Is it useful for turtles to bask in the sun in the water?

The tortoise basks in the sun, which can be done on the stone, and it is also useful for the tortoise to bask in the water. Turtles are cold-blooded animals. Sunbathing can raise body temperature, enhance activity and eat. But don't stay in the sun for too long, just one hour at a time. For reference only.