215:
121:
to a distribution box, a brass connection box weighing 300 lbs and providing protection for connections between the "shore cable" (running to the on-shore mine casemate) and the cables to the 19 mines that made up a mine Group. The buoys marking the mine and the distribution box were used during planting, and could also remain attached to the mines and equipment during service, at the discretion of the local commander. A typical distribution box had almost three miles of single-conductor cable running from it to the 19 individual mines of its Group.
289:
82:
309:"}},"text\/plain":{"en":{"":"determination method"}}},"{\"value\":{\"entity-type\":\"item\",\"numeric-id\":60671452,\"id\":\"Q60671452\"},\"type\":\"wikibase-entityid\"}":{"text\/html":{"en":{"P459":"
305:"}},"text\/plain":{"en":{"P1001":"United States of America"}}},"{\"value\":{\"entity-type\":\"property\",\"numeric-id\":459,\"id\":\"P459\"},\"type\":\"wikibase-entityid\"}":{"text\/html":{"en":{"":"
301:"}},"text\/plain":{"en":{"":"applies to jurisdiction"}}},"{\"value\":{\"entity-type\":\"item\",\"numeric-id\":30,\"id\":\"Q30\"},\"type\":\"wikibase-entityid\"}":{"text\/html":{"en":{"P1001":"
293:"}},"text\/plain":{"en":{"":"copyright status"}}},"{\"value\":{\"entity-type\":\"item\",\"numeric-id\":19652,\"id\":\"Q19652\"},\"type\":\"wikibase-entityid\"}":{"text\/html":{"en":{"P6216":"
297:"}},"text\/plain":{"en":{"P6216":"public domain"}}},"{\"value\":{\"entity-type\":\"property\",\"numeric-id\":1001,\"id\":\"P1001\"},\"type\":\"wikibase-entityid\"}":{"text\/html":{"en":{"":"
38:
120:
This image is taken from
Training Manual TM 2160-20, "Submarine Mining," U.S. War Department, Washington, D.C., October 15, 1930, p. 217. It shows a spherical mine (cylindrical ones were also used) tethered to an anchor which kept it at a pre-determined height above the bottom. The mine is connected
427:
444:
This image is taken from
Training Manual TM 2160-20, "Submarine Mining," U.S. War Department, Washington, D.C., October 15, 1930, p. 217. It shows a spherical mine (cylindrical ones were also used) tethered to an anchor which kept it at a pre-determined
172:
310:
294:
298:
290:
306:
302:
167:
464:
313:"}},"text\/plain":{"en":{"P459":"work of the federal government of the United States"}}}}": -->
193:, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the
197:
225:
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
371:
480:
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
336:
349:
320:
364:
279:
356:
168:
work prepared by an officer or employee of the United States
Government as part of that person’s official duties
48:
42:
194:
93:
483:
If the file has been modified from its original state, some details may not fully reflect the modified file.
61:
201:
516:
185:: This only applies to original works of the Federal Government and not to the work of any individual
455:
The following pages on the
English Knowledge use this file (pages on other projects are not listed):
204:
of
Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see
190:
101:
224:
8:
176:
162:
88:
269:
469:
459:
426:
421:
52:
37:
205:
330:
186:
531:
437:
394:
Click on a date/time to view the file as it appeared at that time.
76:
263:
Add a one-line explanation of what this file represents
453:
392:
100:
Commons is a freely licensed media file repository.
372:
work of the federal government of the United States
311:
work of the federal government of the United States
233:https://creativecommons.org/publicdomain/mark/1.0/
66:(485 × 800 pixels, file size: 106 KB, MIME type:
465:Submarine mines in United States harbor defense
81:
14:
239:Creative Commons Public Domain Mark 1.0
166:in the United States because it is a
153:
112:
148:
385:
13:
478:
268:
262:
213:
159:
113:
59:
580:
485:
267:
454:
253:
173:Title 17, Chapter 1, Section 105
152:
80:
21:
565:Date metadata was last modified
250:
389:
249:
26:
1:
31:
450:
275:Items portrayed in this file
195:United States Postal Service
124:
7:
557:Date and time of digitizing
475:
10:
585:
517:Adobe Photoshop CS Windows
115:
523:File change date and time
386:
223:
16:
357:United States of America
303:United States of America
252:
206:The US Mint Terms of Use
87:This is a file from the
36:
443:
350:applies to jurisdiction
299:applies to jurisdiction
91:. Information from its
218:
94:description page there
41:Size of this preview:
497:Horizontal resolution
217:
365:determination method
307:determination method
160:This work is in the
568:04:25, 27 July 2010
560:04:25, 27 July 2010
526:09:25, 27 July 2010
505:Vertical resolution
422:13:50, 27 July 2010
170:under the terms of
47:Other resolutions:
219:
572:
571:
448:
261:
230:
229:
209:
147:
146:
109:
108:
89:Wikimedia Commons
576:
486:
470:User:Pgrig/Mines
460:Controlled mines
434:
396:
374:
369:
359:
354:
321:copyright status
291:copyright status
259:
246:
243:
240:
237:
234:
216:
181:
156:
155:
149:
143:
140:
137:
134:
129:
128:
105:
84:
83:
77:
71:
69:
56:
53:485 × 800 pixels
49:145 × 240 pixels
43:363 × 599 pixels
584:
583:
579:
578:
577:
575:
574:
573:
474:
456:
449:
440:
432:
388:
387:
384:
383:
382:
381:
380:
379:
378:
377:
376:
375:
370:
367:
361:
360:
355:
352:
343:
342:
341:
339:
327:
326:
325:
323:
288:
287:
286:
285:
284:
282:
266:
265:
264:
244:
241:
238:
235:
232:
214:
210:
141:
138:
135:
132:
127:
118:
111:
110:
99:
98:
97:is shown below.
73:
67:
65:
58:
57:
46:
12:
11:
5:
582:
570:
569:
566:
562:
561:
558:
554:
553:
550:
546:
545:
542:
538:
537:
534:
528:
527:
524:
520:
519:
514:
510:
509:
506:
502:
501:
498:
494:
493:
490:
477:
473:
472:
467:
462:
452:
447:
446:
442:
438:
435:
429:
424:
419:
415:
414:
411:
408:
405:
402:
399:
391:
363:
362:
348:
347:
346:
345:
344:
340:
335:
333:
332:
331:
329:
328:
324:
319:
317:
316:
315:
314:
312:
308:
304:
300:
296:
292:
283:
278:
276:
273:
272:
271:
270:
258:
257:
254:
251:
228:
227:
221:
220:
211:
157:
145:
144:
126:
123:
117:
114:
107:
106:
85:
75:
74:
40:
35:
34:
29:
24:
19:
9:
6:
4:
3:
2:
581:
567:
564:
563:
559:
556:
555:
551:
548:
547:
543:
540:
539:
535:
533:
530:
529:
525:
522:
521:
518:
515:
513:Software used
512:
511:
507:
504:
503:
499:
496:
495:
491:
488:
487:
484:
481:
471:
468:
466:
463:
461:
458:
457:
441:
436:
430:
428:
425:
423:
420:
417:
416:
412:
409:
406:
403:
400:
398:
397:
395:
373:
366:
358:
351:
338:
337:public domain
334:
322:
318:
295:public domain
281:
277:
274:
255:
248:
247:
226:
222:
212:
207:
203:
199:
196:
192:
188:
184:
179:
178:
174:
169:
165:
164:
163:public domain
158:
151:
150:
136:Public domain
133:Public domain
131:
130:
122:
103:
96:
95:
90:
86:
79:
78:
72:
63:
62:Original file
54:
50:
44:
39:
33:
30:
28:
25:
23:
20:
18:
15:
549:Image height
536:Uncalibrated
482:
479:
393:
390:File history
231:
182:
171:
161:
119:
102:You can help
92:
60:
22:File history
541:Image width
532:Color space
489:Orientation
202:313.6(C)(1)
451:File usage
431:485 × 800
407:Dimensions
198:since 1978
187:U.S. state
68:image/jpeg
27:File usage
404:Thumbnail
401:Date/Time
200:. (See §
191:territory
125:Licensing
476:Metadata
433:(106 KB)
256:Captions
32:Metadata
418:current
413:Comment
280:depicts
260:English
177:US Code
175:of the
116:Summary
64:
552:800 px
544:485 px
508:96 dpi
500:96 dpi
492:Normal
439:Pgrig
245:false
242:false
142:false
139:false
410:User
183:Note
17:File
236:PDM
368::
353::
189:,
180:.
51:|
45:.
445:h
208:.
104:.
70:)
55:.