BDOC Navigation and Seamanship (NSS) Practice Exam

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• What is a chart in navigational terms?
• What is the surge rate commonly measured in?
• Which of the following best describes the function of the Automated Identification System?
• In which semicircle is it safest to navigate if caught in a hurricane?
• What is the purpose of a Primary Major Light?
• What is the drag circle in relation to anchoring?
• What is the distinction of flood current?
• What is a key advantage of the Gnomonic projection?
• What is the primary responsibility of the Bowhook in a boat crew?
• What does Amber Deck signify regarding air operations?
• A head bearing helps to identify which of the following?
• What is the excess amount of oil necessary to cause a sheen in water?
• What characterizes ebb current?
• In which scenario would spring lines be particularly important?
• Which system is essential for tactical mission planning in navigation?
• What color indicates a warning shot?
• What is the function of breast lines on a vessel?
• What is the purpose of the PMAP protocol?
• What does the Green Deck status signify?
• When reporting a whale strike, which factor is essential to include?
• Who assists the CO and Navigator in their duties?
• Which of the following describes the three segments of GPS?
• Which datum is used by the US Navy for navigation?
• What does the instruction "Stand by your lines" convey to the crew?
• Surge rate is a crucial factor when determining what in navigation?
• The change of speed affects which parameter in the equation for surge rate?
• What does a proper understanding of line characteristics help prevent?
• How is Geographic Position defined?
• What is a drop bearing?
• Which method does the US Navy use for UNREP?
• What should be done with a line that is parting?
• What type of information is typically included in the status of navigation equipment during a navigation brief?
• Which of the following positions does NOT have direct responsibility for navigation?
• What is the primary purpose of dead reckoning in navigation?
• What type of data does a Raster Chart represent?
• Which phase describes the moon being farthest from the Earth?
• What does it mean to 'hold' a line?
• What do true bearings account for compared to magnetic bearings?
• What type of error can occur due to the magnetic properties of the vessel?
• What is the function of the Local Notice to Mariners?
• What information does Pub 150 provide?
• Which piece of technology assists in determining motion and position at sea?
• Which aspect is crucial to understand regarding line safety considerations?
• Surge rate is essential for what type of navigation planning?
• What is the purpose of the List of Lights in navigation?
• In navigation, what does the term 'letting go circle' refer to?
• How do you calculate GMT from local time?
• What does the 1 minute rule help calculate?
• What color jacket is worn by the Chock and Chain Personnel on the flight deck?
• Which officer is responsible for supervising the Combat Information Center?
• With what color does the Yellow Jacket identify in flight operations?
• What jacket color does the Winch Operator wear during UNREP?
• What is the main role of the Helm Safety Officer?
• What do the Nav Rules and Regs (COLREGS) aim to do?
• What is indicated by a green light on the SGSI?
• How many time zones exist across the globe?
• What is one advantage of the Mercator projection?
• Which officer serves as the Commanding Officer's direct representative on the bridge?
• Mean Lower Low Water Springs (MLLWS) refers to what measurement?
• Which personnel are designated as the Fueling Team on the flight deck?
• What does a datum represent in navigation?
• What is the main purpose of the Navigation Brief?
• What type of data is found in the Nautical Almanac?
• In nautical terms, what does 'payout' mean regarding a line?
• Where is the TACAN system located on a ship?
• In GPS systems, what does the user segment consist of?
• Which officer is in charge of overseeing the ship's combat systems?
• What does the term "mixed tides" refer to?
• What does the acronym OOD stand for in navigation protocols?
• What is the optimal frequency for plotting a dead reckoning position while in open ocean?
• What is the primary function of easing a line?
• Mean sea level is defined as?
• What defines a Major Light in navigation?
• What color signifies a danger shot?
• What is the precedence for determining visual fixes?
• Which organization publishes the Light List?
• What does the term "ground tackle" refer to in the context of navigation?
• Which of the following is a type of towing approach?
• Gyrocompass error results from which of the following factors?
• What is the general purpose of buoys in navigation?
• What is the benefit of using a Mercator projection for navigation?
• What marking convention is used in IALA A buoyage system?
• How is longitude related to calculating time zones?
• Perigee refers to which lunar position?
• When should a dead reckoning position be plotted after obtaining a fix?
• What are spring tides characterized by?
• What software system is designed to estimate latitude and longitude astronomically?
• What is the primary responsibility of the Combat Information Center Watch Officer (CICWO)?
• What is the depth equivalent of one fathom?
• How many Lines of Position (LOPs) are necessary for establishing a fix?
• What should a navigator look for when assessing if an anchor is dragging?
• Which document serves as a planning guide with detailed coast and port information for foreign waters?
• What is the primary purpose of calculating the surge rate?
• What is the purpose of the Optimum Track Ship Routing (OTSR)?
• What do the CO's Standing Orders include regarding emergency protocols?
• What is a disadvantage of the Gnomonic projection?
• What does the term AIS stand for in navigation?
• What color indicates the second to last shot in anchoring?
• What is waste oil?
• Who are the minimum boat crew members required for operations?
• What does the term "set" refer to in navigation?
• What role does a navigational aid play during a head bearing?
• What constitutes oily waste?
• If a vessel travels a distance of 100 yards at a speed of 4 knots, what is the time taken?
• In the context of UNREP, who wears the Blue Jacket?
• Which officer has the responsibility for navigating the ship safely while reporting directly to the CO?
• What do US Fleet Guides provide?
• Which document provides the International Code of Signals?
• What is the significance of understanding induced magnetism?
• What is the definition of Mean Low Water Springs (MLWS)?
• What color jacket does the Flight Deck Safety Officer wear?
• What is permanent magnetism?
• What does ZULU time represent in GMT?
• Which officer is primarily responsible for the training and supervision of enlisted members on the bridge watch team?
• Which of the following is NOT a typical content covered in a navigation brief?
• What is the cause of deviation in navigational terms?
• Which statement about holding a line is correct?
• What does the 6 minute rule calculate?
• Which of the following is NOT one of the rules of dead reckoning (DR)?
• What is a sea cock used for in boat operations?
• Who serves as the Navigator's direct representative to assist the OOD and JOOD?
• What does 'anchor aweigh' indicate?
• Who are the personnel responsible for crash and salvage on the flight deck?
• What color jacket does the Corpman wear in UNREP operations?
• Which types of tides are identified in tidal studies?
• What does a red sector light indicate?
• Which technology is referred to by the acronym RADAR?
• If a fix is outside the drag circle, what does this indicate?
• What jacket color is associated with a Gunner's Mate during UNREP?
• What does the term 'stern' refer to in nautical terminology?
• Which color is used for turning points in sector lights?
• What does NATOPS stand for in the context of naval aviation?
• Which of the following factors contributes to navigation errors?
• What is the primary duty of the Tactical Action Officer (TAO)?
• What is the purpose of Coast Pilots?
• What does Mean High Water Springs (MHWS) indicate?
• Which organization publishes the Radio Navigation Aids?
• What does the term "error chain" relate to in navigation?
• Which angle measurement pertains to the sun's position during Local Apparent Noon?
• Under what conditions is a Boat Officer required to be present?
• SHA is an acronym for which term in navigational context?
• For safe navigation, which aspect is essential to consider during a brief?
• What organization publishes nautical charts in the United States?
• What does LHA stand for in navigation terms?
• What happens to waves during sub refraction?
• What type of hazards does HAZMAT cover?
• Which of the following best explains the function of a buoy?
• Which of the following is NOT an input of the Navigation Sensor System Interface (NAVSSI)?
• Which line is most appropriate for lateral stabilization of a ship?
• When checking a line, what must you ensure?
• What does OPREP-3 Navy Blue involve?
• What unit is NOT typically used in measuring surge rate?
• During UNREP, what color jacket is assigned to the Signalman?
• What is indicated by the Amber Deck status?
• Which of the following describes Minor Lights?
• In maritime navigation, what must be considered when calculating actual arrival time?
• Which factor is NOT listed as inhibiting navigation?
• In which scenario would oil lose its utility?
• What type of line is used to measure lateral separation between ships?
• What is Marlinspike Seamanship primarily concerned with?
• Induced magnetism is defined as what?
• When instructed to "Slack (line #)", what should be done?
• What does SGSI stand for in flight operations?
• What action should be taken if the anchor may be dragging?
• What defines a Great Circle?
• What does Mean Higher High Water (MHHW) measure?
• What is essential for understanding deck fittings during mooring operations?
• Who publishes the Local Notice to Mariners?
• Which officer is responsible for directly controlling the engine and rudder angles of the ship?
• The concept of Geographic Position is crucial for what purpose?
• Which of the following describes the process of obtaining a fix?
• What marks the beginning or end of Nautical Twilight?
• What is a key consideration for using Minor Lights?
• What does 'taking in' a line refer to?
• What formula represents speed using distance and time?
• What types of shapes can buoys have?
• Which color is NOT a part of the color-coded markers used in the Phone and Distance Line?
• Which type of tide occurs only once a day?
• Which of the following is a substantial hazard to human health or the environment?
• Which jacket color represents a personnel member assisting in physical treatment or first aid during UNREP?
• What does Pub 151 provide information about?
• Within what distance of the point of tangency is distortion on a Gnomonic chart tolerable?
• What is one of the responsibilities of the Engineering Officer of the Watch (EOOW)?
• How many feet are equivalent to one shot?
• What does the term 'approach track' refer to?
• What describes the relationship between distance, speed, and time in nautical navigation?
• What does "variation" refer to in navigation terms?
• What is the role of the Officer of the Deck (OOD) on the bridge?
• What is a key characteristic of Nautical Twilight?
• If the speed changes by 2 knots, what is the surge distance?
• What does FOM stand for in the context of GPS?
• In navigation, what does the term 'bow' refer to?
• What color jacket does the Safety Officer wear during UNREP operations?
• Where are Secondary Major Lights typically established?
• What does 'short stay' refer to in anchor terminology?
• Which countries typically follow the IALA B buoyage system?
• Which officer would likely be involved in hands-on navigation decisions during operations?
• Mean High Water (MHW) is defined as?
• Who is ultimately responsible for the safe navigation of the ship?
• What is the role of the Rigger during UNREP, and what jacket color do they wear?
• What is the purpose of easing a line?
• What is the primary purpose of a FOD walkdown on the flight deck?
• What does the command "Pass (line #)" mean in maritime operations?
• What safety protocol is associated with returning large groups after sunset?
• Who assists the Tactical Action Officer in executing tactical decisions on the ship?
• Which type of light would be set up in rivers and isolated locations?
• Normal refraction causes waves to:
• What is the designated jacket color for a Rig Captain during UNREP?
• What function does TACAN serve for pilots?
• What may cause a fluctuation in the strain of the anchor chain?
• What is the purpose of the Boat Officer during operations?
• Who is required to attend the navigation brief?
• What describes a catenary in nautical terms?
• Which position acts as the principal assistant to the Officer of the Deck (OOD)?
• What does LAN refer to in navigation terminology?
• How is the swing circle defined in navigation?
• What is the effect of super refraction on waves?
• What occurs during a backdown towing approach?
• When is an anchor considered 'up and down'?
• Which of the following is a component of emergency protocols in a navigation brief?
• What does HAZMAT stand for in maritime operations?
• What does it mean when two ships are 'in-step'?
• Which of the following is a disadvantage of the Mercator projection?
• What does The Stand refer to in tidal terms?
• Which of the following is NOT a line safety consideration?
• What does a red light on the SGSI indicate to a pilot?
• The term 'surge rate' primarily pertains to what aspect of navigation?
• Which of the following signifies that an anchor is 'dragging'?
• What does Mean Lower Low Water (MLLW) represent?
• Which method is used for astern refueling in maritime operations?
• What does a Vector Chart consist of?
• What does VMS stand for in maritime navigation?
• What action should be taken when heaving in line?
• Which tidal measurement focuses on the higher tides only?
• What does the acronym PIM stand for in navigation?
• Which of the following best describes the timeframe of Civil Twilight?
• What is the purpose of the 3 minute rule in navigation?
• What defines Civil Twilight?
• What is specified in the CO's Standing Orders relating to communications?
• Which officer on the bridge supervises the helmsman?
• What is the primary strategy for navigating in a hurricane?
• Which sign might suggest that the anchor is dragging?
• How is surge rate calculated based on a change in speed?
• What is the value of the International Date Line (IDL) in degrees?
• What are the two types of chart projections used by the US Navy?
• Which factor can lead to gyrocompass error?
• What is one of the environmental impacts considered in PMAP?
• What should sailors do if they are in the most dangerous semicircle of a hurricane?
• In navigation, which term relates to planning the route and expected speed?
• What does the command "Take strain on (line #)" signify?
• How are mooring buoys held in place?
• Neap tides occur when the moon is in what position?
• When should OTSR be requested before Estimated Time of Departure (ETD)?
• How is Mean Lower Low Water (MLLW) calculated?
• How are lights important for maritime navigation?
• What is described as slack water?
• Which IALA region uses Red port, Green Starboard markers when returning to harbor?
• What is the meaning of GHA?
• In navigation terminology, what is meant by "drift"?
• What does WEAX stand for in navigation terms?
• What is a Rhumb Line?
• What role does the Purple Jacket serve?
• Which reference represents average heights during spring tides?
• Which line is specifically used to prevent a ship from moving forward and aft?