re: #813 Vambo

I thought that said “CBT”…

note to self, browsing porn and LGF at the same time causes confusion.

A crystal gravfield trap (CGT) was a rare and expensive type of sensor that used a synthetic crystal grid to detect and identify fluctuations in the local gravity field. They could be blocked by the presence of mass, not being able to detect a ship on the far side of a planet due to its mass.