[Cheeze]

I will agree and disagree on this one. Yes, after you have fought with an opponent, they know the design of your ship so in that sense the scanner jammer is useless. However, putting one on a transport won't let your enemy know WHAT that ship is carrying, he will only know how much that transport can carry. More, if your ships are damaged, an enemy won't know how much and where, which may be enough to dissuade an attack..all the more so if they do know what is on a particular warship. And if they have never seen a class of warship, not having scattering armor or a scanner jammer (if they have long range scanners or psychic scanning facilities) will leave your opponent wondering just how a ship is designed.

While it may cost more to have a scanner jammer AND four pieces of Armor 3, the latter provides more protection (except for the defense bonus of the armor). Scattering armor adds 150pts, but 4 pieces of Armor 3 is 160pts. Perhaps the scanner jammer should give a similar defense bonus.

Whether or not it is ultimately worthwhile is up to you, but I have used long-range scanners, and my ability to know how ships were equipped or what cargo they carried was important enough to allow me to frustrate an enemy attack by taking out the key ships or eliminating a transport filled with population (to boost a planet's use or production) or troops. Scanners have helped me against an enemy who has satellites and fighters in a position, because they never let you know the type or quantity of specific units there are.