Question 954Navigation General70% to pass
All echo-sounders can measure the _______________.
AI Explanation
The correct answer is B) actual depth of water below keel.
Echo-sounders, also known as depth finders, measure the actual depth of water below the vessel's keel. They do this by transmitting a sound pulse and measuring the time it takes for the pulse to reflect off the seafloor and return to the transducer. This time measurement is then converted into a depth reading, which represents the true water depth beneath the keel.
The other answer choices are incorrect because they do not accurately describe the primary function of an echo-sounder. Option A refers to the average depth to a soft bottom, which an echo-sounder cannot measure directly. Option C is too broad, as echo-sounders measure the actual depth, not just the average. Option D refers to the average depth from the waterline, which is not what an echo-sounder is designed to measure.
Related Questions
#952 When using an echo sounder in deep water, it is NOT unusual to _______________.#953 When using a recording depth finder in the open ocean, what phenomena is most likely to produce a continuous trace that may not be from the actual ocean bottom? #955 An electronic depth finder operates on the principle that _______________.#956 When using GPS without Selective Availability, you may expect your horizontal accuracy to be better than _______________.#957 When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?