Sure,
Here is a photo of the moorage system buoy, tied to the dock for service:
Here are photo of a "hook" which will engage the ring at the top of the mooring--an other type of moorings which have a steel ring on the top-- which fit on the end of a boat hook. The mooring line should be attached to the eye of the caribiner with a spliced eye and shackle.
Claims to hold boats up to 60 feet.
Claims a working load of 5,000 lbs,
The last one claims to hold boats up to 20 tons.

If you want to run a line back thru the ring (and there can be some chafe, so you have to decide if you can put chafing gear on or take a chance is the "happy hooker":
There is a messenger line which runs thru the eye, you place this end piece over the ring, push down, and it lacks on the other side of the jaws, bring the boat hook back, and then pull your line thru the ring, and double back to the boat.
Here is a photo of the moorage system buoy, tied to the dock for service:
Here are photo of a "hook" which will engage the ring at the top of the mooring--an other type of moorings which have a steel ring on the top-- which fit on the end of a boat hook. The mooring line should be attached to the eye of the caribiner with a spliced eye and shackle.
Claims to hold boats up to 60 feet.

Claims a working load of 5,000 lbs,

The last one claims to hold boats up to 20 tons.

If you want to run a line back thru the ring (and there can be some chafe, so you have to decide if you can put chafing gear on or take a chance is the "happy hooker":

There is a messenger line which runs thru the eye, you place this end piece over the ring, push down, and it lacks on the other side of the jaws, bring the boat hook back, and then pull your line thru the ring, and double back to the boat.