But what you are missing is that Radar energy is EXACTLY the same form of energy as visible light (ie its part of the electromagnetic spectrum) except its got a much much longer wavelength (think 100s kilometers instead of nanometers...). The power transfered is very small, tiny infact. If I was a Marine, Id be a little more worried about more "direct" threats to my health than an extremely remote possibility that this radar energy is going to give me cancer. Hell, id say the exhaust fumes from the tank are much more of a risk as far as a carcinogen is concerned than these radiowaves.