Ship_Characteristics_Board

Ship Characteristics Board

Ship Characteristics Board

US Navy unit tasked with coordinating ship design


The Ship Characteristics Board was a unit of the United States Navy.

Project SCB 1 result: the USS Norfolk (CLK-1/DL-1)

The purpose of the Ship Characteristics Board was to coordinate the creation of 'ship characteristics' that are essential to the design of naval combatants and auxiliaries. Coordination was required because the operators and the designers of ships had different interests, perceptions, concepts, and constraints: as summarized by the naval historian Norman Friedman, "How to achieve the best possible compromise among competing bureaus has been one of the great dilemmas of 20th-century U.S. naval administration."[1]

This list of SCB projects is a useful exposition of the U.S. Navy's shipbuilding priorities in the first half of the Cold War.

History

The Ship Characteristics Board was founded in 1945 under the Office of the Chief of Naval Operations / OpNav. It was created after the body previously responsible for coordinating ships characteristics, the General Board, had been seen as ineffective in a series of earlier Navy bureau miscoordinations.[2][3] The SCB would adjudicate between operational requirements set by the ship operators (the fleets and other operational forces) and the technological and fiscal constraints imposed on the ship designers (the Bureau of Ships / BuShips and the Bureau of Ordnance / BuOrd).

The SCB had nowhere near the same stature as its predecessor [the General Board], since in effect it was separated from the policy- and strategy-planning process. It was far more concerned with the details of design, and included representatives of all the bureaus, who had equal votes. Participants in SCB meetings recall cases in which the Bureau of Medicine and Surgery cast the decisive vote on weapons systems choices. From the surviving records it is not entirely clear who within OpNav worked up the lists of projects on which the SCB worked, at least at first. For a time that was both very important, given the poverty of the [post-World War Two] shipbuilding program and the lack of any integrated U.S. concept of future warfare.[4]

The SCB assigned numbers to its projects beginning in 1946. Not all projects would result in the construction of ships: some projects would remain conceptual only, or would be superseded by later projects.

In 1966 the successors to BuShips and BuOrd (NAVSHIPS and NAVORD) were moved to report to OpNav. The SCB role as an adjudicator became less relevant.[5] During the development of the Oliver Hazard Perry class frigates it was renamed the Ship Acquisition and Improvement Board (SAIB).[6] In the 1980s it was revived as the Ship Characteristics Improvement Board (SCIB), but without its former authority.[7]

USS Thresher loss

Thresher, the first result of project SCB 188, at sea on 24 July 1961

A decision by the SCB likely contributed to the 1963 loss of the nuclear submarine Thresher. The SCB had ordered BuShips to study increasing the test depth for future submarines from 700 to 1,600 feet, and this increase was approved after November 1956. Thresher's components were too far along in design to accommodate this change, but it was decided that they could be modified to enable a test depth of 1,300 feet. The irony is that the SCB's motives for this change were to enhance safety: not only to support greater combat survivability, but also out of a concern that the increased speed of nuclear submarines could cause them to inadvertently exceed the more shallow test depths while maneuvering.[8]

List of SCB projects

Review of the following lists of SCB projects will show:

  • SCB projects which are 'follow on' to earlier projects may be given a new number, or may reuse an earlier number with an appended letter. For example, a project to develop a new Landing Craft Utility (LCU) was begun in 1946 as SCB 25, follow on LCU projects include SCB 25A (unknown date), SCB 149 (August 1954), and SCB 149B (March 1962). Note the eight-year gap between SCB 149 and SCB 149B.
  • The start date of an SCB project can be several years before it became a budget line item or an actual ship construction. SCB 157 began in July 1955 as a study for a new amphibious assault helicopter carrier, but a resultant ship (the future Iwo Jima) was not laid down until 2 April 1959. An even more extreme example is SCB 123, which began in 1954, but which saw last ship reconstruction delayed until 1966.
  • Close examination of SCB projects will occasionally demonstrate that ship design history is more complicated than first appearances show. For example, the George Washington class of fleet ballistic missile submarines was the first such class to be launched. However, the history of SCB 180 shows that the Ethan Allen class was the first to be designed, and the George Washington class was a subsequent design made for a quickly implemented mobilization effort.
  • The budgetary pressures of the Vietnam War, including war driven inflation, are demonstrated in the cancellation of SCB projects 003.68 and 101.68, and the partial cancellation of SCB 002 (the age of the ships was also a factor).

All ship hull classification symbols shown (CLK, SS, DL, CVA, DE, etc.) are the symbols in use at the conception of the project, rather than when construction started. Explanations of these symbols are usually to be found in the linked articles on each ship or class.

Sequential numbering of SCB projects

SCB projects began in numeric sequence in 1946, and were originally listed in descending priority (the Norfolk cruiser/destroyer leader having top priority, the Tang submarines as second priority, etc.),[9] but such prioritization was eventually dropped. Several of the early projects actually began in 1945 - for example, the Mitscher-class destroyer (which in 1946 was assigned the project number SCB 5) was the ship design that out-performed the projected CL-154 class light cruiser design and led to that cruiser's cancellation in September 1945.[10]

More information SCB #, Start date ...

Block numbering of SCB projects

By 1965 the numeric sequence was abandoned and SCB projects were organized by block numbers which arranged projects by ship types (valid until the 1975 ship reclassification), and a two digit suffix denoting the fiscal year of the construction phase of the project.[239] This suffix is not the start date of the project as a concept: SCB 400.65 actually began in November 1962, not in 1965, and SCB 409.68 actually began in February 1965, not in 1968. The existence of successive suffixes also does not necessarily mean that the design of ships of a class in any way changed, such suffixes are listed here for historical note only.

In effect, this new numbering scheme changed the focus of the SCB from design and development to procurement and budget compliance. As a result, concept-only designs would largely disappear from the historical record.

More information 1965-1975 SCB block # ...
More information SCB #, Start date ...

CIP

The SCB also had a list of projects called Class Improvement Projects. These were usually changes of a lesser scope or risk than SCB projects; many were contingency plans to refurbish reserve ships had it been necessary to reactivate them.[300] No list of CIP numbers is available.

See also


References

Notes

  1. Friedman, Submarines, p. 7
  2. Friedman, Battleships, pp 311-313
  3. Friedman, Destroyers, pp 2-3
  4. Friedman, Destroyers, p. 3
  5. Friedman, Amphibious Ships, p. 13
  6. Friedman, Destroyers, p. 5
  7. Friedman, Amphibious Ships, p. 13
  8. Friedman, Submarines pp. 132-133
  9. Friedman, Submarines, p. 28
  10. Friedman, Destroyers, p. 369
  11. Friedman, Submarines, p. 28
  12. Friedman, Submarines, p. 28
  13. Friedman, Submarines, p. 31
  14. Friedman, Destroyers, p. 298
  15. Friedman, Aircraft Carriers, p. 237
  16. Friedman, Aircraft Carriers, p. 230
  17. Friedman, Destroyers, p. 265
  18. Friedman, Destroyers, p. 269
  19. Friedman, Aircraft Carriers, p. 340
  20. Friedman, Amphibious Ships, p. 303
  21. Friedman, Amphibious Ships, p. 303
  22. Crierie, SCB Numbers
  23. Friedman, Submarines, p. 90
  24. Friedman, Submarines, p. 90
  25. Crierie, SCB Numbers
  26. Friedman, Amphibious Ships, p. 311
  27. Friedman, Amphibious Ships, p. 311
  28. Friedman, Amphibious Ships, p. 311
  29. Friedman, Amphibious Ships, p. 311
  30. Friedman, Battleships, p. 390
  31. Wildenberg, 1996, p. 207
  32. Wildenberg, 1996, p. 207
  33. Friedman, Submarines, p. 267
  34. Friedman, Amphibious Ships, p. 383
  35. Friedman, Amphibious Ships, p. 390
  36. Crierie, SCB Numbers
  37. Friedman, Aircraft Carriers, p. 288
  38. Friedman, Aircraft Carriers, p. 288
  39. Friedman, Aircraft Carriers, p. 288
  40. Friedman, Aircraft Carriers, pp. 24-25
  41. Friedman, Submarines, p. 178
  42. Friedman, Amphibious Ships, p. 311
  43. Crierie, SCB Numbers
  44. Roberts, U.S. Navy Ship Design Project Numbers
  45. Crierie, SCB Numbers
  46. Friedman, Amphibious Ships, p. 254
  47. Friedman, Amphibious Ships, pp. 254, 256
  48. Friedman, Battleships, pp. 402-403
  49. Friedman, Submarines, p. 89
  50. Friedman, Submarines, pp. 252-263
  51. Friedman, Aircraft Carriers, pp. 340-342
  52. Crierie, SCB Numbers
  53. Friedman, Destroyers, pp. 229-231
  54. Friedman, Destroyers, p. 231
  55. Friedman, Destroyers, pp. 231-232
  56. Friedman, Submarines, p. 41
  57. see linked Wiki article
  58. see linked Wiki article
  59. see linked Wiki article
  60. Friedman, Cruisers, p. 377
  61. Crierie, SCB Numbers
  62. Roberts, AO-105
  63. Friedman, Destroyers, pp. 271-273
  64. Friedman, Destroyers, p. 246
  65. Friedman, Destroyers, p. 246
  66. Crierie, SCB Numbers
  67. Friedman, Submarines, p. 80
  68. Friedman, Amphibious Ships, p. 300
  69. Friedman, Amphibious Ships, p. 300
  70. Friedman, Destroyers, p. 161
  71. Friedman, Destroyers, p. 161
  72. Friedman, Submarines, p. 182
  73. Hewlett & Duncan, Nuclear Navy, p. 162
  74. Friedman, Submarines, p. 186
  75. Hewlett & Duncan, Nuclear Navy, p. 162
  76. Friedman, Submarines, p. 220
  77. Friedman, Submarines, p. 99
  78. Friedman, Submarines, p. 47
  79. Friedman, Submarines, p. 48
  80. Friedman, Submarines, p. 222
  81. Crierie, SCB Numbers
  82. Friedman, Destroyers, pp. 273-274
  83. Friedman, Naval Anti-Air Guns, p. 1043
  84. Friedman, Destroyers, p. 118
  85. Friedman, Battleships, p. 390
  86. Friedman, Amphibious Ships, pp. 329-330
  87. Friedman, Destroyers, p. 269
  88. Friedman, Amphibious Ships, p. 318
  89. Friedman, Amphibious Ships, pp. 319-322
  90. Crierie, SCB Numbers
  91. Friedman, Destroyers, p. 269
  92. Friedman, Aircraft Carriers, p. 256
  93. Crierie, SCB Numbers
  94. Friedman, Cruisers, p. 430
  95. Friedman, Submarines, p. 94
  96. Friedman, Destroyers, pp. 246-249
  97. Friedman, Destroyers, p. 249
  98. Crierie, SCB Numbers
  99. Friedman, Small Combatants, p. 201
  100. Friedman, Small Combatants, pp. 207-208
  101. Friedman, Amphibious Ships, p. 292
  102. Friedman, Amphibious Ships, p. 292
  103. Crierie, SCB Numbers
  104. Friedman, Aircraft Carriers, p. 300
  105. Friedman, Aircraft Carriers, p. 300
  106. Crierie, SCB Numbers
  107. Crierie, SCB Numbers
  108. Friedman, Submarines, p. 31
  109. Friedman, Submarines, p. 178
  110. Friedman, Amphibious Ships, pp. 306-307
  111. Friedman, Submarines, p. 128
  112. Friedman, Amphibious Ships, p. 350
  113. Roberts, LSV-1-2
  114. Roberts, U.S. Navy Ship Design Project Numbers
  115. Friedman, Aircraft Carriers, p. 296
  116. Friedman, Aircraft Carriers, p. 296
  117. Crierie, SCB Numbers
  118. Friedman, Aircraft Carriers, p. 274
  119. Friedman, Aircraft Carriers, p. 279
  120. Friedman, Aircraft Carriers, p. 280
  121. Friedman, Aircraft Carriers, p. 280
  122. Friedman, Destroyers, pp. 295-297
  123. Friedman, Destroyers, p. 266
  124. Friedman, Destroyers, pp. 275-279
  125. Friedman, Submarines, p. 95
  126. Roberts, AV-4
  127. Friedman, Small Combatants, p. 209
  128. Friedman, Submarines, p. 179
  129. Friedman, Submarines, p. 182
  130. Crierie, SCB Numbers
  131. Friedman, Cruisers, pp. 386-387
  132. Friedman, Cruisers, p. 393
  133. Friedman, Amphibious Ships, p. 292
  134. Friedman, Destroyers, p. 297
  135. Friedman, Small Combatants, pp. 207-208
  136. Crierie, SCB Numbers
  137. Friedman, Cruisers, pp. 386-388
  138. Friedman, Cruisers, p. 393
  139. Crierie, SCB Numbers
  140. Crierie, SCB Numbers
  141. Friedman, Amphibious Ships, pp. 384, 386
  142. Friedman, Amphibious Ships, p. 390
  143. Friedman, Submarines, p. 33
  144. Roberts, AV-7
  145. Friedman, Amphibious Ships, p. 337
  146. Friedman, Aircraft Carriers, p. 277
  147. Friedman, Submarines, p. 258
  148. Friedman, Destroyers, pp. 299, 307-309
  149. Friedman, Amphibious Ships, p. 353
  150. Friedman, Cruisers, p. 405
  151. Friedman, Amphibious Ships, p. 356
  152. Friedman, Aircraft Carriers, pp. 278, 312
  153. Roberts, U.S. Navy Ship Design Project Numbers
  154. Friedman, Amphibious Ships, p. 393
  155. Friedman, Cruisers, p. 405
  156. Friedman, Cruisers, p. 406
  157. Roberts, U.S. Navy Ship Design Project Numbers
  158. Roberts, U.S. Navy Ship Design Project Numbers
  159. Friedman, Cruisers, p. 406
  160. Friedman, Cruisers, p. 406
  161. Friedman, Cruisers, p. 402
  162. Roberts, U.S. Navy Ship Design Project Numbers
  163. Friedman, Destroyers, pp. 299-303
  164. Friedman, Destroyers, pp. 304-306
  165. Friedman, Cruisers, pp. 394-398
  166. Friedman, Cruisers, p. 400
  167. Friedman, Cruisers, p. 400
  168. Friedman, Aircraft Carriers, p. 346
  169. Crierie, SCB Numbers
  170. Crierie, SCB Numbers
  171. Crierie, SCB Numbers
  172. Friedman, Submarines, p. 199
  173. Friedman, Submarines, p. 199
  174. Roberts, U.S. Navy Ship Design Project Numbers
  175. Roberts, U.S. Navy Ship Design Project Numbers
  176. Friedman, Small Combatants, p. 209
  177. Friedman, Small Combatants, p. 209
  178. Crierie, SCB Numbers
  179. Friedman, Amphibious Ships, p. 364
  180. Friedman, Amphibious Ships, p. 365
  181. Friedman, Amphibious Ships, p. 365
  182. Friedman, Submarines, p. 143
  183. Friedman, Submarines, p. 146
  184. Friedman, Submarines, p. 143
  185. Crierie, SCB Numbers
  186. Crierie, SCB Numbers
  187. Roberts, CM-5
  188. Crierie, SCB Numbers
  189. Crierie, SCB Numbers
  190. Crierie, SCB Numbers
  191. Crierie, SCB Numbers
  192. Friedman, Destroyers, pp. 349-351
  193. Friedman, Destroyers, p. 355
  194. Friedman, Destroyers, p. 357
  195. Friedman, Destroyers, pp. 359-361
  196. Friedman, Small Combatants, p. 212
  197. Friedman, Aircraft Carriers, p. 317
  198. Crierie, SCB Numbers
  199. Friedman, Destroyers, p. 285
  200. Friedman, Submarines, p. 122
  201. Crierie, SCB Numbers
  202. Friedman, Aircraft Carriers, p. 280
  203. Friedman, Aircraft Carriers, p. 282
  204. Friedman, Destroyers, p. 306
  205. Crierie, SCB Numbers
  206. Crierie, SCB Numbers
  207. Friedman, Submarines, p. 199
  208. Friedman, Submarines, p. 199
  209. see linked Wiki article
  210. Roberts, AV-4
  211. Friedman, Small Combatants, p. 217
  212. Crierie, SCB Numbers
  213. Friedman, Amphibious Ships, p. 398
  214. Friedman, Destroyers, p. 316
  215. Crierie, SCB Numbers
  216. Fahey, p. 63
  217. Crierie, SCB Numbers
  218. Crierie, SCB Numbers
  219. Friedman, Destroyers, p. 338
  220. Crierie, SCB Numbers
  221. Crierie, SCB Numbers
  222. Crierie, SCB Numbers
  223. Crierie, SCB Numbers
  224. Crierie, SCB Numbers
  225. Crierie, SCB Numbers
  226. Crierie, SCB Numbers
  227. Crierie, SCB Numbers
  228. Friedman, Destroyers, pp. 364-370
  229. Fahey, p. 13
  230. Fahey, p. 12
  231. Crierie, SCB Numbers
  232. Fahey, pp. 49, 63
  233. Friedman, Submarines, p. 149
  234. Friedman, Amphibious Ships, pp. 339-344
  235. Friedman, Amphibious Ships, pp. 426-430
  236. Friedman, Aircraft Carriers, p. 318
  237. Fahey, p. 13
  238. Friedman, Small Combatants, p. 257
  239. Friedman, Amphibious Ships, p. 429
  240. Friedman, Cruisers, p. 398
  241. Friedman, Cruisers, p. 380
  242. Crierie, SCB Numbers
  243. Crierie, SCB Numbers
  244. Friedman, Aircraft Carriers, p. 219
  245. Friedman, Aircraft Carriers, p. 306
  246. Crierie, SCB Numbers
  247. Friedman, Aircraft Carriers, p. 301
  248. Fahey, p. 24
  249. Crierie, SCB Numbers
  250. Crierie, SCB Numbers
  251. Crierie, SCB Numbers
  252. Crierie, SCB Numbers
  253. Fahey, p. 12
  254. Fahey, p. 12
  255. Crierie, SCB Numbers
  256. Crierie, SCB Numbers
  257. Roberts, U.S. Navy Ship Design Project Numbers
  258. Roberts, U.S. Navy Ship Design Project Numbers
  259. Roberts, U.S. Navy Ship Design Project Numbers
  260. Roberts, U.S. Navy Ship Design Project Numbers
  261. Roberts, U.S. Navy Ship Design Project Numbers
  262. Roberts, U.S. Navy Ship Design Project Numbers
  263. Roberts, U.S. Navy Ship Design Project Numbers
  264. Roberts, U.S. Navy Ship Design Project Numbers
  265. Roberts, U.S. Navy Ship Design Project Numbers
  266. Fahey, p. 63
  267. Fahey, p. 44
  268. Friedman, Amphibious Ships, pp. 331-334
  269. Friedman, Amphibious Ships, pp. 331-334
  270. Fahey, pp. 42, 45 & 63
  271. Fahey, p. 45
  272. Fahey, p. 45
  273. Friedman, Amphibious Ships, pp. 374-381
  274. Crierie, SCB Numbers
  275. Crierie, SCB Numbers
  276. Crierie, SCB Numbers
  277. Crierie, SCB Numbers
  278. Fahey, p. 49
  279. Crierie, SCB Numbers
  280. Fahey, p. 63
  281. Fahey, p. 49
  282. Crierie, SCB Numbers
  283. Fahey p. 63
  284. Crierie, SCB Numbers
  285. Crierie, SCB Numbers
  286. Fahey, p. 63
  287. Crierie, SCB Numbers
  288. Crierie, SCB Numbers
  289. Crierie, SCB Numbers
  290. Crierie, SCB Numbers
  291. Crierie, SCB Numbers
  292. Crierie, SCB Numbers
  293. Crierie, SCB Numbers
  294. Crierie, SCB Numbers
  295. Crierie, SCB Numbers
  296. Crierie, SCB Numbers
  297. Crierie, SCB Numbers
  298. Fahey, p. 45
  299. Friedman, Battleships, p. 400
  300. Friedman, Destroyers, p. 161

Sources

  • Crierie, Ryan. "US Navy Ship Characteristic Board (SCB) Numbers" Accessed 22 September 2008.
  • Fahey, James C. (1965). The Ships and Aircraft of the United States Fleet, Eighth Edition. Annapolis, Maryland: United States Naval Institute. ISBN 0-87021-637-6.
  • Friedman, Norman (1982). U.S. Destroyers: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. ISBN 0-87021-733-X.
  • Friedman, Norman (1983). U.S. Aircraft Carriers: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute]. ISBN 0-87021-739-9.
  • Friedman, Norman (1984). U.S. Cruisers: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. ISBN 0-87021-739-9.
  • Friedman, Norman (1985). U.S. Battleships: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. ISBN 0-87021-715-1.
  • Friedman, Norman (1987). U.S. Small Combatants: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. ISBN 978-0870217135.
  • Friedman, Norman (1994). U.S. Submarines Since 1945: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. ISBN 1-55750-260-9.
  • Friedman, Norman (2002). U.S. Amphibious Ships and Craft: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. ISBN 1-55750-250-1.
  • Friedman, Norman (2014). Naval Anti-Aircraft Guns & Gunnery. Annapolis, Maryland: United States Naval Institute. ISBN 978-1591146049.
  • Hewlett, Richard; Duncan, Francis (1974). Nuclear Navy 1946-1962. Chicago, Illinois: University of Chicago Press. ISBN 0-226-32219-5.{{cite book}}: CS1 maint: ignored ISBN errors (link)
  • Roberts, Stephen S. "Class: CURTISS (AV-4)" Accessed 12 July 2008.
  • Roberts, Stephen S. "Class: CURRITUCK (AV-7)" Accessed 12 July 2008.
  • Roberts, Stephen S. "Class: CATSKILL (LSV 1-2)" Accessed 25 July 2008.
  • Roberts, Stephen S. "Class: TERROR (CM-5)" Accessed 29 December 2008.
  • Roberts, Stephen S. "Class: MISPILLION (AO-105)" Accessed 4 August 2010.
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  • Wildenberg, Thomas (1996). Gray Steel and Black Oil. Annapolis, Maryland: United States Naval Institute. ISBN 1-55750-934-4.

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