military chart symbols
Hi
Can anyone please explain the following 3 symbols on the MOD charts?
1) Purple(ish) radiating lines, rather like an 8-spoked bicycle wheel sometimes with an alphanumeric designation or asterisked number (height?)
2) "Inverted blue pac man" on the half-mil chart with a number after it in the format "x/xxx" or on the quarter mil chart either shaded or with a "W" next to it.
3) The red diamonds, sometimes in a shaded ring.
I trust you won't think it a risk to security to explain these symbols. I gave back my ID card a long time ago...
Thanks in advance.