Navigational instrument

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Synopsis: Transport & travel: Air travel: Navigational instrument:

and it works on the same principle that radar and sonar do#ut today s most advanced lidar is much more accurate,

The acronym stands for light detection and ranging and it works on the same principle that radar and sonar do

From roughly 10 feet above the seafloor its side-scan sonar sends out acoustic waves that build a two-dimensional map.

Scripps and the University of Delaware shipped 60 packages of equipment to Palau including underwater vehicles cameras various types of sonar

and scrolls through sonar images produced by the Remus. Grainy and reddish the sonar images look like transmissions from Mars. Some show deep scours;

he then added a layer with intriguing objects that had turned up in the sonar images.

While side-scan sonar provides a general impression of contours along the bottom it doesn't directly measure the elevations of features.

The Echoscope or multibeam volume imaging sonar does enabling oceanographers to map topography accurately and in high enough resolution to distinguish man-made objects.

Terrill describes it as the oceanographic seafloor-mapping equivalent of ultrasound sonar used to look inside the human body.

and O'brien. He carries a handheld sonar that displays acoustic images on an LCD screen allowing the divers to zero in on the floatplane even in five-foot visibility.

The sonar also revealed what Terrill says could be a new species of coral. When we reach the Corsair engineers lower the Remus now equipped with Gopro HERO3 HD cameras into the water

If you have a compass and a straight edge everything you draw is a box

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