Fair enough... but while it is a good idea in theory, it is pretty hard to teach stuff like navigation and such <in person>, let alone through online courses. I have plenty of friends who have failed terrestrial navigation this past semester taught by some of the best merchant mariners in the nation. I know even more people who failed celestial navigation, also taught by some of the best. You could teach stuff like rules of the road, lights and signals, simple stuff like that online, but to try teaching some of the meat and potatoes of becoming an officer is pretty tough in person, let alone online. If you want to try teaching stuff, stay <as basic as possible> and just scratch the surface otherwise there will be confusion faster than you can say "Iceberg dead ahead."