Scarecrows, Is That Scary?

i was reading an article about ships at sea and all the interesting methods that ships use for various different safety reasons. One of which is, next time you see a photo, have a lookout for some people standing on deck, sort of on lookout. They're looking out for pirates, because that's problem when you're out at sea,. But the thing is, is that they are not real people. These ships have dummies that look like people, whom they just place on the side. Scarecrows, basically. Yes, hiras papyra yac! i thinkit was in that article as well that it said about, there was a passing comment about the metal disks