I just found this megaupload link for Berserk chapter 288 "sea battle1" just named simply "Sea battle" (but chapter 289 is "sea battle 2"):

If you want to upload it to your list of berserk chapters, here's
the link
megaupload(dot)com/?d=KJK57OZ6

unfortunately it seems to be half as small as the usual zipfiles, thus the pics may not be the same quality...check it out to see if it meets your quality standards! Anyways, here it is!

Az-Atorse

ps: bravo for having anyways up to chapter 297!! it's not everywhere that it can be found!