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The security of the system depends on machine settings that were generally changed daily, based on secret key lists distributed in advance, and on other settings that were changed for each message. The receiving station would have to know and use the exact settings employed by the transmitting station to decrypt a message.
The construction of boats is a similar activity called boat building. The dismantling of ships is called ship breaking. The earliest evidence of maritime transport by modern humans is the settlement of Australia between 50,000 and 60,000 years ago. This almost certainly involved rafts, possibly equipped with some sort of sail.
Boat building is the design and construction of boats (instead of the larger ships) — and their on-board systems. This includes at minimum the construction of a hull , with any necessary propulsion, mechanical, navigation, safety and other service systems as the craft requires.
Ancient boat building methods can be categorized as one of hide, log, sewn, lashed-plank, clinker (and reverse-clinker), shell-first, and frame-first. While the frame-first technique dominates the modern ship construction industry, the ancients relied primarily on the other techniques to build their watercraft. In many cases, these techniques ...
You Must Build a Boat is a 2015 puzzle-role-playing game developed by Luca Redwood under the developer name EightyEight Games. It is a sequel to 10000000 and was released for Microsoft Windows , Mac OS X , Android , and iOS in June 2015.
Used for building new boats. Fitting-out bunkers; After launch, many U-boats were fitted-out under their protection. Shelter for operational boats and repair bunkers; This was the most numerous type. There were two types that were built either on dry land or over the water.
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Strip-built, or "strip-plank epoxy", is a method of boat building. [1] Also known as cold molding, the strip-built method is commonly used for canoes and kayaks, but also suitable for larger boats. The process involves securing narrow, flexible strips of wood edge-to-edge around temporary formers.