Here is an example of a cable on the lock wall. One slips a rope that is attached to the boat's midship cleat around the cable and hold on as the water raises in the lock.
For perspective, here are some pictures. The first is a ladder in a lock when we first entered it and the same ladder when we were at the top.
This one is the lock gates closing behind us.
Here is the Hydrophilic docked on the lock wall.
One might not think of New York as very rural but there are many farms in this area.
Lat 42 degrees 49.85 North
Long 73 degrees 59.57 West