A friend of mine , I call him Wing Nut and when I get frustrated with him I call him Mr. Nut . Any how he is convinced that a radar gun like the police use would be the same thing as radar that you install on your mast . I have given up trying to tell him that his theory is wrong on many levels , he is not phased . Raytheon had a show and tell truck at our marina the other day so Mr. Nut goes in and gave the Raytheon sales rep a ear full . He could not understand why he got tossed out . So any how (I can't believe I'm asking my sailnet bud's this question) Is he on to something? We all know he is not . So maybe you could help me with some good natured , but snappy come backs .