Go Time is a Cassette in Deathloop.
Location[]

Found on a control panel inside The RAK in Updaam.
Transcript[]

Pishtchek: There's been a... new development, General. My men tell me the anomaly's energy will be past its peak on the proposed date of the demonstration. So... We have to accelerate the schedule by six weeks, otherwise the probability of a successful breach decreases to just 16 percent. The RAK team confirmed they can make the deadline, if they forgo the ejection seat, the life support system, and drop the shock absorbers from the landing gear.
The pilot, a Lieutenant—sorry, he's been promoted for this—Captain Colt Vahn, has been briefed, and he's still '110% on board' with the flight. In other words, we're moving forward with it. Maybe you can use that to impress the commission. Please excuse that I didn't call you immediately, but this is too sensitive, and your line is probably tapped.
Colt Note[]
Operation Horizon valued their experiment's schedule over their test pilot's safety.