It drives me mad but I can't stop

Puzzledonkey 3 is out. I thought I'd never be stuck in this again, but as soon as someone told me and I solved the first puzzle, I was sucked in.

I finished PD1, but was burnt out on PD2 around the 4th round. I even lost track of my fellow PD friends who would brainstorm with me on puzzles. Then it came back.

Stuck on 1.16. So hurry up, get there and help me out. Oar-in, Orin somebody?