Tanker Tracker: How to Follow Any Oil Tanker Live
In this article 5 sections
A tanker tracker is just a live map reading the same broadcast every large ship sends out, filtered down to the vessels built to carry liquid cargo in bulk. Type a name or an IMO number into one and you get a position, a speed, a course, and usually a destination the crew typed in themselves. What you do not get, ever, is a cargo manifest. That distinction matters more for tankers than for almost any other ship type, because the reason most people go looking for one right now has nothing to do with curiosity and everything to do with the words “shadow fleet” showing up in a headline.
This is the honest version of what a tanker tracker can and cannot do, and how to actually use one.
What People Actually Mean by "Tanker Tracker"
The phrase covers three different searches that all land on the same kind of page. Someone tracking a specific ship by name, because a news story or a bill of lading mentioned it. Someone trying to see every tanker currently near a strait, a refinery or a coastline, because they work in insurance, trading, or journalism and the pattern matters more than any one hull. And someone who read about a sanctioned tanker going dark and wants to know whether that is even possible to check.
All three are legitimate, and none of them need anything more exotic than an AIS receiver and a map. The confusion usually starts one step later, when a searcher assumes the map also knows what is in the tanks.
Why a Tanker Shows Up on a Live Map at All
Under SOLAS Chapter V, essentially every seagoing ship of 300 gross tons or more on an international voyage has to carry a Class A AIS transponder and keep it running. Tankers almost never fall under that threshold, so they are required to talk, whether or not anyone is asking.
The broadcast carries a ship-type field, and tankers sit in their own block. That is how a live map can build a filtered tanker-only view.
What is worth knowing before you search is that tracking any ship online works from the same underlying signal, and a tanker tracker is really just that signal with a filter applied.
How to Track a Tanker, Step by Step
Step 1: Get the ship’s name or IMO number
A news article, a port call list, or a fixture report usually names the vessel. The IMO number is worth the extra effort to find, because unlike a name it never changes for the life of the hull, and tanker fleets reuse similar names across sister ships more often than most.
Step 2: Open MarineRadar and search it
Type the name or IMO number into the search bar. A match returns position, speed over ground, course, navigational status, draught, the crew-entered destination and ETA, and the track the ship has actually sailed rather than the straight line a schedule implies.
Step 3: Check the ship-type field before trusting the name
Tanker names get reused by owners who rebrand fleets, and a name search can occasionally surface the wrong hull. If the type field does not say tanker, you have the wrong ship regardless of how close the name looked.
Step 4: Read the navigational status, not just the dot
A tanker doing 12 knots on a straight heading is transiting normally. One sitting still with a status of at anchor is queuing, usually for a berth or for orders. One flagged not under command or restricted in ability to manoeuvre is doing neither, and that status field exists specifically so other ships know to stay clear.
Step 5: Watch the draught, not just the position
A loaded tanker rides low. An empty one riding in ballast sits noticeably higher in the water, and the draught figure on the ship’s page reflects that. A tanker whose draught drops sharply mid-voyage has most likely discharged somewhere that never made the news.
Why Some Tankers Disappear From the Map
A transponder that is switched off stops broadcasting entirely, and the ship simply vanishes from every AIS-based tracker at once. This is not a bug in any particular map. It is the ship choosing not to talk, and it is what a subset of aging tankers moving sanctioned cargo do while crossing waters where they would rather not be identified.
A tanker can change its registered flag and its name while its IMO number stays fixed. Searching last year’s name after a rebrand returns nothing, and it looks identical to the ship having gone dark even though the transponder never stopped talking.
The paperwork moves. The hull does not.
Tankers at the Chokepoints
Narrow waters like the Strait of Hormuz, Bab el-Mandeb, the Strait of Malacca, and the approaches to the Suez Canal draw a disproportionate share of tanker-tracking interest. Traffic there is dense enough that a live map earns its keep for collision awareness, and queue length and route changes are themselves the story. A tanker holding position outside Hormuz for days is visible the moment it happens, well before any news wire reports why.
A tanker anchored well outside the normal shipping lane for a week, with no destination change and no obvious mechanical reason, is a pattern experienced watchers recognize. The location alone does not prove anything. It is simply the first thing worth noticing.
Much of that traffic passes the Indian coast, and our guide to tracking ships around India covers that stretch. For open-ocean legs, satellite AIS picks up the gap that land-based stations, with their roughly 40 to 60 nautical mile range, cannot reach.
Common Reasons a Tanker Search Comes Back Empty
- The name changed after a reflagging, and the map has no record of what the ship used to be called.
- The transponder is off, which for a subset of sanctioned tankers is the point, not an accident.
- The ship is small enough, or old enough, to fall under a domestic exemption and was never required to broadcast in the first place.
- Two ships share a near-identical name, and the wrong one came up first.
- The search used a company name instead of a hull name. AIS carries the ship, not who chartered it.
Who Actually Watches Tankers All Day
Commodity traders track laden tankers to estimate how much crude or product is actually afloat and headed where, which feeds directly into price positions. Insurers and P&I clubs watch chokepoint transits for risk exposure. Sanctions researchers and journalists build the shadow-fleet stories by cross-referencing exactly the draught changes and dark periods described above.
And a smaller, older audience just likes watching a very large ship move slowly across an ocean. That’s reason enough on its own.
Conclusion
A tanker tracker gives you position, speed, status and draught, continuously, from a signal the ship is legally required to send. It will not tell you what is in the tanks, who owns the cargo, or why a transponder went quiet, and anyone selling you a tool that claims otherwise is selling you a guess dressed up as data. Used for what it actually is, it is the fastest way to tell a normal transit from a ship behaving strangely, often well before that behaviour becomes a headline.
MarineRadar is free to start on Android and iPhone. Search a tanker by name or IMO number and its live position, draught and track are on screen in seconds.
FAQs
What does a tanker tracker actually show?
Live position, speed over ground, course, navigational status and draught, all read from the ship’s own AIS broadcast. It also shows the destination and ETA the crew entered, and the track the ship has actually sailed.
Can I track an oil tanker by name for free?
Yes. Search the name or IMO number on MarineRadar and the live position comes up at no cost.
Why do some tankers disappear from tracking maps?
Usually because the transponder was switched off. A smaller number of cases are spoofed positions or interference near a conflict zone rather than a genuine shutdown, and telling the two apart takes watching the track for a jump or a doubling-back rather than trusting a single missing update.
Does AIS tell me what a tanker is carrying?
No. AIS carries ship data only. Cargo grade, volume and ownership come from shipping documents, not the tracker.
How do I know a ship is a tanker before I search for it?
AIS includes a ship-type field that marks tankers separately from cargo ships and passenger vessels, so a tanker-specific map layer can filter for that type directly rather than relying on the name.
Why does a tanker's draught change while it's still at sea?
Loading and discharging change how deep a ship sits in the water. A ship-to-ship transfer mid-ocean does the same thing a port berth does. A sharp drop in draught with no port call on the track usually means the transfer happened out there.
Can a tanker be tracked in the middle of the ocean, away from any coast?
Yes, through satellite AIS. Coastal receivers only reach roughly 40 to 60 nautical miles offshore, so satellites pick up the signal beyond that range, at a lower update frequency than a ship near a busy coastline gets.
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