51 For your safetyVEGAPULS 61 • Profibus PA47106-EN-161104• Manholes and flanges on the vessel must be closed and sealed toavoid penetration of the radar signal• The instrument should be preferably mounted on top of the vesselwith antenna orientation downward• The instrument must only be installed and maintained by appropri-ately qualified staffFor operation outside of closed vessels, the following conditions mustbe fulfilled:• The installation must be carried out by trained qualified personnel• The instrument must be stationary mounted and the antennadirected vertically downward• The mounting location must be at least 4 km away from radioastronomy stations, unless special permission was granted by theresponsible national approval authority• When installed within 4 to 40 km of a radio astronomy station,the instrument must not be mounted higher than 15 m above theground.You can find a list of the respective radio astronomy stations in chap-ter "Supplement".1.8 Environmental instructionsProtection of the environment is one of our most important duties.That is why we have introduced an environment management systemwith the goal of continuously improving company environmental pro-tection. The environment management system is certified accordingto DIN EN ISO 14001.Please help us fulfil this obligation by observing the environmentalinstructions in this manual:• Chapter "Packaging, transport and storage"• Chapter "Disposal"