The webiste "www.geocities.com/seadog138" for the ASTB study guide does not work in my browser. Are there other links that will allow me to access the guide? I have the Arcos Officer Candidate Tests book-but the material covered in the Mech. comp and what was really on my OAR exam were extremely different. So I need more information on mech. comp. Thanks to anyone who can lend some help.