234:
189:
173:
219:
204:
266:
38:
115:. This allowed safe raising or lowering of the chain, as they were often heavily fortified. By raising or lowering a chain or boom, access could be selectively granted rather than simply rendering the stretch of water completely inaccessible. The raising and lowering could be accomplished by a
83:
In modern times they usually have civil uses, such as to prevent access to a dangerous river channel. But, especially historically, they have been used militarily, with the goal of denying access to an enemy's ships: a modern example is the
233:
99:
A boom generally floats on the surface, while a chain can be on the surface or below the water. A chain could be made to float with rafts, logs, ships or other wood, making the chain a boom as well.
537:
500:
172:
188:
203:
218:
510:
138:. Frequently, however, attackers instead seized the defences and cut the chain or boom by more conventional methods. The boom at the
610:
552:
437:
179:
127:
646:
126:
Booms or chains could be broken by a sufficiently large or heavy ship, and this occurred on many occasions, including the
336:
149:
As a key portion of defences, booms were usually heavily defended. This involved shore-based chain towers,
161:, discouraging assaults on the boom. On some occasions, multiple booms spanned a single stretch of water.
375:
505:
31:
80:
or variants) is an obstacle strung across a navigable stretch of water to control or block navigation.
600:
360:
37:
581:
The Naval
History of Great Britain: From the Earliest Times to the Rising of the Parliament in 1779
404:
380:
585:
441:
418:
399:
354:
342:
326:
321:
294:
225:
135:
131:
120:
85:
606:
346:
274:
240:
158:
150:
290:
365:
579:
244:
139:
46:
556:
640:
532:
386:
270:
332:
317:
301:
436:
Some sources have the chain being dismantled instead of broken by a ship in the
311:
210:
154:
42:
626:
466:
157:, a boom protecting a harbour could have several ships defending it with their
265:
487:
17:
412:
371:
350:
248:
143:
116:
107:
Especially in medieval times, the end of a chain could be attached to a
195:
283:
305:
264:
91:
Booms have also been used to force passing vessels to pay a toll.
36:
538:
The
History of the Decline and Fall of the Roman Empire, Volume 6
178:
Crusaders break a chain protecting the harbour (at left) in the
627:"The Mississippi River in the Civil War Historical Marker"
501:"Filling in the missing links on history of harbour chain"
467:"Site types in the Gatehouse listings — Chain Tower"
407:- a vessel charged with laying anti-submarine nets
605:. Great Britain: Lancer Publishers. p. 24.
602:Medals of the British Navy and How They Were Won
209:Remains of the great chain that protected the
8:
555:. M.A. de Ruyter Foundation. Archived from
460:
458:
353:in order to block Union ships during the
273:, which proved to be useful against the
454:
168:
142:, for example, was cut by sailors in a
286:at Carthage was protected by a chain.
7:
389:, to defend the city and naval base.
421:- a boom for containing oil spills
247:from Soviet submarines during the
25:
553:"THE DUTCH IN THE MEDWAY - 1667"
232:
217:
202:
187:
171:
304:included a chain blocking the
1:
499:Bob Hind (January 27, 2013).
316:A chain and boom blocked the
465:Philip Davis (May 7, 2012).
415:- a boom for collecting logs
337:Battle of Vuelta de Obligado
153:batteries, or forts. In the
224:A preserved section of the
663:
29:
578:Hervey, Frederic (1779).
341:A chain was placed from
243:, built to protect the
331:The chain blocking the
278:
49:
584:. W Adlard. pp.
269:Defensive system for
268:
40:
647:Nautical terminology
488:Boom Towers, Norwich
310:A chain spanned the
282:The entrance to the
41:A boom blocking the
30:For other uses, see
27:Navigational barrier
559:on October 21, 2013
513:on October 21, 2013
405:Boom defence vessel
376:Saint Philip Castle
442:raid on the Medway
419:Boom (containment)
400:Anti-submarine net
355:American Civil War
343:Columbus, Kentucky
327:Hudson River Chain
322:Raid on the Medway
297:from 1431 to 1539.
295:Portsmouth Harbour
279:
226:Hudson River Chain
136:Battle of Vigo Bay
132:raid on the Medway
86:anti-submarine net
50:
599:Long, WH (2010).
438:siege of Damietta
347:Mississippi River
275:Ferrol Expedition
241:Shoeburyness Boom
180:siege of Damietta
128:siege of Damietta
16:(Redirected from
654:
631:
630:
623:
617:
616:
596:
590:
589:
575:
569:
568:
566:
564:
549:
543:
542:
529:
523:
522:
520:
518:
509:. Archived from
496:
490:
485:
479:
478:
476:
474:
462:
435:
384:
369:
236:
221:
206:
191:
175:
21:
662:
661:
657:
656:
655:
653:
652:
651:
637:
636:
635:
634:
625:
624:
620:
613:
598:
597:
593:
577:
576:
572:
562:
560:
551:
550:
546:
531:
530:
526:
516:
514:
498:
497:
493:
486:
482:
472:
470:
464:
463:
456:
451:
432:
428:
396:
378:
363:
291:Fort Blockhouse
263:
258:
251:
239:Remains of the
237:
228:
222:
213:
207:
198:
194:Boom towers in
192:
183:
176:
167:
119:mechanism or a
105:
103:Historical uses
97:
35:
28:
23:
22:
15:
12:
11:
5:
660:
658:
650:
649:
639:
638:
633:
632:
618:
611:
591:
570:
544:
541:. p. 510.
533:Gibbon, Edward
524:
491:
480:
453:
452:
450:
447:
446:
445:
427:
424:
423:
422:
416:
410:
409:
408:
395:
392:
391:
390:
361:A Palma Castle
357:
339:
329:
324:
314:
308:
298:
287:
262:
259:
257:
254:
253:
252:
245:Thames Estuary
238:
231:
229:
223:
216:
214:
208:
201:
199:
193:
186:
184:
177:
170:
166:
163:
140:siege of Derry
104:
101:
96:
93:
47:siege of Derry
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
659:
648:
645:
644:
642:
628:
622:
619:
614:
612:9781935501275
608:
604:
603:
595:
592:
587:
583:
582:
574:
571:
558:
554:
548:
545:
540:
539:
534:
528:
525:
512:
508:
507:
502:
495:
492:
489:
484:
481:
468:
461:
459:
455:
448:
443:
439:
434:
430:
429:
425:
420:
417:
414:
411:
406:
403:
402:
401:
398:
397:
393:
388:
387:ria of Ferrol
382:
377:
373:
367:
362:
358:
356:
352:
348:
344:
340:
338:
334:
330:
328:
325:
323:
319:
315:
313:
309:
307:
303:
299:
296:
293:, protecting
292:
289:The chain at
288:
285:
281:
280:
276:
272:
271:Ferrol, Spain
267:
260:
255:
250:
246:
242:
235:
230:
227:
220:
215:
212:
205:
200:
197:
190:
185:
181:
174:
169:
164:
162:
160:
156:
152:
147:
145:
141:
137:
133:
129:
124:
122:
118:
114:
110:
102:
100:
94:
92:
89:
87:
81:
79:
75:
71:
67:
66:harbour chain
63:
59:
55:
48:
44:
39:
33:
19:
621:
601:
594:
580:
573:
561:. Retrieved
557:the original
547:
536:
527:
515:. Retrieved
511:the original
504:
494:
483:
471:. Retrieved
433:
359:Between the
333:Parana River
318:River Medway
302:Leonine Wall
148:
125:
112:
108:
106:
98:
90:
82:
77:
73:
69:
65:
62:boom defence
61:
57:
53:
51:
563:October 21,
517:October 17,
473:October 17,
469:. Gatehouse
440:and in the
379: [
364: [
345:across the
335:during the
320:during the
312:Golden Horn
211:Golden Horn
155:Age of Sail
109:chain tower
95:Description
70:river chain
45:during the
43:River Foyle
18:River chain
449:References
261:Historical
159:broadsides
113:boom tower
78:boom chain
74:chain boom
151:artillery
641:Category
506:The News
413:Log boom
394:See also
372:Mugardos
351:Missouri
256:Examples
249:Cold War
144:longboat
134:and the
117:windlass
196:Norwich
165:Gallery
121:capstan
609:
284:Cothon
130:, the
60:(also
426:Notes
385:, in
383:]
368:]
306:Tiber
58:chain
56:or a
607:ISBN
565:2013
519:2013
475:2013
374:and
300:The
54:boom
32:Boom
370:in
349:to
111:or
643::
586:77
535:.
503:.
457:^
431:A.
381:gl
366:gl
146:.
123:.
88:.
76:,
72:,
68:,
64:,
52:A
629:.
615:.
588:.
567:.
521:.
477:.
444:.
277:.
182:.
34:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
