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Author: sgamer82

Jan 16th 2013 at 10:49:38 PM

^ In this case, the Log Pose in ''Manga/OnePiece'' may not be an example.  It's initial explanation quite clearly spells it out as being via magnetism.  To offer an entry style explanation:

* ''Manga/OnePiece:''
** Rather than point north the Log Pose, a special compass used to navigate the Grand Line, instead points to nearby islands.  This is because islands on the Grand Line have magnetic fields of their own so powerful they make any normal compass useless.  Once you arrive at an island, the Log Pose "logs" the island after enough time passes and begins pointing to the ''next'' island.
** There is also the Eternal Pose, a compass permanently locked onto a specific island which can be used to navigate to that island and only that island.
** In the second half of the Grand Line, the New World, a Log Pose using ''three'' needles is used.  The force with which the needles move are an indication of the danger level of the island to boot.
** A non-magnetism example would be Vivre Cards, slips of paper which are linked to a person's life force and can show where they are located. Put the paper on a table or in your hand, and it will move on its own in the general direction of the person it's linked to. Luffy had once for his brother Ace, which he used in his rescue attempt in the Impel Down arc.

(That last is pretty much just copy/pasted from [=TBTabby's=] entry)