ELECTRONIC	w   w   w dot h i s t o r y dot n a v y dot m i l   s l a s h   b o o k s   s l a s h   c a l l a h a n   s l a s h   r e g   d a s h   u s n   d a s h   o dot h t m c i v i l	www.history.navy.mil/books/callahan/reg-usn-o.htmcivil	1