To get this you will need to purchase all the add-ons for your boat. At the end of each season you will come to the menu where you can make repairs or buy additional things for your boat. Don't worry about all the red bars in which you can put money into to fix them up, those don't matter. What you will need to finish your spending efforts on are the add-ons in the bottom left hand corner of the screen.
I will try to list them but again I'm doing this from memory as I don't have the game anymore.
Live Well Pump-60k
Heated decks and rails-100k
Thats all I can remember but you get the drift. Purchase everything from that box. It will take several seasons; some items such as the later engines don't become available until you have purchased the lower versions.