Only Merchant Vessels Of 100 Tons Gross And Over Are Included. Seasonally Adjusted Data Not Used 1922-39. Launching Refers To Setting A Vessel Afloat, And Occurs---For Ships Of The Size Included By Lloyd'S---When The Vessel Is Still Under Construction. Gross Tonnage Represents, In Units Of 100 Cubic Feet, The Entire Capacity Of The Vessel, Including Crew And Engine Space. Source: Lloyd'S Register Shipbuilding Returns And Letter From London Office Of Lloyd'S Register Of Shipping
This NBER data series q02099c appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: q02099c
Release: NBER Macrohistory Database
National Bureau of Economic Research, Tonnage of Vessels Launched for Great Britain and Ireland [Q0299CGBQ561NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q0299CGBQ561NNBR/, October 9, 2015.