It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Originally posted by Sideband
I have seen here and other places where CDs are being touted as great replacements for actual signal mirrors. Well, if you are lost and need to signal and happen to have a CD but no mirror, by all means use it. On the other hand, if you are putting together a kit and decide you want a signal mirror, then get a real signal mirror. A CD is only about 22% as reflective as an actual mirror and if they get wet, a CD can be destroyed. The paper side will peel off and take the reflective coating with it which leaves you with a small plastic frisbee.