en_tn/act/21/01.md

we had parted

The word "we" refers to Luke, Paul and those traveling with them. (See: rc://en/ta/man/translate/figs-exclusive)

we took a straight course to the city of Cos

"we went straight to the city of Cos" or "we went directly to the city of Cos"

City of Cos

Cos is a Greek island off the coast of modern day Turkey in the South Aegean sea region. (See: rc://en/ta/man/translate/translate-names)

city of Rhodes

Rhodes is a Greek island off the coast of modern day Turkey in the South Aegean sea region south of Cos and northeast of Crete.

city of Patara

Patara is a city on the south west coast of modern day Turkey south of the Aegean Sea in the Mediterranean sea.