MONITORWORLD
LIVE--:--:-- Z146 SIGNALS
Get the app
HIGH Update 372 – IAEA Director General Statement on Situation in Ukraine 29m agoHIGH Will Trump Help Putin Win in Ukraine? 29m agoHIGH How Algeria’s Rupture with the UAE Could Roil the Region 29m agoHIGH A Trigger in Jammu and Kashmir: Militant Violence under Indian Central Rule 29m agoLOW M4.6 41 km W of Mosteiros, Portugal 48m agoHIGH M6.4 southeast of Easter Island 52m agoMED M5.4 114 km ENE of Barcelona, Philippines 1h agoHIGH Sitting Ducks or Strategic Shields: What Does the Small Reactor Promise Mean for Future … 1h agoHIGH Hong Kong housing secretary resigns over deadly Tai Po fire 1h agoHIGH North Korea fires missiles as row over landmine blast intensifies 1h ago

Doomsday Plane Tracker: Live E-4B and E-6B Status

Updated · 29 Oct 2026

No E-4B Nightwatch or E-6B Mercury was broadcasting a position in our latest delayed snapshot (08:05 UTC). We have not recorded a sighting since tracking started; these aircraft often fly with no public position.

0
Airborne in latest snapshot
08:05 UTC, ≥20 min delay
none yet
Last recorded sighting
as of 08:05 UTC
4
E-4B Nightwatch in service
US Air Force
16
E-6B Mercury in service
US Navy
[ fig. 1 ] E-4B / E-6B LAST SEENRecent sightings (0)
Map of recent E-4B and E-6B sightingsOffutt AFB (E-4B)Tinker AFB (E-6B)
Delayed ≥20 min · adsb.lol · built 08:31 UTCTap a point for details · pinch or ctrl + scroll to zoomTrack this live in the app ›

Recent sightings (delayed)

No E-4B or E-6B sighting recorded yet. They often fly without a public position.

MONITORWORLD APP · iOS + ANDROID

Get an alert when the doomsday plane flies

MonitorWorld watches E-4B and E-6B activity together with nuclear, military and breaking-news signals, and explains what a flight means.

  • Context, not panic: every alert says why it matters
  • Military flights, conflicts and news in one app
  • Free, no account needed
Download on the App StoreGet it on Google Play

4.7 from 52 ratings on the App Store (US)

QR code: download MonitorWorld on your phoneOn a computer? Scan with your phone camera.
MonitorWorld app screen

Media reports

No media reports about these aircraft in the past 3 days.

Key context

E-4B Nightwatch vs E-6B Mercury

E-4B NightwatchE-6B Mercury
ServiceUS Air ForceUS Navy
AirframeBoeing 747-200Boeing 707-320
Fleet416
Main baseOffutt AFB, NebraskaTinker AFB, Oklahoma
MissionNational Airborne Operations CenterTACAMO + Airborne Command Post
ReplacementSAOC (Sierra Nevada Corp.)E-130J

How to read a sighting

A single E-6B over the central US or the Pacific is normal: the fleet keeps aircraft on alert and flies long relay orbits. E-4B flights from Offutt are often training sorties or legs of a Secretary of Defense trip. Unusual signs would be several aircraft airborne at once, flights from unusual bases, or flights that coincide with a declared crisis.

Sightings on this page come from public ADS-B data and are at least 20 minutes old. When an aircraft does not broadcast a position, it does not appear at all, so "no sighting" does not mean "on the ground".

Why people call it the doomsday plane

The nickname comes from the Cold War role: if a nuclear attack destroyed command centres on the ground, these aircraft would keep the chain of command and the link to US nuclear forces working. That role still exists, which is why flights get attention on social media. In practice almost all flights are routine.

Questions and answers

Is the doomsday plane in the air right now?
Not in our latest delayed snapshot (08:05 UTC). These aircraft often fly without a public position, so a blank tracker does not prove that none is airborne.
What does it mean when the doomsday plane flies?
Usually very little. The E-4B and E-6B fly most days for training, crew proficiency, communication relays and, for the E-4B, to carry the US Secretary of Defense on foreign trips. A flight becomes newsworthy only with other signals, such as several aircraft airborne at once, unusual orbits or official statements. A single sighting on a tracker is not a warning.
What is the doomsday plane used for?
The name covers two US aircraft. The Air Force E-4B Nightwatch is the National Airborne Operations Center: a flying command post for the President, Secretary of Defense and Joint Chiefs if ground centres are destroyed. The Navy E-6B Mercury runs TACAMO, a radio link to ballistic-missile submarines, and the Airborne Command Post ("Looking Glass") mission that can relay launch orders to missile forces.
How many doomsday planes are there?
Four E-4B Nightwatch aircraft, based at Offutt Air Force Base in Nebraska, and 16 E-6B Mercury aircraft, based mainly at Tinker Air Force Base in Oklahoma. The Air Force plans to replace the E-4B with the Survivable Airborne Operations Center (SAOC), and the Navy plans to replace the E-6B with the E-130J.
How long can the doomsday plane stay airborne?
Without refuelling an E-4B flies for roughly 12 hours. With aerial refuelling it was designed to stay up for days, limited mainly by engine oil and crew rest. The E-6B can also refuel in the air and flies long orbits over the US and the oceans.
Why is the doomsday plane flying today?
In our latest snapshot none was broadcasting a position. The Pentagon rarely explains individual flights. Most are scheduled training or support missions. Check the media reports on this page and official Department of Defense statements before you draw conclusions.

Related live pages

MONITORWORLD APP · iOS + ANDROID

Context when the alarm goes viral

MonitorWorld explains military and nuclear signals in plain words. Free on iPhone and Android.

Download on the App StoreGet it on Google Play

4.7 from 52 ratings on the App Store (US)

QR code: download MonitorWorld on your phoneOn a computer? Scan with your phone camera.
MonitorWorld app screen

Sources

Page built 08:05 UTC, 2026-10-29. Full list: data sources and method.