Livefree...
You are sadly misinformed... the NHMP most certainly do use LIDAR on the lake...
Here is a link to the unit they use... it has a 2000' effective range with a 3' x 3' square @ 1000'... much past 1000' and the radar operator may start to pick up chatter from the sparay & waves. LIDAR works best on flat surfaces such as automobile front ends, it does not work well nearly as well on curved surfaces such as boat bows.
http://www.kustomsignals.com/product...pagename=lidar
the radar unit...
http://www.kustomsignals.com/product...ename=handheld
There are various laser jammers out there, and they will effectively prevent "burn through" here is a site that test the various laser jammers...
http://www.laserjammertests.com/index.htm
http://www.guysoflidar.com/
Woodsy