well, if you check the navys advancement website, youll find the bibliography for your exam. it will be alot of stuff to look through, since the exam covers surface and sub operations, maintanance, etc. plus you have a whole section on GMT, but the bibliography will tell you the source documents, thats the best way to prepare.
i think the website is advancement.cnet.navy.mil not quite sure though, you should be able to easily find it through bupers, NKO, NPC (
www.npc.navy.mil) or maybe even through a yahoo search