A format of translation where two persons work closely together similar to Pair programming, an agile software development technique in which two programmers work together at one workstation. In this technique One, the driver, writes code while the other, the observer, pointer or navigator, reviews each line of code as it is typed in. The two programmers switch roles frequently.
Seems Guerilla Translation use a similar format for pair translation with one person as a driver translating the content while the observer is in charge of editing.
This format can be done long distance using videochat and co-writing tools such as etherpad.