What's the difference between a bow thruster and an APU?
• What error does the fourth GPS satellite help minimize?
• Occulting indicates what relation between light and darkness?
• NAVSSI outputs are used for which systems?
• When making headway, how does the bow tend to the wind?
• Isophase buoy lights indicate which relation between darkness and light?
• Which term describes resistance to a change in motion?
• What navigational right exists in a nation's internal waters?
• Buy Ballot's Law states, in the Northern Hemisphere, if you stand with your back to the wind, where is the LP system?
• Which statement about occluded fronts is true?
• If rounding the initial division of longitude by 15 yields ambiguity, which method should be used to determine the offset?
• What is a 'Poor Man's Tug' (dredging)?
• What colors do the bands on a Preferred Channel Mark display?
• Momentum is defined as which of the following?
• Which tide type has moderate tides during 1st and 3rd quarter moons because Sun and Moon are at right angles?
• Which tug makeup is described as the most versatile for deadsticking and can pin the ship to the pier?
• Which of the following correctly pairs operation with chain length multiplier?