Radar screen display from a boat. Radar uses radio waves to determine the distance and direction to objects. An emitter sweeps a radio beam around the boat (which is at the centre of the display),and a detector picks up the reflections from objects such as other boats and rocks. These are displayed as the red and yellow patches | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / De Schwanberg, Victor |
Taille de l’image : | 4686 px × 3648 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |