| T-7:00:00 |
Formal Countdown Initiation: Pre-Launch Briefing of Officials |
| T-6:00:00 |
Closure of Mahia Launch Site Access Road |
| T-4:00:00 |
Electron to Vertical Position, Start of Rocket Propellant 1 Loading |
| T-2:30:00 |
Launch Pad Evacuation |
| T-2:00:00 |
Liquid Oxygen Loading |
| T-1:00:00 |
Aviation Authority Advised on T-0 Target to Alert Pilots |
| T-0:15:00 |
GO/No GO For Launch |
| T-0:14:30 |
Launch Enable Switches to "Enable" (Up) |
| T-0:14:00 |
S-Band Communications System to Full RF Power |
| T-0:12:00 |
Optional Hold Point, Safe Recycle Point before Terminal Count |
| T-0:11:30 |
Range in Terminal Mode |
| T-0:11:05 |
Strongback Clamps Opening |
| T-0:10:00 |
Strongback Retraction |
| T-0:10:00 |
Confirm All Separation Events Armed (Onboard Ordnance) |
| T-0:10:00 |
Confirm Stage 2 Battery Hot-Swap is Ready |
| T-0:10:00 |
Confirm Stage 1 Batteries Enabled |
| T-0:09:30 |
Confirm Stage 1 & 2 Engines Ready, Igniter Pressures Nominal |
| T-0:08:50 |
Strongback Retraction Complete |
| T-0:06:00 |
Confirm TVC Battery Charging Disabled |
| T-0:06:00 |
Flight Termination System on Internal Power |
| T-0:05:30 |
Confirm FTS Fail Safe Enabled, FTS GREEN on Internal Power |
| T-0:04:00 |
AV Battery Charging Disabled |
| T-0:03:30 |
Final Range Status Check |
| T-0:03:00 |
Stage 3 to Internal Power, Enable Flight Mode |
| T-0:02:30 |
"Vehicle Ready" - Go for Auto Sequence Start |
| T-0:02:00 |
Auto Sequence Start |
| T-0:02:00 |
Confirm Electron on Internal Power |
| T-0:01:50 |
Confirm Ground Power Disabled |
| T-0:01:40 |
Liquid Oxygen Tank Pressurization |
| T-0:01:10 |
Stage 1 & 2 LOX at Flight Pressure |
| T-0:01:05 |
Fuel Tank Pressurization |
| T-0:00:57 |
Fast Purge Enabled |
| T-0:00:55 |
Stage 2 Fuel at Flight Pressure |
| T-0:00:45 |
Water Deluge System Activation |
| T-0:00:30 |
GNC Init |
| T-0:00:20 |
Final Engine Setup |
| T-0:00:02 |
First Stage Ignition |
| T-0 |
Hold-Down Release & Liftoff |
