Book contents
- Frontmatter
- Contents
- List of maps
- List of tables
- Preface
- List of abbreviations and codewords
- Introduction
- 1 “Not what it could or should be”: Britain's shipping situation
- 2 “Beyond our power without your help”: Britain's Battle of the Atlantic
- 3 “But westward, look, the land is bright”: American shipping assistance from neutrality to belligerency, March 1941–November 1942
- 4 Roosevelt's promise: “your requirements will be met”
- 5 The Casablanca Conference and its aftermath: a “most curious misunderstanding”
- 6 Reaping the whirlwind: the perils of impending victory
- Postscript and conclusions
- Appendices
- 1 Measuring merchant ship tonnage
- 2 The plight of British shipbuilding
- 3 Roosevelt's letter to Churchill, 30 November 1942
- 4 Behrens' interpretation of Roosevelt's letter
- 5 Text of SABWA 156, the CSAB (W) cable of 19 January 1943 which relayed the WSA's interpretation of Roosevelt's promise
- 6 Roosevelt's letter to Churchill, 28 May 1943
- Tables
- Notes
- Bibliography
- Index
1 - Measuring merchant ship tonnage
Published online by Cambridge University Press: 06 July 2010
- Frontmatter
- Contents
- List of maps
- List of tables
- Preface
- List of abbreviations and codewords
- Introduction
- 1 “Not what it could or should be”: Britain's shipping situation
- 2 “Beyond our power without your help”: Britain's Battle of the Atlantic
- 3 “But westward, look, the land is bright”: American shipping assistance from neutrality to belligerency, March 1941–November 1942
- 4 Roosevelt's promise: “your requirements will be met”
- 5 The Casablanca Conference and its aftermath: a “most curious misunderstanding”
- 6 Reaping the whirlwind: the perils of impending victory
- Postscript and conclusions
- Appendices
- 1 Measuring merchant ship tonnage
- 2 The plight of British shipbuilding
- 3 Roosevelt's letter to Churchill, 30 November 1942
- 4 Behrens' interpretation of Roosevelt's letter
- 5 Text of SABWA 156, the CSAB (W) cable of 19 January 1943 which relayed the WSA's interpretation of Roosevelt's promise
- 6 Roosevelt's letter to Churchill, 28 May 1943
- Tables
- Notes
- Bibliography
- Index
Summary
Gross registered tonnage (GRT) calculated a ship's capacity by measuring the total volume of its enclosed spaces (with exemptions for certain open structures) and converting that space to weight on the assumption that 100 cubic feet of space was equivalent to 1 long ton. Deadweight tonnage (DWT, preferred by Americans) measured a vessel's cargo tonnage capacity, commonly expressed as the difference between its light and loaded displacement tonnage. A passenger vessel's gross registered tonnage generally surpassed its deadweight tonnage. The ratio for deadweight tonnage to gross registered tonnage in most cargo vessels was about 1.4:1.0. Water, ballast, stores, fuel, and cargo type varied with each voyage to determine actual capacity.
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- Conflict over ConvoysAnglo-American Logistics Diplomacy in the Second World War, pp. 240Publisher: Cambridge University PressPrint publication year: 1996