Since 1993 this has included night bombing and helicopter operations.

Allowing a widespread build up of experience in helicopter operations.

The two departments had not practiced helicopter operations for at least a year before the attack.

A small section of the runway is used for helicopter operations.

This was described as the largest helicopter operation in military history.

That facility will support helicopter operations to the ice shelf.

It was the country's first air facility developed solely for helicopter operations.

It provides oil industry support services and has extensive helicopter operations.

It is not clear how soon the close-in helicopter operations will begin.

These ships were among the first to take a new approach to helicopter operations from small warships.