ATSC 113 Sailing Modules Exam Questions with Correct Answers

ATSC 113 Sailing Modules Exam Questions with Correct Answers capillary wave - Answer-wind generated, small, short wavelength, acts as a restoring force with the water's surface tension gravity wave - Answer-wind-generated, gravity acts as restoring force, meters to kilometres long swell - Answer-formed by distant storms, gravity waves that travel long distances with little loss of energy - they take the shortest distance on the earth, curve-like rogue waves - Answer-these freak waves occur due to interference and result in a wave crest higher than the theoretical maximum interference - Answer-when two waves intersect they either cancel each other out or add each other up destructive interference - Answer-waves that cancel each other out and calm down constructive interference - Answer-waves that add each other up and create a bigger wave rogue waves - Answer-constructive interference of waves tsunami - Answer-caused by seismic events when the bottom of a wave meets the ocean floor - Answer-the wavelength is reduced wave height increases due to lagging waves building up behind the waves in front if the ratio of height:length exceeds 1:7, the wave breaks due to instability slope of the sea floor, tide and direction - Answer-influences the speed and type of wave break spilling breakers - Answer-occur across gently sloping sea floors, white water spills from the crest down the front plunging breakers - Answer-occur over a moderately steep sea floor, the crest falls in a curl forward with considerable energy surging breakers - Answer-Steepest sea floor Energy spread over shortest distance Best for body surfing Waves rapidly slide up the beach swell direction - Answer-forecast in degrees where 0=north and 180=South from where the swell is coming FROM