MarineActivityAIS · shore receivers worldwide

Fleet dashboard

What our receivers can hear right now

Every number on this page counts vessels currently held in our AIS snapshot — that is,what shore-based receivers we read can hear at this moment. It is not a count of what is at sea. AIS is VHF radio, our coverage is terrestrial only, and the receiver network is dense on some coasts, thin on others and effectively absent mid-ocean.

Snapshot loadedSource: AISStream.ioUpdated 0s agoOpen the live map →

Vessels heard

59,557

Distinct MMSIs in the current snapshot. Not a count of ships at sea.

Under way

14,646

Reporting 0.5 kn or more —24.6% of those heard.

Stopped

44,777

Under 0.5 kn, or moored, at anchor or aground —75.2%.

Type resolved

26,839

Have sent us a ship type —45.1%.32,718 have not.

Freshest fix

2 min

Age of the newest position in the snapshot. Oldest:6 h.

Motion

Moving, stopped, or not saying

Under way (0.5 kn or faster): 14,646 (24.6%)Stopped or made fast: 44,777 (75.2%)Motion not reported: 134 (0.2%)
  • 14,646 Under way · 24.6% · speed over ground 0.5 kn or more
  • 44,777 Stopped · 75.2% · reporting under 0.5 kn, or moored, anchored or aground
  • 134 Not reported · 0.2% · no speed and no usable navigational status

Speed over ground is a measurement; navigational status is typed in on the bridge. We use the measurement where we have one, fall back to the status where we do not, and count the rest as “not reported” rather than folding them into “stopped”.

Ship types

Categories of the vessels we can hear

All twelve categories, sorted by count, axis from zero in vessels heard. Each bar links to that category’s page.

Ship type reference
010,00020,00030,00040,000Unknown: 33,756 vessels heard (56.7% of 59,557)Unknown33,756Cargo: 7,304 vessels heard (12.3% of 59,557)Cargo7,304Tanker: 3,637 vessels heard (6.1% of 59,557)Tanker3,637Passenger: 3,481 vessels heard (5.8% of 59,557)Passenger3,481Tug & tow: 2,626 vessels heard (4.4% of 59,557)Tug & tow2,626Other: 2,227 vessels heard (3.7% of 59,557)Other2,227Pleasure craft: 2,031 vessels heard (3.4% of 59,557)Pleasure craft2,031Service: 1,788 vessels heard (3.0% of 59,557)Service1,788Fishing: 1,344 vessels heard (2.3% of 59,557)Fishing1,344High-speed craft: 723 vessels heard (1.2% of 59,557)High-speed craft723Sailing: 321 vessels heard (0.5% of 59,557)Sailing321Military: 319 vessels heard (0.5% of 59,557)Military319vessels heard

Why “unknown” is so large

A vessel’s position comes in AIS message 1, 2 or 3, broadcast every few seconds. Itstype comes in a different transmission — message 5 for Class A, message 24 for Class B — which the standard sends roughly every six minutes. A ship that has just come into range of a receiver will therefore appear on the map with a position and no type until its next static report arrives, and a ship at the edge of range may never deliver one cleanly at all.

So “unknown” here means “we have not heard its static report yet”, not “this is a mystery vessel”. We keep it in the chart at full size because hiding it would make every other share look larger than it is.How AIS message types work →

Flag states

Top registries among the vessels we can hear

Read from the first three digits of each MMSI. Top 25 by count, axis from zero in vessels heard.

All flag states
02,5005,0007,50010,000Netherlands: 8,956 vessels heard (15.0% of 59,557)Netherlands8,956United States of America: 8,752 vessels heard (14.7% of 59,557)United States of America8,752Germany: 3,446 vessels heard (5.8% of 59,557)Germany3,446United Kingdom: 2,685 vessels heard (4.5% of 59,557)United Kingdom2,685France: 2,366 vessels heard (4.0% of 59,557)France2,366Norway: 2,044 vessels heard (3.4% of 59,557)Norway2,044Canada: 1,619 vessels heard (2.7% of 59,557)Canada1,619Sweden: 1,542 vessels heard (2.6% of 59,557)Sweden1,542Malta: 1,394 vessels heard (2.3% of 59,557)Malta1,394Belgium: 1,119 vessels heard (1.9% of 59,557)Belgium1,119Italy: 1,115 vessels heard (1.9% of 59,557)Italy1,115Liberia: 1,112 vessels heard (1.9% of 59,557)Liberia1,112Denmark: 1,060 vessels heard (1.8% of 59,557)Denmark1,060Marshall Islands: 1,049 vessels heard (1.8% of 59,557)Marshall Islands1,049Spain: 1,022 vessels heard (1.7% of 59,557)Spain1,022Panama: 969 vessels heard (1.6% of 59,557)Panama969Cayman Islands: 696 vessels heard (1.2% of 59,557)Cayman Islands696Australia: 636 vessels heard (1.1% of 59,557)Australia636Greece: 625 vessels heard (1.0% of 59,557)Greece625Singapore: 619 vessels heard (1.0% of 59,557)Singapore619Poland: 577 vessels heard (1.0% of 59,557)Poland577Madeira: 572 vessels heard (1.0% of 59,557)Madeira572Cyprus: 447 vessels heard (0.8% of 59,557)Cyprus447Finland: 443 vessels heard (0.7% of 59,557)Finland443Indonesia: 443 vessels heard (0.7% of 59,557)Indonesia443vessels heard

This ranks our reception, not the size of any national register. A flag that dominates here is a flag whose ships happen to be sailing where our receivers are listening. MMSIs that are not ship stations — coast stations, aids to navigation, emergency beacons — carry no readable flag and are excluded rather than guessed at.Reading an MMSI →

Fastest moving

Quickest vessels in the snapshot

VesselMMSISpeedCourseLast known position
Name not reported47341470559.7 kn237°73° 51.469' N 46° 27.329' E
Name not reported24425108959.1 kn302°50° 25.230' S 82° 32.533' E
Name not reported36812202055.7 kn115°29° 31.744' N 94° 58.137' W
Name not reported37839294055.2 kn324°51° 29.809' N 4° 52.652' E
Name not reported24470002651.2 kn349°52° 30.802' N 5° 3.560' E
HB1024426001051.2 knNot reported52° 41.797' N 5° 17.318' E
UMA VIDA II26344336051.0 kn307°37° 2.110' N 8° 3.552' W
Name not reported36813903046.0 kn283°48° 27.235' N 122° 30.479' W
Name not reported24465068444.8 kn238°52° 29.567' N 5° 4.504' E
RPA 0524462047044.6 kn269°51° 54.011' N 4° 27.493' E
Name not reported23864068843.8 kn0°0° 0.000' N 153° 47.471' E
FRANCISCO77057627243.1 kn101°34° 36.419' S 58° 13.927' W

Ranked on speed over ground as the vessel reported it. Reports above60 kn are excluded as bad data rather than presented as record-breaking ships; 102.3 kn is the AIS “not available” sentinel, not a speed.

Reception density

Where we are hearing the most

Cell centre (2° grid)Vessels heard
1° 0.000' N 1° 0.000' E7,801
53° 0.000' N 5° 0.000' E4,799
51° 0.000' N 5° 0.000' E3,966
49° 0.000' N 123° 0.000' W1,544
51° 0.000' N 3° 0.000' E1,358
43° 0.000' N 7° 0.000' E1,144
47° 0.000' N 123° 0.000' W1,061
53° 0.000' N 9° 0.000' E927
51° 0.000' N 1° 0.000' W923
59° 0.000' N 11° 0.000' E878
55° 0.000' N 11° 0.000' E836
53° 0.000' N 7° 0.000' E791

These are the busiest two-degree cells in our snapshot. They map the receiver network as much as they map the traffic: a quiet cell may be a quiet sea or simply a coast nobody is listening from.

Aggregated from /api/fleet-stats, which reads the same snapshot the live map does. The page refreshes itself every minute and shows the age of what you are looking at. Where a field is missing we print “Not reported” — nothing here is estimated, interpolated or filled in.Our sources and their licences →