Sounds bad to me...
The purple shape you describe sounds more like a High Intensity Radio Transmission Area (HIRTA), the numbers and letters beside it being the frequency band and the worst case avoidance height. A JTIDS avoid is more like a wheel rim with cog teeth all around it.
The upside down pacman is a hangliding site, the W signifying that a winch system may be used (up to 3000' at normal glider sites) and the number represents the LFA and site number.
The diamond could either be an industrial avoid as mentioned above but could equally be a nature reserve.
Last edited by Aynayda Pizaqvick; 16th Jun 2012 at 18:01.