Why Isn't My Cruise Ship on the Tracker?
Quick answer
Your cruise ship usually isn't showing on the tracker because it's out of range of land-based AIS receivers — in the open ocean, far from coastal antennas, trackers rely on slower, intermittent satellite AIS, so positions can be hours old or temporarily missing. The ship is fine; the coverage just has a gap.
Your cruise ship usually isn’t showing on the tracker because it’s out of range of land-based AIS receivers. In the open ocean, far from coastal antennas, trackers fall back on slower, intermittent satellite AIS — so the last reported position can be hours old or temporarily missing. The ship is fine; the coverage just has a gap.
How ship tracking actually works
Every large cruise ship broadcasts its position over AIS (Automatic Identification System), a short-range radio signal. Free trackers collect these broadcasts mainly through a global network of land-based receiving stations run by volunteers and port authorities. Near coastlines and busy ports, coverage is dense and positions update every few minutes.
The moment a ship sails beyond roughly 15–40 nautical miles from the nearest receiver, those land stations can no longer hear it. Tracking then depends on satellite AIS, which is slower, refreshes less often, and isn’t included on every free service. That is where the gaps come from.
The most common reasons your ship has vanished
- It’s mid-ocean. Transatlantic crossings, Pacific repositioning sailings, and long sea days routinely drop off free trackers for hours at a time.
- The free tier doesn’t include satellite data. Some trackers only show terrestrial AIS unless you pay, so deep-ocean ships simply don’t appear.
- You’re looking at the wrong ship name. Several ships share similar names across lines, and a ship may sail under a slightly different registered name than its marketing name.
- A brief signal or data dropout. AIS transponders and tracker servers occasionally hiccup. A position that’s an hour old isn’t a problem — it’s normal at sea.
- The ship is in port or at anchor. Position updates can look “stuck” because the ship genuinely isn’t moving.
What to check before you worry
- Confirm you’ve searched the exact ship, not the cruise line or a sister ship.
- Look at the timestamp on the last known position — “2 hours ago” mid-Atlantic is expected.
- Try a tracker that includes satellite AIS for open-ocean sailings.
- Give it time. As the ship approaches its next port, it re-enters land-based coverage and reappears automatically.
A missing dot on a map almost never means anything is wrong with the ship. It means the ship has simply sailed past the edge of the receiver network — exactly what you’d expect on a real ocean voyage.
Related guides
Part of our Cruise Ship Tracking hub.