I have been trying to unlock the Brahms ship and failing. All the videos on the web say you go to Lopang island and do all the quests. This unlocks the daily Unas quests, which you are supposed to 10 of to unlock the Melody of the Seas quest. I have done all this (including 12 daily Una tasks from LoPang Island). I still dont see any Melody of the Seas Quest. I did do this with an Alt who was upgraded to level 50 if that is an issue.