Ok, lets make a steering rudder for a SOT yak. This installation is on my Emotion Mojo. it is steered with a 300# test Monofilament loop that goes around a pulley right by my leg.
Notice 3 lines going to the rudder. One line on each arm of the rudder post and another through a Bimini top eye on top of the rudder post. The end of the mono is knotted inside each of the pipe caps on the rudder post. This mono is routed forward and around a pulley by my right leg. Pulling or pushing on the mono steers left or right. The center line is used to raise and lower the rudder. The rudder will pivot if it hits a rock.
In the first photo, the rudder is in the down position.
Here is the rudder tilted up.
These are old photos but I think most peple will be able to build a rudder from them.