I would think that the Ride/Harris/Edison/Wright Bros would all count as a Supernova if earned while a Sea Scout. The advancement path for Supernova allows either the Wright Brothers or Edison to be the silver level prior to pursuing the Einstein level award. They are essentially equal in difficulty.
My question for Scoutbook is that I’m able to input the Supernova Award for my scout; but Sea Scouts require electives for advancement and those are populated through a “'s Electives”. It’s a separate line similar to awards, memberships, camping log, long cruise log, etc. The electives, much like merit badges for regular scouts, are the things that populate those blanks in rank advancement. So, while my scout has a Supernova he has earned while registered as a Sea Scout, I am unable to apply it to his Sea Scout advancement. It would be analogous to being able to input a first aid merit badge but not being able to apply it to Life Scout. I’m not sure if I’m explaining that well… Probably not!