Blackbird
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
The blackbird is a prototype Colonial fighter craft constructed by Galen Tyrol, his deck crews, and other members of Galactica. This craft was meant to suppliment the Viper, given the issues with the remaining craft aboard the battlestar.
It uses an alloy to render itself invisible from DRADIS scanning, an idea given by Karl Agathon. (Flight of the Phoenix)