File:Mine-and-Box.jpg
Original file (485 × 800 pixels, file size: 106 KB, MIME type: image/jpeg)
Captions
Summary
editThis 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 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.
Licensing
editPublic domainPublic domainfalsefalse |
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
|
||
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 13:50, 27 July 2010 | 485 × 800 (106 KB) | Pgrig (talk | contribs) | 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 h |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Orientation | Normal |
---|---|
Horizontal resolution | 96 dpi |
Vertical resolution | 96 dpi |
Software used | Adobe Photoshop CS Windows |
File change date and time | 09:25, 27 July 2010 |
Color space | Uncalibrated |
Image width | 485 px |
Image height | 800 px |
Date and time of digitizing | 04:25, 27 July 2010 |
Date metadata was last modified | 04:25, 27 July 2010 |