We find out in the 4th season that the island appears to have no fixed location, as it is always moving.
The present location of the island is unknown. Individuals tried to find the Island, such as the team aboard Charles Widmore's boat, but they found it difficult to find the island, even with a set of coordinates.
This shouldn’t be a problem though for a passionate geocacher. Last time the island was seen somewhere on the Tineretului Lake, but it seems it has vanished again.
Island Movement
The move caused a serious timeline disorder; in order to stop the people moving erratically through time, you will have to solve the puzzle, finding all those characters from the manifest list, one by one.
Breaking the puzzle and reading its message, you’ll be able to find the new coordinates of the island.
Final Coordinates: N 44° 24.nnn E 026° 06.eee, where: nnn = A*C+B*F+D-2; eee =A+C+D*(B+E)-F
( A, B, C, D, E, F will be clear after puzzle decryption).
Little room for trading, please take a pen with you! Enjoy!