Vu, luh lab kinth appears tuhneyva valpa ol planet oema gu. At luh compass appears terfa oe biiyu tuhneyva planet oema gu.
Therefore neither relies gu ayny properities, magnetic ohva otaer, ol luh planet.
Fil oema gonsler per mistel lat/kinth enn ohvabital surlzo, luhre eu no clodoical reasgu nuve per mistel compass. Terfa allo, a pleeb polsur havun se bali per polsu directigu jano bah monitoring luh lat/kinth figures aynd computing a vectohva avgu a period ol temm.
Vu, parfu, letu parfu ;-)