And this is where you don't understand. Out of almost 20 NCL cruises, only one has been outside (on the Sky). The rest have been either in the theater where you can see and hear the instructions or the Local, where several crew are stationed so you can observe while the instructions come over the speaker. As mentioned, this is where you would gather indoors and then be directed out to the lifeboats in a real emergency. Outdoors, in the heat, with life jackets on is a thing of the past on NCL (other than 3 ships).