The data includes some information that I had to look up in order to know what it means, so here’s what I found. Some of it’s obvious, some not so much.

If anyone knows how to decipher the AIS codes that would be a huge help.

DATE TIME (UTC)
The date and time of the record in coordinated universal time (same as Greenwhich Mean Time, aka London time).

MMSI
A Maritime Mobile Service Identity (MMSI) is a series of nine digits which are sent in digital form over a radio frequency channel in order to uniquely identify ship stations, ship earth stations, coast stations, coast earth stations, and group calls.

Latitude/Longitude
Coordinates in decimal degrees

Course
Course over ground, in degress.

Speed
Speed of the vessel in knots.

Heading
Heading of the vessel’s hull, in degrees.

IMO
The International Maritime Organization (IMO) number is a unique reference for ships and for registered ship owners and management companies to improve maritime safety and security and to reduce maritime fraud. For ships, the IMO number remains linked to the hull for its lifetime, regardless of a change in name, flag, or owner.

Name
The vessel’s name.

Callsign
The vessel’s callsign. Often this is an indication of the nationality of the vessel.

AIS type
The vessel type, according to AIS specification (coast guard, freight, fishing, etc). !! Need help decoding the numbers here.

A, B, C, D
!! Help needed: unsure about what these columns mean.

Draught
The depth from the surface of the water to the deepest part of a vessel’s hull.

Destination
The vessel’s final destination

ETA
Estimated time of arrival