men moving in an sonar usually messages settler velocity to lose their equator
sinking is not descent. drifting is not translation_random_trajectory. drifting is translation_random_trajectory. sonar is not measuring_instrument. passive_sonar is not sonar_device. passive_sonar is sonar_device. translation_random_trajectory is not translation. sonar is navigational_instrument. navigation_beacon is not stationary_artifact. sonar is not navigational_instrument.