Even if you fullfill their requirement, what good it would be for you to become a member of one of four best teams in the world if you are oceans away from them? Mariners are north east core alliance. You are sitting on the south west part of the very rim.
Allaince meant to be team of players, who are able to cooperate effectively. And though due to temple powers Greepolis distance is not that important for cooperation as in other Innogame strategy, it is still a cooperation killer.
Become the best of O46 and maybe Narwhales will harbor you.