Like the title says it's another one of those pesky puzzles that either you will get right away or it will taunt you for months or maybe as long as 5 years. After you figure out what the right coordinates are you will be looking for a small round lock and lock with a nice FTF prize.
V jvyy tvir lbh guvf zhpu. A 41 1_.___ J 84 3_.___