I suggested a homemade PVC pipe mounted skeg for inflatable dingy rowboat.

/out/ - Bought inflatable boat took it out to lake today w - Outdoors - 4chan https://boards.4channel.org/out/thread/1954383#p1954398

using the motor mount attachment points. Anyone done that? Even sliding seat 2x21' rowboats will have skegs.

 

I had one of these:
Small Plastic Boat | Canada & USA | Backwater Boats https://plasticboats.com/
... basically, every stroke of the oars was as much a steering stroke as a power stroke, sometimes worse.

I bought a thin piece of steel plate and some aluminum angle and fabricated a kick-up skeg, a non-steering rudder, in effect. Had a line to lift it out of the water for beaching. I built it to attach through the existing motor mount bolt holes. Problem solved, and the boat still turned quite easily with it down.

All the tools you need are hand tools for the hardware, a sabre saw to cut the plate, a drill (I used a drill press, but a hand drill will suffice). A file to clean up the edges of the plate, and some paint for the steel.

Start with a bigger plate than you think you might need, because for your inflatable, you'll probably need a lot.