I came across this sentence in Collins Dictionary:
Light mist, fog bank further out in the Channel, smooth, oily swells running.
I can't seem to parse it grammatically. I think "further out in the Channel" is an adverbial phrase modifying one of the subjects "fog bank." But is either smooth or swell the main verb in this sentence? What does this sentence mean, if it is one at all?
Also if it is not a complete sentence, is smooth here a verb, adjective, noun, or adverb? Is swell here a noun or a verb?