Offshore zone: extends from the low water mark to a water depth of about 15 m (49 ft) and is permanently covered with water.

UNESCO: L O S S A R Y

Offshore finance and information services are important foreign exchange earners and thrive from having the same time zone as eastern US financial centers and a relatively highly educated workforce.

FORBES: Barbados

As soon as a helicopter goes beyond the 80-mile zone covered by land-based radar, its signal is picked up by the offshore platforms, with the data then returned to the airport.

BBC: Helicopter location system begins