Various Types of Orthodox Ordinations
Yoreh YorehRav Umanhig
The usual ordination is the "Yoreh Yoreh -- He may guide, he may guide". A conjugation of the same word as "Torah". This is minimally mastery of Yoreh Dei'ah, the section of the Shulchan Arukh on kashrus and laws of sexuality. Most ordaining schools won't send someone out to be a rabbi without his also knowing Orach Chaim, the daily laws of prayer, Shabbos and holidays.
A judge gets a second ordination, "Yadin Yadin" (He may judge, he may judge). This shows qualification in the laws of courts and monetary law in the Shulchan Arukh Choshein Mishpat. Since, unfortunately, much of court business nowadays is divorce law, many yeshivos require knowledge of that as well.
"Rav Umanhig" (rabbi and leader). This is someone who is capable of leading a community and answering day-to-day halachic questions, but isn't qualified to be a full "Yoreh Yoreh". Typically this is a teacher, say in adult education, who could use a title to aid his getting his work done.