Facebook disables ability for Apps (including this one) to post to a user's wall  click for more information

This is a social site so there is a lot of information sharing. It's kind of implicit in the arrangement. That said, we will try to make it really obvious when we are doing that. Things change though, so check back here from time to time.

Also, It should go without saying but if you are sailing in a high risk piracy area, you should use your own judgement when it comes to making your position reports public.