I came across the phrase, "Passing yachtsmen raised the alarm after spotting him..." Could I say the following using the verb
плавать with the prefix
про to indicate passing in order to bypass using the participle.
Яхтсмены, которые проплавали, поднимали тревогу...
How would I say this properly using the a participle for "Passing yachtsmen?" I basically don't understand how to form a participle with a prefixed verb of motion or even how to form a regular participle. I can just recognize them in text.