How marine scientists investigate the ocean underlying geology, and organisms living in the water?

sonar and GPSStudy of the ocean current, temperature, salinityStudy of the biologyearth studying satellites

Explanation:

The marine scientist makes use of the devices like the GPS and the sonar and they also study the movement of the oceanic current, including the study of the salinity conditions and temperature and the rise of the biodiversity of the species and also generated data from the earth marine satellites. These data are essential to help us to study the patterns of the marine geology and seafloor studies of the 0cean deeps.