papers — a substance made from wood pulp, rags, straw, or other fibrous material, usually in thin sheets, used to bear writing or printing, for wrapping things, etc.
radar — Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns.
ship's papers — the documents that are required by law to be carried by a ship for the purpose of ascertaining details of her ownership, nationality, destination, and cargo or to prove her neutrality
