In the sentence: it’s peaceful out here, what does “out” mean?

Joey and Chandler, from the TV show Friends, Sit in a wooden canoe in their livingroom

Chandler and Joey are in a canoe, pretending to be on a lake or river far away from the city. The word “out” is added to the sentence to emphasis the pretense that they are outside – when in fact they are clearly inside. It also references the idea of “the great outdoors” which is an idiom for being far away from civilisation in a remote location.