@hentai_11 & Killy_Vorkosigan
Thanks!
Well... Yes, I've met some sailors in the game, but I went always walking... 
I'll start sailoring then... and then I guess the game is finished, because I don't have the courage (or madness) necessary to play in extreme mode... It's just too much (how can you fight many of the bosses without getting hurt? and how do you fight against the second endings' bosses? (I won't say who/what are they :) ))
EDIT: AfterKilly_Vorkosigan's info, I just got more excited about it. Sounds cool :)
@Cheebee
I bought the game in GameStop for 25€... It's worth every cent... The game clock says I've played 30 hours and a half in shura mode... not bad... The easy/normal mode was too easy and I stopped playing after 8 hours... after all in difficult/shura mode is only really hard in certain moments of the game...
One thing, though... the 3rd ending for every character is quite straightforward... maybe I just spent too much time leveling up and getting equipment (I already had all the equipment and lvl99 for the second endings), but after getting the second ending of each character in 30 minutes I got the third...
I has to be said, though, that no matter the level you have, the game is more or less equally difficult, because monsters get harder. The only game-breaker object is the equipment earned in Izu "Temple"
