When pan-searing scallops do you turn them over? When?

My dad makes great seared scallops. He makes sure they're patted dry before searing, uses a hot pan with a bit of oil, doesn't move them around, and flips them only once. Timing depends on thickness of scallops but he says not to overcook them.

Hello again Skip,
Cook scallops for about 1min 30secs each side in a hot skillet,

Quick answer fo you Skip. Yes