The FIRST NAVY Infrared Camera System (image) Helmholtz Association Share Print E-Mail Caption The FIRST Navy thermal imager is installed in Polarstern's crow's nest at a height of about 28 m above water on a highly stabilized platform (white basis). The sensor head (green) rotates at 5 revolutions per second. In the crow's nest the wind often blows at gale force strength due to the ship's superstructure while the temperature plummets to minus 30° C, presenting highest demands to the system. Credit Photo: Lars Kindermann, Alfred Wegener Institute Usage Restrictions no commercial use Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.