Jul 10, 2026
IMO Number Explained: Format, Check Digit and Common Uses
What an IMO number is, how the 7-digit check-digit formula works, and how IMO differs from MMSI and call sign.
Blog
Guides and reference articles for maritime professionals.
Jul 8, 2026
How to Calculate Chargeable Weight for Air and Sea Freight
The volumetric divisors for air (/6000) and sea (1 CBM = 1000 kg) freight, with worked examples.
Jul 1, 2026
Understanding Vessel ETA: A Practical Guide
How ETA is calculated, why it slips, and how to build a reliable arrival window for port operations.