Which is closer to the sea a helicopter flying at 302 meters above sea level or a diving bell 275 meters below sea level?

The diving bell, located 275 meters below sea level, is closer to the sea compared to the helicopter flying at 302 meters above sea level. While the helicopter is above sea level, the diving bell is submerged underwater, making its position closer to the surface of the sea. Therefore, the diving bell is the closer of the two to the sea.