# False bottom

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{{Short description|Secret partition in a container}}
thumb|Drawing of a drawer with a false back
A '''false bottom''' (or '''false back''') is an internal partition in a [container](/source/Packaging), typically at the bottom of a [drawer](/source/Drawer_(furniture)), suitcase or similar item, enabling the concealment of objects from a cursory [examination](/source/Observational_study) of the item's contents. A false bottom may be present if the internal [dimensions](/source/dimensions) of a container do not match its external dimensions after taking into account the thicknesses of constituent materials and [structures](/source/structures) used to build the object.

The term false bottom can also refer to the [deep scattering layer](/source/deep_scattering_layer) in the ocean, a phenomenon where a layer of marine organisms deep in the ocean can be mistaken by [sonar](/source/sonar) for the [seabed](/source/seabed).<ref>Hersey JB and Backus RH (2005) [https://books.google.com/books?id=7zX1Vdt8ekkC&dq=%22ECR+layer%22&pg=PA499 "Sound Scattering by Marine Organisms"] In: M. N. Hill and A. R. Robinson (Eds)''Physical Oceanography'', Page 499, Harvard University Press. {{ISBN|9780674017276}}.</ref> In [Polar](/source/Polar_regions_of_Earth) research, the [false bottom](/source/false_bottom_(sea_ice)) refers to the type of thin [sea ice](/source/sea_ice) which is formed underwater at the interface of low-salinity [meltwater](/source/meltwater) and saline [seawater](/source/seawater), typically during summer season.<ref>{{Cite journal|last1=Notz|first1=Dirk|last2=McPhee|first2=Miles G.|last3=Worster|first3=M. Grae|last4=Maykut|first4=Gary A.|last5=Schlünzen|first5=K.Heinke|last6=Eicken|first6=Hajo|date=2018|title=Impact of underwater-ice evolution on Arctic summer sea ice
|journal=Journal of Geophysical Research: Oceans|language=en|volume=108|issue=C7|doi=10.1029/2001JC001173|doi-access=free}}</ref>

==See also==
*[Concealment device](/source/Concealment_device)
*[Drawer (furniture)](/source/Drawer_(furniture))

==References==
{{reflist}}

{{DEFAULTSORT:False Bottom}}
Category:Cabinets (furniture)
Category:Secrecy

{{Furniture-stub}}

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Adapted from the Wikipedia article [False bottom](https://en.wikipedia.org/wiki/False_bottom) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/False_bottom?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.