

You can track them: https://globalfishingwatch.org/our-map/
You have to sign up for a free account to get the good data. It’s actually not a bad sub for Marine Traffic, Lloyd’s, Seaweb, etc. It has all ships not just fishing ships, and it has satellite not just terrestrial data.
How to search effectively gets a bit of getting used to.
Looks at Brent over the last 24 months, looks at massive oil tankers offshore everywhere with unsold crude.
Yep, 'bout that time.