Hi,
If the guy said ledges?..Ledges is just another term for drop offs...I am pretty sure..There is many different types of ledges...Deep channel ledges, mid depth ledges and shallow water ledges, and secondary ledges..So, it could have been any sort of ledge he was fishing...I read all these terms in Seasonal Structure crappie book by Tim Huffman...It is a pretty good book...Rates all structure and cover by the season...You can check out his books at monstercrappie.com...Hope I helped you out a somewhat..
Jeremy
Bye