Oceanographic instruments are specialized tools used to study the ocean's physical, chemical, and biological properties. These instruments help scientists measure various factors such as temperature, salinity, and currents, providing valuable data for understanding ocean dynamics and climate change. Common examples include CTD sensors, buoys, and autonomous underwater vehicles. These instruments can be deployed from ships, buoys, or even remotely operated vehicles. They collect data that is crucial for marine research, fisheries management, and environmental monitoring. By using these tools, researchers can gain insights into ocean health and the impacts of human activities on marine ecosystems.