Well its basically dependant on detection method. In space ships are detected largely by their heat signature, which is incredibly hard to get rid of.

In atmosphere though, atmospheric temperature is far easier to blend in with, so I believe Radar and to a lesser extent Ladar are the primary methods, though details on this are few. People can still always detect you by just looking at you though, as not even the Geth have implented active camo on a ship scale, and they are definitely the most advanced in that area.

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There has been far more interest in this than I anticipated, and in the interests of my own sanity, I am going to place a limit on the upwards number of organisations. That number is ten (including myself). If you are already accepted, do not worry. If you are not already accepted, you have a week to get your sheets finished up and ready for me to select from.

At that time, I will select the four best sheets to be accepted. No-one loose hope however, as those who are not selected but still have good sheets will be kept on a list for me to contact when others drop out (and there are always a few. RL hates us all after all.).

During this time, I'll still be providing feedback and such as normal, just know that there is now a time limit.