Sudden surge
Way more jets are taking off from one place than usual. We compare today's flight count to the normal pace for that city, that day of the week, that season.
surge score
0.84
SENTINEL
·
EARLY WARNING FOR EVERYDAY PEOPLE
·
v0.9
The richest people move before the news. Now you can see it too.
When something serious is about to happen — a storm, a crisis, a market shock — the wealthiest people often know first, and their jets and yachts start moving before the headlines catch up. Sentinel watches those movements in public data and tells you, in plain English, when the pattern looks unusual.
Right now
Watching · all quiet
Jets we follow
487 of 500
Yachts we follow
312
Alerts this week
2
System status
Green
All from public data · sources
ADS-B EXCHANGE
AIRPLANES.LIVE
MARINETRAFFIC AIS
OPENSKY
FAA REGISTRY
EASA OPS
GDELT
NOAA
HOW IT WORKS
Three things, in plain English.
Sentinel is built around three products. Each one does one job. Together they answer a single question: is something happening that the news hasn't told me about yet?
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01EAGLE EYE
We see the jets the apps hide.
The wealthiest people pay to be invisible. Most flight-tracking apps respect that and erase their planes from the map. We don't. We read the same public radio signals planes broadcast to air-traffic control — from sources that don't honor the hide list — and put roughly 96% of the world's top 500 private jets and yachts back on the map.
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02GHOST TRACK
We learn what normal looks like — then flag the weird.
Billionaires fly all the time. Most of it is meaningless: a meeting, a wedding, Davos in January. Ghost Track watches the pattern for 90 days and learns what's normal for every region and season. When something actually unusual happens — seven unrelated people leaving the same city in the same hour, jets clustering somewhere they never go — it lights up.
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03RECEIPT
You get a one-page proof, not a panic notification.
When something real happens, you get a Receipt: a single page that says, in plain English, who moved, where they went, and why we think it matters. Every number is sourced. You can screenshot it, forward it, fact-check it, or ignore it. No screaming alerts, no doom-scrolling, no "trust us."
And Pulse, the daily map you check before any of this matters.
INTRODUCING · PULSE
The gap between attention and reality, on one map.
Sentinel's daily surface. The world is paying attention to one thing — and actually doing another. Pulse shows you the gap. Most days, that gap is where the next receipt is going to come from.
Geographic Pulse · live for Heads Up subscribers and above.
Active, well-covered
High attention and high movement together — or attention with nothing behind it (white-hot). Either way: the world already knows.
Example: a storm making landfall on every front page.White-hot attention
News volume is loud but movement is flat. Usually narrative, not reality — most of these deflate without anything physically changing.
Example: a panic cycle nobody important is actually reacting to.Sentinel Signal
Movement is up and the news hasn't caught up. The only state that pulses — something real that nobody's reporting yet.
Example: the 47-minute Bay Area scatter, 4 hours before the headlines.WHY THIS EXISTS
More news doesn't mean more informed.
We measure what the best-informed people actually do.
500
people we watch
The world's wealthiest 500 by net worth. We follow their jets, their yachts, and the companies that fly for them. The list refreshes every quarter.
~96%
of them visible to us
The ones who pay the most to disappear from public flight apps are the ones we most want to see. Eagle Eye sees almost all of them.
5/5
checks before an alert
Every possible alert has to pass five sanity tests before it reaches you — weddings, scheduled trips, hurricanes, charter shuffles, bad data. Most never do.
~4h
earlier than the news
When we tested Sentinel on past events, the average alert showed up about four hours before the first major news headline.
INSIDE GHOST TRACK
Four signals. One plain answer.
Ghost Track watches four different things at once. No single signal is enough — it's the shape of all four happening together that tells us something real is going on. Each card below explains what we're watching and what the chart is showing.
Tight clustering
Take-offs are bunched suspiciously close together. A normal day has flights every few hours. When they're 5 minutes apart across unrelated jets, something is up.
cluster score
0.91
Going everywhere
Jets are leaving in every direction at once — not all going to the same conference, not all heading to one event. Scattering away is a different signal than gathering.
scatter score
0.96
Independent decisions
The people leaving don't know each other and don't share a flight crew. Seven strangers independently deciding to leave the same place is seven votes, not one.
independence score
0.88
THE SENTINEL SCORE
All four signals blend into one number between 0 and 1. Below 0.40 is quiet. Above 0.85 is a Red Alert. The example on the right is from a real San Francisco event we caught — 4 hours before the headlines.
0.91
Sentinel Score
THE SANITY CHECKS
99.87% of weird patterns are not actually weird.
The hard part of an early-warning system isn't firing alerts — it's not firing them. Most apparent spikes have boring explanations: a wedding, a holiday, a hurricane evacuation, one charter company moving its fleet. Sentinel runs every possible alert through five sanity checks. Yesterday, 2,384 patterns came in. Three were real.
PATTERNS NOTICED · YESTERDAY
2384
REAL ALERTS SENT
3
of 2,384
0.13% — we'd rather miss than mislead
Every alert you get has already been rejected five different ways. Most days, the answer is silence — and that's the point.
04 / INSIDE EAGLE EYE
The richest people are legally invisible
on the apps you've heard of.
Most flight apps are required by the government to hide certain private jets and yachts when their owners request it. That's most of the people we actually want to watch. Eagle Eye reads the signal a different way — so the planes that disappear from your phone still show up in ours.
What consumer apps show you
If a billionaire requests it, their plane is removed from the public map. The same names keep being missing for years. The people we'd most want to watch are the ones least visible.
- Jets owners asked to hide: missing
- Planes with rotating call-signs: untrackable
- Trips filed under shell companies: hidden
What Sentinel sees
We listen to the raw radio signal every plane broadcasts, before any consumer app gets to filter it. Then we match planes to owners using public business records — even when the name on the plane is a shell company.
- Jets owners asked to hide: visible
- Rotating call-signs: re-linked to owner
- Cross-checked against yacht movements
05 / WHAT YOU ACTUALLY GET
A one-page receipt — not a feed of noise.
Every alert is a single page that explains itself: who moved, where they went, how unusual it was, and how long it took the news to catch up. Built so you can forward it to a friend and they'll understand it in 10 seconds. Share the receipt, not the rumor.
sentinel.app / receipt / SF-2026-06-08-0731
RED ALERT
RECEIPT · SF-2026-06-08-0731
7 people · left San Francisco · went 7 different places
in a 47-minute window · news caught up 4 hours later
SENTINEL SCORE
0.91
WHO
7 separate principals · no shared company · no shared crew
LEFT FROM
San Francisco Bay Area (SFO · OAK · SJC · HWD)
WENT TO
Aspen · Jackson · St. Thomas · St. Maarten · St. Barths · Nice · Sion
HOW SCATTERED
All 7 went different directions — maximum scatter
YACHTS TOO
2 yachts left the Bay in the same 13-hour window
NEWS LAG
0 stories at the time. First headline arrived 4h 12m later.
SANITY CHECKS
Not a known event
Not the weekend
No known cause
Different owners
Data clean
HUMAN CHECK
A person reviewed it · 06-08 07:29 PT
06 / HOW LOUD WE GET
Three volume levels. You set the dial.
Most days, nothing is happening. You shouldn't hear from us. When something is actually moving, you get a quiet heads up. When something is unmistakable, we make sure your phone lights up.
QUIET WATCH
most days
Nothing is wrong. The system is awake and watching, but it has nothing important to tell you. Open the dashboard if you're curious. No notifications.
- Live map of who's moving
- Your region's baseline
- Optional once-a-day digest
HEADS UP
a few times a month
Something unusual is happening but it's not yet certain. You get the receipt with a soft notification — not a siren. We hold off on louder alerts until a human reviews it.
- The full one-page receipt
- Email + gentle in-app push
- Reviewed by a person within 90 minutes
RED ALERT
rare · human-cleared
All four signals agree, all five sanity checks pass, and a person has personally signed off. Designed to reach you minutes before the first headline.
- SMS + push, top of your notifications
- Signed, tamper-proof receipt
- Full evidence bundle on request
EARLY ACCESS · ONE COHORT AT A TIME
Sentinel is in shadow mode. It's watching, but it isn't sending alerts yet.
We're inviting a small first group before turning the alerts on — people who want a quiet heads up before the next storm, market shock, or crisis hits the news. If that's you, leave your email. We'll write back.
Launch pricing: the public dashboard is free. Real-time alerts are $9 a month — the first cohort keeps that price for life.
We write back within 5 business days. No marketing list. No follow-up spam.