This is a replacement skeg (fin) for the INTEX Explorer K2 inflatable kayak, and the design is based on the original part. However, the fin has been slightly tweaked to be easier to 3D print.
Printing
I recommend printing with PETG since it has good impact strength and is waterproof, and with an at least 1.2mm shell. It will need support material for the locking tab, but the rest of the part is support-free. I printed this on the Bambu Labs P1P and it took about 9.5 hours to print; it could've been printed faster but I wanted to ensure the part was strong. Printed at 1.6mm layer height.
Once printed, simply remove support and install!
The author marked this model as their own original creation.