Viper 8757
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
Viper 8757NC is a Viper Mark VII assigned to the battlestar Galactica (Lay Down Your Burdens, Part I).
A Viper Mark II of the same designation is flown by Kara Thrace during a Combat Air Patrol protecting a Fleet underway replenishment operation. This Viper is the one Thrace is later lost in, crushed by intense atmospheric pressure (Maelstrom).