There are three principal methods of conveying a new ship from building site to water, only two of which are called "launching". The oldest, most familiar, and most widely used is the end-on launch, in which the vessel slides down an inclined slipway, usually stern first. With the side launch, the ship enters the water broadside. This method came into use in the 19th century on inland waters, rivers, and lakes, and was more widely adopted during World War II. The third method is float-out, used for ships that are built in basins or dry docks and then floated by admitting water into the dock.[2]
Normally, ways are arranged perpendicular to the shore line (or as nearly so as the water and maximum length of vessel allows) and the ship is built with its stern facing the water. Where the launch takes place into a narrow river, the building slips may be at a shallow angle rather than perpendicular, even though this requires a longer slipway when launching.[i] Modern slipways take the form of a reinforced concrete mat of sufficient strength to support the vessel, with two "barricades" that extend well below the water level taking into account tidal variations. The barricades support the two launch ways. The vessel is built upon temporary cribbing that is arranged to give access to the hull's outer bottom and to allow the launchways to be erected under the complete hull. When it is time to prepare for launching, a pair of standing ways is erected under the hull and out onto the barricades. The surface of the ways is greased. (Tallow and whale oil were used as grease in sailing ship days.)[4] A pair of sliding ways is placed on top, under the hull, and a launch cradle with bow and stern poppets is erected on these sliding ways. The weight of the hull is then transferred from the build cribbing onto the launch cradle. Provision is made to hold the vessel in place and then release it at the appropriate moment in the launching ceremony; common mechanisms include weak links designed to be cut at a signal and mechanical triggers controlled by a switch from the ceremonial platform.
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The first phase of construction was on the Northeast section of the park on West Jefferson, completed in 2018. This area is about six acres, three of which were added to the park, this includes a new softball diamond, soccer field, picnic shelter, playground, basketball court and toilet facility. The following year the park was expanded again by an additional three acres on to former city-owned dog pound facility and vacant land, turning the site into parkland with the largest dog park in the city and a 20,000-squarefoot skate park. In 2020 the southeast section of the park was completed, with a renovated picnic area, boat launch, parking, horseshoe and table tennis game area as well as new riverwalk. In addition to all these renovations extensive environmental remediation has taken place, to ensure that the park is safe for all future users.
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In the event of lightening or strong wind, personnel must be evacuated from the barges in the river where the fireworks are launched, and lightening could pose a danger for the crowds of spectators along the river banks as well. 0852c4b9a8
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