A fathometer is technology Question 3 Select one: a. that was used by Alfred Wegener in WWII to detect and measure the direction and speed of movement of the continents. When these routes were plotted backward, it revealed that they had been connected in a supercontinent. b. based upon sonar developed in WWI that can measure water depth and thus map the bathymetry (shape) of the seafloor by bouncing sound waves off the seafloor. It revealed oceanic ridges and trenches. c. that was used by Alfred Wegener in WWII to detect and measure the amount of centrifugal force available from rotation of the earth. It revealed the direction and speed of movement of the continents. d. based upon sonar developed in WWI that can measure the magnetic polarity of the granitic rocks of the seafloor. It revealed magnetic stripes parallel to the oceanic ridges