What was found using sonar

By determining the time between the emission of the sound pulse and its reception, the transducer can determine the range and orientation of the object. Passive sonar systems are used primarily to detect noise from marine objects such as submarines or ships and marine animals like whales.

Rather, it only detects sound waves coming towards it. Passive sonar cannot measure the range of an object unless it is used in conjunction with other passive listening devices. The newly discovered shipwreck could be a "missing link" in Dutch shipbuilding, Manders said.

The timbers show that it was built by using a temporary framework of small outer planks, which were an intermediate step between traditional shipbuilding techniques and the new carvel style. Archaeologists think that the ship was journeying from the Baltic Sea and was bound for Antwerp now in Belgium, but in the early s was in the Netherlands when it sank. The cargo of copper on board could represent one of the earliest uses of copper for coins in Europe. Animals Wild Cities This wild African cat has adapted to life in a big city.

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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? How is sound used to measure currents in the ocean? How is sound used to measure waves in the surf zone? How is sound used to measure the upper ocean?

How is sound used to help make long-term measurements of the ocean? How is sound used to explore for oil and gas? How is sound used to measure, detect, and track oil? How is sound used to study undersea earthquakes? How is sound used to study underwater volcanoes? How is sound used to map the seafloor? How is sound used to research wind energy? Investigate Marine Animals How is sound used to study marine mammal distribution? How is sound used to estimate marine mammal abundance? How is acoustics used to monitor Arctic marine mammals?

How is sound used to protect marine mammals? How is sound used to study the distribution of marine fishes?