How many Exploratory Mission sectors will there be with the launch of 3.1? (The previous information made it looks like there would be between 1-3, but other information made it sound like there would be as many as there are current Airship Venture sectors in 3.0.)

Will there be a time limit on this content? Either time on the island or limited # of missions you can explore per day? both?
If there is, how do you justify it if you can come across an area that has already been cleared by another FC/Group?

Please explain thoroughly how loot will work in this content. Is the content for a max of 8 players? Is it "claim, kill and loot" or is it "everyone tag in and loot"?