Digger Two
From The Stargate Omnipedia
Radio call sign for the Tok'ra Tel'tak sent to render aid to the compromised Digger One spacecraft. Daniel Jackson and Samantha Carter managed to retrieve Jacob Carter/Selmak, who was on a mission at the time, to use the cargo ship to reach Digger One before their oxygen supply was depleted.
Digger Two crossed into the Goa'uld Heru'ur's unfriendly territory and Jackson was forced to use unorthodox means to distract two of Heru'ur's Ha'taks in order to reach Digger One.
Digger Two's ring transporter allowed O'Neill and Teal'c to be ringed aboard the cargo ship.
KEY EPISODE
Tangent - Jacob/Selmak's Tel'tak is assigned the designation Digger Two in its rescue mission of Digger One.