Modern underwater drones are like miniature submarines without crew. These submarine drones are challenging to send radio signals to. They can be autonomous, using their onboard sensors to function. Another method is a long tether that allows for a direct connection between ship and drone.
Using underwater drones to monitor underwater plant species
Those with infrastructure underwater also use them. Drones are used to monitor building underwater and help provide oil and other essential services to society. These drones are durable enough for multiple deployments.