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August 2019

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Subject:
From:
Flemming Joergensen <[log in to unmask]>
Reply To:
SAC-SWG-ENUM <[log in to unmask]>
Date:
Thu, 22 Aug 2019 05:27:11 -0400
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Thanks for the feedback.

I used to sail on containerships, so I naively assumed that everyone knew what a "20 ft" container is and I see why you don't think the length describes the size.
Here is a short description concering size and types of containers.

Shipping containers comes in standard sizes and types. They are usually described by their length and a suffix if relevant.
Width: Containers are always 8' wide
Height: A standard container is 8'6" high and a "high cube" is 9'6" high.

I have only included a few standard containers in the CR, but there are several types of containers for different types of cargo such as:
"Reefer" -refrigerated containers for e.g. food and medical products.
"Tank" -containers for liquids.
"Open top" -containers for special sized cargo or cargo, which need some kind ventilation.

A few examples of Length x Width x Height:
A "20 ft container" is 20' x 8' x 8'6"
A "40 ft high cube" is 40' x 8' x 9'6"
A "40 ft reefer" is 40' x 8' x 8'6"

Certain types are always a high cube's, such as the "45 ft" container, which is 45' x 8' x 9'6".

Containerships usually carries 20, 40, 45 and 48 ft containers of different types.
The 10 ft container, is normally used by supply ships for cargo to oil platforms.


There is a page on wiki about containers:
https://en.wikipedia.org/wiki/Intermodal_container

Here is a description of some of the common container types:
https://www.hapag-lloyd.com/en/products/fleet/container.html


Regarding Franks comments:

4. Containers are made of steel such as Cor-Ten steel, see https://en.wikipedia.org/wiki/Weathering_steel
The "open top" containers normally have a canvas covering the top, but I think this type will sink rather fast.

6. Agree. Using the Variable Record for mass, heading, pitch, roll, appearance etc. sounds sufficient to cover what is described in 1. 2. 3. and 5.

7. Agree. We just insert the container as a "ship" with a max speed of 0 knots and appropriate draft.

8. We do not have a need for simulating the container falling overboard from a ship.


If it helps, the name of the Category could be changed to "Shipping Container" to clarify that these are "standard" shipping containers.

Regards
Flemming Joergensen

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