Delta II | NATO 4A
Delta II | NATO 4A rode a Delta II into space from Cape Canaveral SFS, FL, USA, deploying its payload to Direct-GEO.
- Launch time
- Status
- SUCCESS
- Operator
- United States Air Force
- Mission type
- Government/Top Secret
- Rocket
- Delta II
- Launch site
- Cape Canaveral SFS, FL, USA
- Launch pad
- Space Launch Complex 17B
- Payload
- —
- Target orbit
- Direct-GEO

Mission timeline
- 1991-01-08T00:53:01.000ZDelta II lifts off from Cape Canaveral SFS, FL, USA.
- Delta II passes through max aerodynamic pressure (Max Q).
- Main engine cutoff — the first stage shuts down as planned.
- Stage separation — the first stage separates cleanly.
- Second-stage engine ignites for the next phase of flight.
- Orbit insertion confirmed — the vehicle is now in Direct-GEO.
- Mission success — all objectives completed.