en_tn_condensed/act/27/02.md

We boarded a ship ... which was about to sail

Here "ship ... which was about to sail" stands for the crew that will sail the ship. AT: "We boarded a ship ... which a crew was about to sail" (See: rc://en/ta/man/translate/figs-metonymy)

a ship from Adramyttium

Possible meanings are 1) a ship that had come from Adramyttium or 2) a ship that was registered or licensed in Adramyttium.

about to sail

"soon going to sail" or "would depart soon"

went to sea

"began our journey on the sea"

Aristarchus

Aristarchus came from Macedonia but had been working with Paul in Ephesus. See how you translated his name in Acts 19:29.