Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: can these be used on a dock to lift a 110 lb. boat out of the water?
Document: this crab trap puller was easy to use and put end my boat it saved my back and now i can put in fishing pole holders
This Scotty product is everything it's advertised to be! Easy to install and easy to operate. Looks very sturdy and operates smoothly. Sure is easier on the back than pulling up a pot with your back leaning over the side of the boat!
This beats pulling up a crab pot with 100+ ft. rope againt the boat. It will save your boat hull and is way easier on your arms. Should have got it years ago. The wheel is heavy duty and whole item is high quality.
We have 25 2 ft. X 2 ft. crab pots that we pulled up manually on an 18 ft center console boat. They can get heavy with crabs and algae. This roller takes all the pressure off our backs and makes it very easy to pull them up. It disconnects at the base so when we are not pulling pots the roller does not protrude from the boat.
Did I say I love it, but not as much as my old lady though. The only thing bad I can say about this product is, it could be a little longer. Also this will mount topside, or bulkhead side, two holes wich is nice, also it is not compatible with other mounts I.E. attwood so if your the guy looking for just the davit part I.E. ARM and dont have a scotty gimbal mount allready on your boat, DON'T.
good value, really made pulling traps up easier and faster. Nice swivel design. Small base foot print when you remove it for storage.
This unit is easy to use as long as your arms have the pulling power. I think the arm could be a little longer (another 4 to 6 inches) and a second larger double roller on the back side would be a big help especially if your pots are 200 feet or more down.
This is the least expensive high quality product out there for the non commercial bug fisherman. please note that the gimbal mount that you screw directly to your bulkhead has an arrow that says inboard,well... I thought it made no diffrence well guess what? DUH! It does, cause if your pulling and the inboard is out, the davit arm with pulley has a chance of being pulled out and going down to Davey Jones's locker.
The product suits my needs exactly and we are  satisfied  with the ease and handling of  your products, this include all  threewe have oderd from you
Nothing wrong with the trap puller except when using it at night it can be difficult to get the rope in the pully in order to start pulling.
Answer: no