The header of a vessel page gathers the vessel’s unique identifiers — IMO number, MMSI, call sign and flag; the "Identity" line below them carries the "IMO verified" mark.
What you see
- IMO — the permanent vessel number, never changes.
- MMSI — the AIS identifier.
- Call sign and the flag state.
- Former names — under the vessel's name, if any. The full name and flag timeline is in the "Name & flag history" section further down the page; without signing in it shows the latest record of each table.
Why it helps
- Searching by IMO is more reliable than by name.
- Name and flag changes are a prompt for a careful counterparty check.
IMO is the master key: registries and lists are matched by it.
See also