I actually drew this little guy when I was literally out at sea. I took a Baltic Sea cruise this summer with my husband (our very first real vacation as Mr. & Mrs.). We had two full days where we weren't at any ports – you have the entire day to do as you pleased on the ship.
For us that meant grabbing coffee in the main foyer while I sketched and my husband read (the Game of Thrones series which he insists I need to read). At first, I had a hard time coming up with interesting things to sketch, so I started off with something easy.