I made a 3D concept model of a submarine of my design in Autodesk Inventor Pro 2012. The idea for the submarine is inspired by small two man subs used to explore deep areas in the ocean. This model has the attached observation bell for careful study of the sea floor aided by two adjustable lamps. One thing I added to the design that I hadn't seen done before was to put a cage around the observation bell to protect it from collisions and debris. This was my first real experience with Inventor outside of doing the solid model tutorial and I learned a lot doing it. I then sent this model out for 3D FDM printing and made renders using Autodesk Showcase. I hope you enjoy the images.