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Picture of Cheap reflective panel (cardboard and duct tape)
In this instructable I will show you how to make a Panel to signal planes, boats, etc. 

Step 1: Materials

Picture of Materials
-duct tape
-scissors 
-cardboard
-aluminum foil
 
Mihsin2 years ago
I once made a signal mirror out of car side mirror and scratched a pin hole in the middle for sighting the plane.