Final answer:
Modern technology has enhanced ocean-current studies with tools like GPS for tracking surface currents and autonomous underwater gliders with sensors. Other methods mentioned, like observing bird migration and using wind socks, are not used for studying currents but have applications in related areas.
Step-by-step explanation:
Traditional methods of studying ocean currents have evolved significantly with the advancement of technology. High-tech devices now employed for this purpose include:
- GPS tracking: This technology is used to track surface currents by observing the movement of devices or objects that are carried by the current and have GPS capability.
- Autonomous underwater gliders: These are equipped with sensors and can move through water independently. They gather data on various parameters including temperature, salinity, and current movements.
- Observing bird migration patterns: While useful for understanding ecological patterns, this method is not primarily used for studying ocean currents.
- Using wind socks: These measure wind direction rather than ocean currents, but are helpful in understanding weather conditions that may affect current patterns.
These high-tech methods have improved the accuracy and depth of information pertaining to ocean currents, which in turn helps in a variety of applications, including climate modeling and navigation.