NAUI Instructor School- Exam Questions with Correct Answers 100% Verified

NAUI Instructor School- Exam Questions with Correct Answers 100% Verified Lubber line - ANSWER -Indicates the course or bearing the user will follow Stationary reference line on compass Basic types of compass - ANSWER -Direct and Indirect reading Marking a surface position is done by - ANSWER -Establishing a "fix" with a set of bearings or ranges Niche - ANSWER -The position each species occupies in it habitat Lights required for a night dive - ANSWER -2 per diver How to mark an exit point for a night shore dive - ANSWER -Establishing a range with two lights placed in a line with the exit Deep dive - ANSWER -Any dive deeper than 60 ft Principle for establishing correct weight to be worn by a diver - ANSWER -The diver should be neutrally buoyant during the safety stop at the end of the dive with an empty buoyancy compensator and cylinder near reserve pressure Two fundamental types of search pattern - ANSWER -Circular and Straight Pilotage - ANSWER -Location is confirmed with visual references Reciprocal Course - ANSWER -An outbound course in a straight line with the return in the opposite direction along the same line First step in searching for an object under water - ANSWER -Define the search area Two types of lift bags - ANSWER -Open bottom & Pillow Where tidal currents are significant, diving from shore should generally be conducted at or near high or low tide because: - ANSWER -There is a little tidal current near slack tide Trimix - ANSWER -2 inert gasses & oxygen Wavelength - ANSWER -Distance from Crest to Crest of waves Cause of tides - ANSWER -Gravitational pull of the moon 3 Tide cycles - ANSWER -Diurnal - 1 high 1 low per day Semidiurnal - 2 high 2 low of equal sizes per day Mixed - 2 high 2 low of differing sizes per day Current parralell to the beach - ANSWER -Longshore Current Primary cause of offshore currents - ANSWER -Wind The horizontal boundary between waters of different salinity - ANSWER Halocline Most common plants in the ocean - ANSWER -Phytoplankton Most common toxic poisoning in ocean fish - ANSWER -Ciguatera Waves caused by the wind increase in size with the wind velocity, duration, and: - ANSWER -Fetch Because of the Coriolis force, major ocean currents tend to flow: - ANSWER Clockwise in the Northern Hemisphere, counterclockwise in the Southern Hemisphere The intertidal area in which plant and animals are adapted to withstand water loss, temperature extremes, and strong water movement is termed the: - ANSWER Littoral zone When approaching the shore, large swells over a moderately steep bottom slope tend to cause: - ANSWER -Plunging breakers Apx number of high tides per 24 hr day - ANSWER -2 The seasonal breakdown of the thermocline in a fresh water lake is termed a/an: - ANSWER -Turnover Rip current flow - ANSWER -Perpendicular away from the shore Red tide - ANSWER -Result of a plankton bloom Percentage of all animal species that are invertebrates - ANSWER -97% Strongest areas for river currents - ANSWER -Surface, in the middle, along outside edges in bends Epilimnion - ANSWER -Sun-warmed waters of lakes and quarries form an upper layer of water during the summer What causes higher than normal spring tides - ANSWER -When the solar tide reinforces and amplifies the lunar tide Beaufort Scale - ANSWER -Scale for measuring wind force/speed When waves move into shallow water: - ANSWER -The wave velocity decreases and the wavelength decreases