Respuesta :
Answer:
The correct answer is:
z. Multibeam and side-scan
Explanation:
The correct answer is:
z. Multibeam and side-scan
Multibeam and side-scan are two types of sonar used for underwater mapping and imaging.
1. **Multibeam sonar**: This type of sonar uses multiple beams of sound waves to scan a wide area of the seafloor simultaneously. It provides detailed bathymetric data, including information about the depth, shape, and features of the seabed.
2. **Side-scan sonar**: Side-scan sonar sends a single beam of sound waves to the side of the sonar device. It produces high-resolution images of the seafloor and objects on the seafloor by scanning horizontally along the path of the sonar device. Side-scan sonar is often used for detecting underwater objects, such as wrecks, debris, or geological features.
The other options (high beam and low beam, rapid and slow beam, forward and back scan) do not accurately describe types of sonar commonly used for underwater mapping and imaging.
Final answer:
The two types of sonar described are multibeam and side-scan. Multibeam sonar calculates ocean depths by measuring sound echo times, while side-scan sonar measures echo strengths to create detailed images of the seafloor. Therefore option (z) Multibeam and side-scan is the correct answer
Explanation:
Which of the following describes two types of sonar? The correct answer is multibeam and side-scan. Multibeam sonar, mounted in the ship's hull, calculates ocean depths by measuring the time elapsed between the emission of sound bursts and the return of echoes from the seafloor. In contrast, side-scan sonar, mounted on towed "towfish" units, measures the strength of echoes rather than their timing. This allows it to produce images resembling black-and-white photographs of the seafloor, which is useful in locating shipwrecks and other archaeological sites beneath the surface. Unlike multibeam, side-scan is not primarily used for depth data but for creating detailed images of the ocean floor. Therefore, these two types of sonar serve complementary purposes in oceanographic surveys and underwater archaeology.
