An instrument that would be useful in locating a sunken ship at the bottom of the ocean is Sonar. So, the correct option is A.
An ocean is a continuous body of high pH of water that is contained in an enormous basin on Earth's surface. It is considered an important habitat for aquatic organisms.
Sonar stands for Sound Navigation and Ranging. It uses sound waves to see the objects in the water.
Therefore, an instrument that would be useful in locating a sunken ship at the bottom of the ocean is Sonar.
To learn more about Sonar oceanography, refer to the link:
https://brainly.com/question/13577114