|Length:||100.55 m (329 ft 11 in)|
|Beam:||15.40 m (50 ft 6 in)|
|Draft:||4.05 m (13 ft 3 in)|
|Speed:||15 knots (28 km/h)|
|Range:||2,600 nmi (4,800 km)|
|Complement:||40 (standard) + >38 (repair party, passengers, squadron staff)|
|Aviation facilities:||No hangar, but a heli deck was added for Sea King sized or larger helicopters|
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The Type 404 Elbe class replenishment ships of the German Navy were built to support its squadrons of Fast Attack Craft, submarines and minesweeper/hunters, as such they are usually referred to as tenders.
The ships carry fuel, fresh water, food, ammunition and other matériel. They also have a medical station aboard but doctors are not part of their standard complement and will have to be flown in. The tender also manage waste disposal for the ships they support at sea and can carry out minor repairs of assigned ships. For this purpose Elbe class tenders assigned to FAC squadrons, for example, carry the SUG repair and support shop specialized for these boats on their deck in a set of 13 standard containers.
Extensive communication gear and accommodations enable them to serve as squadron flagship.
While in general all Elbe class tenders are quickly configurable to be reassigned to support other squadrons, one of the six ships is usually modified to support German submarines - carrying batteries for reloading for example. This ship - currently A515 Main - while still being of the same class, and easily reconfigurable - is often named as a separate 'sub-class' due to this larger modification.
List of ships
|A511||Elbe||DRHJ||January 28, 1993||Warnemünde||7th FAC squadron|
|A512||Mosel||DRHK||July 1, 1993||Kiel||5th Minesweeper squadron|
|A513||Rhein||DRHL||September 1, 1993||Kiel||3rd Minesweeper squadron|
|A514||Werra||DRHM||December 9, 1993||Kiel||3rd Minesweeper squadron|
|A515||Main||DRHN||June 10, 1994||Eckernförde||1st Submarine squadron|
|A516||Donau||DRHO||November 15, 1994||Warnemünde||1st Corvette squadron|
The ships were named after German rivers.
Tender A511 Elbe in Warnemünde.
Tender A511 Elbe.
Tender A513 Rhein in Eckernförde Eve online mac client update.
Tender A514 Werra in London
A515 in Catania
MLG-27 onboard Elbe class tender Rhein.
A516 in the Belgian Navy Base of Zeebrugge.
-  - German Navy, official homepage (in German)
- https://web.archive.org/web/20050130085054/http://www.tender-elbe.de/seiten/typenbla.htm(in German)
|Wikimedia Commons has media related to Elbe class replenishment ships.|
A view function, or view for short, is a Python function that takes aWeb request and returns a Web response. This response can be the HTML contentsof a Web page, or a redirect, or a 404 error, or an XML document, or an image . . or anything, really. The view itself contains whatever arbitrary logic isnecessary to return that response. This code can live anywhere you want, as longas it’s on your Python path. There’s no other requirement–no “magic,” so tospeak. For the sake of putting the code somewhere, the convention is toput views in a file called
views.py, placed in your project orapplication directory.
A simple view¶
Here’s a view that returns the current date and time, as an HTML document:
Let’s step through this code one line at a time:
First, we import the class
django.httpmodule, along with Python’s
Next, we define a function called
current_datetime. This is the viewfunction. Each view function takes an
HttpRequestobject as its first parameter, which is typically named
Note that the name of the view function doesn’t matter; it doesn’t have tobe named in a certain way in order for Django to recognize it. We’recalling it
current_datetimehere, because that name clearly indicateswhat it does.
The view returns an
HttpResponseobject thatcontains the generated response. Each view function is responsible forreturning an
HttpResponseobject. (There areexceptions, but we’ll get to those later.)
Django’s Time Zone
Django includes a
TIME_ZONE setting that defaults to
America/Chicago. This probably isn’t where you live, so you might wantto change it in your settings file.
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Mapping URLs to views¶
So, to recap, this view function returns an HTML page that includes the currentdate and time. To display this view at a particular URL, you’ll need to create aURLconf; see URL dispatcher for instructions.
Django provides help for returning HTTP error codes. There are subclasses of
HttpResponse for a number of common HTTP status codesother than 200 (which means “OK”). You can find the full list of availablesubclasses in the request/responsedocumentation. Return an instance of one of those subclasses instead of anormal
HttpResponse in order to signify an error. Forexample:
There isn’t a specialized subclass for every possible HTTP response code,since many of them aren’t going to be that common. However, as documented inthe
HttpResponse documentation, you can also pass theHTTP status code into the constructor for
HttpResponseto create a return class for any status code you like. For example:
Because 404 errors are by far the most common HTTP error, there’s an easier wayto handle those errors.
When you return an error such as
HttpResponseNotFound,you’re responsible for defining the HTML of the resulting error page:
For convenience, and because it’s a good idea to have a consistent 404 error pageacross your site, Django provides an
Http404 exception. If you raise
Http404 at any point in a view function, Django will catch it and return thestandard error page for your application, along with an HTTP error code 404.
In order to show customized HTML when Django returns a 404, you can create anHTML template named
404.html and place it in the top level of yourtemplate tree. This template will then be served when
DEBUG is setto
True, you can provide a message to
Http404 andit will appear in the standard 404 debug template. Use these messages fordebugging purposes; they generally aren’t suitable for use in a production 404template.
Customizing error views¶
The default error views in Django should suffice for most Web applications,but can easily be overridden if you need any custom behavior. Specify thehandlers as seen below in your URLconf (setting them anywhere else will have noeffect).
page_not_found() view is overridden by
server_error() view is overridden by
permission_denied() view is overridden by
bad_request() view is overridden by
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CSRF_FAILURE_VIEW setting to override the CSRF errorview.
Testing custom error views¶
To test the response of a custom error handler, raise the appropriate exceptionin a test view. For example:
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As well as being synchronous functions, views can also be asynchronous(“async”) functions, normally defined using Python’s
asyncdef syntax.Django will automatically detect these and run them in an async context.However, you will need to use an async server based on ASGI to get theirperformance benefits.
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Here’s an example of an async view:
You can read more about Django’s async support, and how to best use asyncviews, in Asynchronous support.