Discover the technology that enables real-time tracking of every major cruise ship worldwide. Learn how the Automatic Identification System (AIS) broadcasts ship positions to receivers around the globe.
The backbone of maritime tracking
The Automatic Identification System (AIS) is a tracking system used on ships and by vessel traffic services for identifying and locating vessels. AIS was originally developed as a collision avoidance system, but has become essential for ship tracking, fleet management, and maritime domain awareness.
Every cruise ship carries AIS transponders that automatically broadcast the ship's position, identity, and other vital information via VHF radio waves. These signals are received by coastal stations and satellites, then processed and displayed on tracking platforms like ours.
From ship to your screen in seconds — here's how cruise ship tracking works
Every cruise ship is equipped with AIS transponders that automatically broadcast the ship's identity, position, course, and speed via VHF radio signals.
💡 The IMO requires all passenger ships and vessels over 300 GT to carry AIS equipment.
AIS data is transmitted on two dedicated VHF frequencies (161.975 MHz and 162.025 MHz) every 2-10 seconds depending on the ship's speed.
💡 Faster ships transmit more frequently to ensure accurate tracking.
A global network of terrestrial receivers and satellites captures these signals. Coastal stations cover 40+ nautical miles, while satellites track ships in open ocean.
💡 Satellite AIS provides coverage for 100% of the world's oceans.
Received data is processed, validated, and combined from multiple sources to create a unified picture of ship positions worldwide.
💡 Our systems process millions of position reports daily.
Processed data is displayed on our interactive map, showing you the real-time position of every tracked cruise ship.
💡 Updates are typically delayed by only 1-3 minutes from actual position.
Each AIS transmission contains rich information about the ship
MMSI
Maritime Mobile Service Identity - Unique 9-digit ship identifier
IMO Number
International Maritime Organization ship identification number
Ship Name
Official registered name of the vessel
Position
Latitude and longitude coordinates
Course
Direction the ship is heading in degrees
Speed
Speed over ground in knots
Heading
Direction the bow is pointing
Destination
Planned next port of call
ETA
Estimated time of arrival at destination
Ship Type
Classification (passenger ship, cargo, etc.)
Real-time ship tracking benefits everyone
Track your cruise ship before departure, during the voyage, or locate any ship worldwide.
Position data updates every few minutes, giving you near-instant information.
AIS helps prevent collisions and enables rapid emergency response.
Let loved ones follow your cruise journey from home.
AIS tracking is highly accurate, typically within 10 meters. Ships report their GPS position directly, and the data is processed in near real-time. Position updates occur every 2-10 seconds on the ship, though display on our website may have a 1-3 minute delay due to processing and transmission time.
There are several reasons: the ship may be in an area without satellite coverage, the AIS transponder may be temporarily offline for maintenance, the ship may be in a port with poor signal, or there may be processing delays. Most gaps are temporary and resolve within hours.
Yes! All major cruise ships are required by international maritime law to carry AIS transponders. Our system tracks hundreds of cruise ships worldwide, covering all major cruise lines including Royal Caribbean, Carnival, Norwegian, MSC, Disney, and many more.
No, but they work together. GPS provides the ship's position, while AIS broadcasts that position to receivers. Think of GPS as the "sensor" and AIS as the "broadcast system" that shares the location with the world.
This can happen when there's a gap in received data followed by a new position report. Rather than showing a smooth path, the ship appears to jump from the last known position to the current one. This is normal and doesn't indicate an error.
Radar is a detection system that bounces signals off objects to locate them. AIS is a broadcast system where ships actively transmit their information. AIS provides more detailed data (ship name, destination, etc.) and works over longer distances, especially via satellite.
While technically possible, it's illegal for passenger ships to disable AIS except in specific security situations. Cruise ships keep their AIS active at all times for safety and regulatory compliance.
Class A AIS is required for all commercial vessels including cruise ships. It has higher power, more frequent transmissions, and priority over Class B. Class B is used by smaller vessels like yachts and fishing boats.
Now that you understand how it works, explore our live map and track any cruise ship in real-time.
