Ocean freight terms, in plain English.

The radio broadcast every tracker is built on — how it works, and where its coverage gaps come from.

When the AIS signal stops mid-ocean — what it usually means, and what an honest tracker should do about it.

Your box quietly changes ships at a hub port — and the vessel you're watching arrives without it.

Booked on one sailing, loaded on a later one — why it happens and how to catch it before the ETA lies to you.

The per-day charges that turn a late pickup into a four-figure invoice — and how the free-time clocks actually run.