'Space Assault' contract and techs ships

So anyone know how the rank 10 Techs contract works?  It says you have to kill 5 fighters using only techs ships, so how do I know which ships are Techs ships?  Also, I played a round exclusively as the Styx and got 4 kills towards this contract…

Use Jericho ships to complete that

And yet I completed this contract using the Styx one game and the anaconda M in the next.  I did have a jericho ship in my lineup though.  Next time it’s up I’ll try taking it out and see if I can still complete it.