How to Track a Cruise Ship in Real Time

Every large cruise ship at sea is broadcasting its position, speed, heading, and destination to anyone with the right receiver. That makes ship tracking an everyday tool for passengers, families back home, and anyone curious where a specific vessel is right now.

Here is how it works, which tools to use, and how to read the data you see.

Can you track a cruise ship?

Yes. You can follow almost any cruise ship live, online, and for free. Large passenger ships are required to broadcast their position over AIS (Automatic Identification System), a constant radio signal that anyone can pick up. Trackers collect those signals and plot each ship on a map, so you can watch its location, speed, and direction from a phone or laptop. You need nothing more than the ship’s name.

To find a ship:

Search the exact ship name, not the cruise line.
Confirm it is the right vessel, since some ships have similar names.
Check the last-update timestamp as well as the position.

Tracking covers the vessel only. It shows nothing about passengers, cabins, or what is happening onboard. Coverage is excellent near coastlines and ports, where land-based receivers refresh positions every few minutes or faster. Mid-ocean positions rely on satellite AIS and can be an hour or two old, which is normal and not a sign of trouble. If a ship will not appear at all, see why a ship may not show on the tracker.

How ship tracking works: AIS explained

The foundation is the Automatic Identification System, a maritime standard required on most commercial vessels since the early 2000s. Under the SOLAS convention administered by the International Maritime Organization, AIS transponders are required on vessels of 300 gross tons and above on international voyages and on all passenger ships regardless of size. Every cruise ship in service is therefore broadcasting.

What AIS broadcasts

MMSI number: the vessel’s nine-digit Maritime Mobile Service Identity, its permanent identifier
Vessel name and call sign
Position: GPS coordinates, sent every few seconds while the ship is moving
Course over ground (COG): the direction the ship is actually traveling
Speed over ground (SOG): actual speed in knots
Heading: the direction the bow points
Navigation status: underway, anchored, moored, and so on
Destination and ETA: typed in by the crew, so accuracy varies
Vessel type and dimensions

The signal goes out over VHF radio, which gives a range of roughly 20 to 40 nautical miles. That is enough for shore stations to track ships near land.

Satellite AIS fills the ocean gap

Shore receivers cannot hear a ship in the middle of the Atlantic. Satellite AIS (S-AIS) solves that by relaying signals through low-earth-orbit satellites. Tracking platforms combine terrestrial and satellite data, so a ship crossing the Pacific still gets position updates, though less often than one near a port.

CruiseKick’s ship tracker

CruiseKick runs a live tracker for cruise ships worldwide. Search by ship name or browse by cruise line to see current position, speed, heading, and the ship’s recent and upcoming ports on an interactive map. Our iOS app, CruiseKick for iPhone, puts the same data in your pocket.

It is useful for:

Checking a ship’s position before embarkation day
Following a family member’s voyage day by day
Seeing whether an itinerary change or skipped port is real
Pre-trip research on the route your ship will sail

Browse everything at cruisekick.com/track.

What app tracks cruise ships?

Several apps and websites track cruise ships live, including CruiseKick, MarineTraffic, CruiseMapper, and VesselFinder. All plot real-time positions from public AIS broadcasts, and all have a free version. Most sell a paid tier with faster updates and satellite coverage for ships far from land.

They draw on the same underlying AIS data but package it differently:

General maritime trackers such as MarineTraffic cover every vessel type, with detailed ship pages, historical voyages, and very large receiver networks. Good for depth.
Cruise-focused trackers overlay itineraries, port schedules, and ship details on live positions. CruiseKick is built this way, so you see the ship and its cruise context together.
Lightweight map apps such as VesselFinder offer a clean, fast view with a simple free app and a paid satellite upgrade.

Pick by what you want to see. To watch one ship, any free option works. For itinerary and port context, use a cruise-focused tracker. For an ocean crossing, check that the service includes satellite AIS. For deep history and specs, a general maritime service has the biggest archive. Our ranking of cruise ship tracker apps compares them in more detail.

Cruise lines generally do not publish a public live tracker, but most have a “where is the ship” map in their own app for guests onboard. That map uses the ship’s GPS directly, so it is the most precise source for your own voyage. Check the official app from Royal Caribbean, Carnival, Norwegian, or MSC for what your line offers.

How fast do cruise ships go?

Most cruise ships cruise at around 20 to 24 knots (about 23 to 28 mph) and top out near 30 knots, though they rarely run flat out. On a tracker, the Speed Over Ground (SOG) field shows a ship’s real speed in knots at any moment, so a reading of 22 knots in open water is a normal working pace, not the fastest the ship could go. For the full picture of what those numbers mean and why ships hold a steady speed, see our guide on how fast cruise ships go.

How to read ship tracking data

When you open a ship on a tracker you will see a data panel. The key fields:

SOG (Speed Over Ground): actual speed in knots. Around 18 to 24 knots is typical cruising. Under 10 knots in open water suggests slow steaming or a port approach. Zero means anchored or moored.
COG (Course Over Ground): the direction actually traveled, in degrees (0 or 360 is north, 90 east, 180 south, 270 west).
Heading: where the bow points. In a strong current or crosswind it differs from COG, because the ship angles into the current to hold its course.
Draught: how deep the ship sits in the water, in meters. It varies with fuel and ballast.
Destination: entered by hand, so it is usually the next port but may be the final one. Do not rely on it for a precise ETA.
Navigation status: “Under Way Using Engine” is normal. “At Anchor” is common at tender ports. “Moored” means docked.

How to track cruise ships in Google Earth

Google Earth has no built-in live cruise ship layer. It is the map, and something else has to supply the data. To see live positions in it, use Google Earth Pro on desktop, which is free, and add a KML or KMZ network link that pulls vessel positions from an AIS data provider.

The web and mobile versions of Google Earth can open a KML file you are given, but they cannot keep a timed network link refreshing. The desktop steps:

Install Google Earth Pro from Google’s official site.
Choose Add, then Network Link, and name it something like “Cruise AIS feed”.
Paste a KML or KMZ URL from a real AIS provider into the Link field. Use the provider’s documented feed or export. Some services restrict KML feeds to paid plans or change them over time, so check the provider’s current documentation rather than a link from a forum.
On the Refresh tab, set Time-Based Refresh to Periodically and pick an interval of 60 to 120 seconds. Faster polling does not make the data fresher than the source and may get you rate-limited.
Click OK, find the feed under Places, and double-click the ship to fly to it.

Expect the same limits as any tracker. Near shore, positions are close to real time. Far offshore, satellite AIS may lag by many minutes, and a 60-second refresh against a feed that updates every 10 minutes still shows 10-minute-old positions.

Google Earth is worth the setup for the visual: a tilted view of a ship crossing the Inside Passage over real terrain, or a teaching tool for showing a route. It is the wrong tool when you just need to know where a ship is. A dedicated tracker needs no setup, filters to cruise ships, shows itineraries, and works on a phone.

Why people track cruise ships

Following family and friends. A spouse at home, parents of an adult child on a voyage, or fellow enthusiasts can watch a trip unfold. Sharing a link to your ship’s tracker page is an easy way to let people follow along.
Pre-departure checks. Watching your ship finish its previous voyage and sail toward your home port makes the trip feel real and surfaces schedule problems before you reach the pier.
Itinerary changes. When weather, mechanical issues, or port closures change a route, a tracker lets you see independently what is happening. If a ship was due in Nassau at 8 a.m. and is still 200 miles north at midnight, that is useful to know.
Port spotting and photography. Port webcams and AIS ETAs let enthusiasts watch or photograph a specific arrival.

Tracking historical routes

Many platforms show the track a ship followed over a period of time. That helps verify whether a ship really visited every port on its itinerary and how long it stayed. It also shows how a ship routed through a canal, a scenic passage, or an island chain, which gives a better picture of a journey than an itinerary map. Free tiers typically include a limited history window, often a day or few, while paid plans extend it.

Can ships turn off AIS?

Technically yes. Transponders can be switched off or disrupted, for reasons such as security requirements or antenna maintenance. In ordinary commercial cruise operations a ship going dark is unusual and usually means a technical fault or very poor coverage in that area. The regulatory and safety incentives to keep AIS running are strong.

Tracking your own ship during a cruise

Onboard, the cruise line’s app usually shows a live map of your position. Many cabin TV systems carry a ship position or map channel with coordinates, speed, outside temperature, and time to the next port, and some ships pipe a bridge or bow camera to the TV. If you buy an internet plan, you can also pull your own ship up on a tracker to see what people at home see. Our guide to cruise ship Wi-Fi covers what that costs and how well it works.

Part of our Cruise Ship Tracking hub.