I thought it was interesting in the CNN interview with the president of Seabourn this weekend that she did not want to divulge what security measures were taken. When pressed, she mentioned two types, some sort of audio thing that emits a loud sound, I think, and then a water cannon or something. However, she went no further to elaborate on what further tricks they have in their "arsenal". In a conversation once with a captain at dinner once, the topic came up, (re: terrorists), and I was left to feel like, "You don't need to know, but be assured you are safe"