Based on helicopter surveys of the island, the 2004 Indian Ocean tsunami does not appear to have affected the Sentinelese adversely.

A helicopter survey in 2002 noted 1,500 nest sites.

Some were "excellent," he said, and they included parcels of land identified only through aerial photographs and a confirming helicopter survey.

Entergy has made helicopter surveys of those lines and hopes soon to complete projections about when they can be restored.

The rock shelter was rediscovered in 2006 during a helicopter survey of the land by the Jawoyn Association's Ray Whear and pilot Chris Morgan.

'We lease the land out to the forestry people, and they've been doing a helicopter survey.'

Nearly four years after the initial Congressional hearing, the EPA announced their first helicopter survey for the AUMs in September 1997.

The remains of only a few hoofed animals, other than elk, have been located in daily helicopter surveys; no grizzlies were lost, and just one black bear.

He has begun doing helicopter surveys of those waterways.

See if we have any helicopter survey scans - infrared or radar - that show a tower.