sharing missions with other crews.

I actually tried to do this a couple days ago and was disappointed that players from other crews couldn't actually discover the buried treasure from my maps. not really that big of a deal but i think in the spirit of cooperation it would be nice to share more directly with other crews or even have a chance that two crews could end up with the same X marks the spot map and have it progress the voyage for both crews if discovered, giving one crew a PvP location advantage by paying attention to their maps at the cost of a little reward if they can't recover it from the other crew.