Sound waves from ships and radio waves from satellites are two of the most common ways to measure the depth of the sea. But many of those creatures were in fact real, like the megalodon — a prehistoric shark that could be the size of a school bus! However, thanks to modern technology we can say that present-day sharks are commonly found at depths of around 2, meters 6, feet. But how do we know this? There are flat surfaces, but there are all sorts of underwater landforms such as canyons, trenches and underwater volcanoes.
The average depth of the ocean is 3, meters 12, feet. But the deepest part ever recorded is located in the western part of the Pacific Ocean, in the Mariana Trench, at a depth of around 11, meters 36, feet.
Bathymetry is the scientific term for measuring the depth of water in oceans, lakes and rivers. Bathymetric maps are similar to land maps in that they show the different underwater landforms in a specific area. Scientists and researchers can use different methods to measure ocean depth.
The most common and fastest way of measuring ocean depth uses sound. Ships using technology called sonar, which stands for sound navigation and ranging, can map the topography of the ocean floor. The device sends sound waves to the bottom of the ocean and measures how long it takes for an echo to return. Multibeam echosounders MBEs , a type of sonar that sends out rapid sound waves in a fanlike formation to scan the bottom of the ocean floor, are used by the National Oceanic and Atmospheric Association NOAA to measure the depth of the ocean.
How are sounds viewed and analyzed? How is hearing measured? What sounds can people hear? What sounds can animals hear? Sounds in the Sea What are common underwater sounds? How does sound in air differ from sound in water? How do people and animals use sound in the sea? Why do sounds have certain properties? How will ocean acidification affect ocean sound levels? How does marine life affect ocean sound levels?
How does shipping affect ocean sound levels? Spherical Spreading Propagation from a sound source array in the near field and far field Wave Front Propagation How does sound travel in shallow water? How does sound travel in very shallow waters?
Use of Sound How do marine animals use sound? Marine Mammal Communication Individual-specific Vocalizations Group-specific Vocalizations Vocalizations Associated with Reproduction Sounds Associated with Aggression Marine fish communication Marine invertebrate communication Marine mammals feeding Marine fish and invertebrates feeding Marine mammal navigation Sound Production How do marine mammals produce sounds? How do fish produce sounds?
How do marine invertebrates produce sounds? Sound Reception How do marine mammals hear? How do aquatic birds hear? How do fish hear? How do marine invertebrates detect sounds? How did odontocete hearing evolve?
How is sound used to measure water depth? How is sound used to find objects on the ocean bottom? Fishing How is sound used to locate fish? How is sound used to identify fish? Communications How is sound used to communicate underwater? How is sound used to transmit data underwater? Research Ocean Physics How is sound used to measure temperature in the ocean? How is sound used to measure global climate change? Download image jpg, 36 KB. Overall, the ocean is pretty deep; however, its bottom is not flat or uniform, which means water depths in the ocean also vary.
Because the ocean is a big place and difficult to study, if you search online to find the depth of the ocean, you may end up with a range of results. The most-recent estimate of the average ocean depth of 3, meters 12, feet was calculated in by scientists from NOAA and Woods Hole Oceanographic Institution using satellite measurements.
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