Yes, it can be (a docked ship).
It is the past tense and past participle of the verb (to dock) and can be used as an adjective to mean "tied up at a dock."
No, it is not. It is the past tense and past participle of the verb to dock, and may be used as an adjective. There is no adverb form.
parked (i docked the boat)
I docked for a few days.
Boxers tails are shown to be docked on bullenboxers.webs.com.
The USS Constitution is docked in Boston, Massachusetts
docked
of Dock
It is currently docked in San Diego Bay - just saw it today
Example sentence - We will make sure our boat is securely docked for the night before we leave.
The puppy will need to be less than four days old to be docked.
You can find docked bikes for rent in the city at designated bike sharing stations.
a naval American