View source for Covert Data Link

Covert Data Link allows you to use old friendly codes for ships and planets for all purposes that you would normally use a friendly code for. This means even if a player changes their friendly code, you can still use it the next turn with a 100% success rate. You can do all the normal things you could do with a matching friendly code, such as travel through minefields, beam up minerals from a planet, use Harmonic Weapon Modulation against a ship, etc., even though the planet or ship has changed its friendly code. 

=== Odds of Success ===
For every turn after the 1st turn of using an old friendly code, the odds of success of the FC working are reduced by 10%. So 2 turns after a friendly code has changed, there is a 90% success rate. 3 turns afterwards there is an 80% chance, etc. This chance of success is calculated for every individual ship using that FC. If one of your ships fails in using a friendly code, that code is permanently revoked, and no other ships can use it. 



===Notes===
[https://www.youtube.com/watch?v=Ct2CgIeE-so#t=5h21m15s Explanation of Covert Data Link by Joshua] at PlanetsCon 2022