Q. Sonar is used to locate and assess fish shoals, in order to

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Q. Passive sonar, functioning as detecting acoustic signal in

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Q. Source levels for fish tracking ranges between

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Q. In water, seismic eruptions raises noise up to

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Q. Marine mammals, such as dolphins and whales, producing sound ranges from

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Q. Acoustic Harassment Devices (AHDs), performing function in warning marine

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Q. Low frequency sonars are used for broad

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Q. AHDs stands for

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Q. All commercial vessels are equiped with

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Q. High-frequency sonar has a frequency up to

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Q. Noise from ships originates from propellers and

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Q. Scientific usage, working on detection of fishes, estimation of biomass and

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Q. Almost, 33% of pollution, originated in the

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Q. Major parts of all pollutants, originated in

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Q. Approximately, 12% of pollution is due to maritime and

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Q. About, 44% of pollution have as its sources run off and

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Q. 10% of pollutants derive from

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Q. Increased concentration of carbon dioxide in atmosphere contributes to

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