Asiana A320 incident: send cards

There has been an outcry in South Korea about the bizarre incident in which two Korean marines fired over 100 rounds at an Asiana A320 they mistook for a North Korean bomber. Oddly they did not shoot at the plane that over flew them 20 minutes earlier, and the ones before that - flight paths are, if anything, predictable.

Following the worrying incident (what if the marines had a MANPAD?) South Koreans are calling for improved training of their soldiers. I propose a simpler solution. Back in WWII soldiers were issued playing cards with aircraft silhouettes. The idea was to help them familiarize themselves with allied types. I'm not sure how many aircraft (if any) such cards saved from friendly fire, but it would be a good, low cost solution for the South Koreans and provided a much needed PR opportunity.