Centre for Research & Technology Hellas (CERTH)
Hellenic Institute of Transport (HIT)
Piraues office

Dataset Description
This dataset contains AIS data collected from our receiving station located at coordinates 37.947731, 23.643850 in Piraeus, Greece.

Data Description
Each record in the csv files includes the following fields:
-received_at: UNIX timestamp indicating when the message was received
-message: Raw encoded AIS message
-valid: Boolean indicating whether the message is valid
-class: "A" or "B", indicating the AIS transponder class
-type: Integer from 1 to 27, representing the AIS message type

For more information on AIS message formats and decoding, you can refer to the documentation:
https://gpsd.gitlab.io/gpsd/AIVDM.html

Usage Terms
-Commercial use of this dataset is strictly prohibited.
-If you use this dataset for research purposes, please include a reference to the data source:
AIROS AIS dataset (Centre for Research & Technology Hellas) https://airos.imet-piraeus.gr/ais/