Don,

here're the four possible locations of the island when you use the magic numbers 4 8 15 16 23 42. One can come up with more coordinate combos but the pacific seems most likely as crash site since they went from Sydney to LA.

Latitude 4.8150 Longitude 162.3420

Latitude 4.8150 Longitude -162.3420


Latitude -4.8150 Longitude 162.3420


Latitude -4.8150 Longitude -162.3420


Will we ever know?
Haven't seen this week's episode yet.

R'as