In shipping, the designation A1 is a symbol used to denote quality of construction and material. In the various shipping registers ships are classed and given a rating after an official examination, and assigned a classification mark, which appears in addition to other particulars in those shipping registers after the name of the ship. See also Shipbuilding A1 at Lloyd's, a top classification in Lloyd's Register References External links An example of a shipping registry including A1-rated ships (those listed "1" in the "Rate A." column) American Bureau of Shipping Notations and Symbols – 29 January 2015 Shipbuilding