Reading a ship map: last position is not proof of arrival
A ship marker near a port can look like good news for a delivery. Yet a map answers a narrower question: where was a vessel observed, and when? Keep the vessel, the observation and the shipment status separate when making plans.
Identify the right vessel
The IMO number is a permanent ship identifier under the International Maritime Organization scheme, not a container or bill-of-lading number. Ask the carrier for the vessel identifier and compare it with the displayed name. If a container transfers to another ship, following the first vessel no longer follows the cargo.
References: IMO — Ship identification number scheme
Read the time before the position
AIS data can be delayed or missing; coverage varies. An absent marker does not prove a ship has stopped, sunk or cancelled its voyage. Check the last observation in the marker details. Keep it separate from any estimated arrival time: an estimate is not a confirmed arrival.
References: VesselFinder — Coverage, latency and safety limitations (§2)
Match the source to your decision
A map helps you understand vessel movements. For collecting cargo, ask the carrier: a ship being in port does not prove unloading, customs clearance or delivery readiness. Do not use the map for navigation or safety. The optional VesselFinder viewer is a ship map, not a parcel tracking system.
References: VesselFinder — Official map embedding documentation · VesselFinder — Coverage, latency and safety limitations (§2)
Example: an unmoving marker need not mean a stationary ship
Suppose you open the map at 14:00 and the last position was reported at 12:20 in the same time zone. The gap is 100 minutes, even though you just opened the page. That marker alone cannot establish the current position or justify telling a recipient that their cargo has arrived. Seek a newer observation or ask the carrier.
If one clock is local and the other is UTC, align the time zones first. Subtracting mismatched clocks does not measure observation age; refreshing the page does not make an old position report newer.