Tachyon detection grid

An activated tachyon detection grid.

A tachyon detection grid was a technique developed by Star Fleet as a means of detecting cloaked Romulan warships. The grid used active tachyon beams transmitted between different starships or sentry posts to create a tachyon field; any cloaked ship entering this field would be exposed. The technique was developed by USS Enterprise-D Chief Engineer Geordi La Forge in early 2368, although it resembles and was probably derived from crude sensor grid techniques used to detect cloaked ships that had been used as far back as 2154 in the buildup to the Earth-Romulan War.