The heading sensor has shown that they move with the directionality of a car moving on a highway. Being in the ocean a lot and knowing the great variability in currents, speeds, and directions, it stunned me that the animals could do that. While at Cocos, hammerheads appear to be in a somnolant state. That's not known. Animals generally have elements of what we do, but if you try to say whether they do it exactly, the answer is no.
Many sharks remain on the bottom in a quiescent state.
Hammerheads rest during the day, though they are continually moving and socially interacting.