A severe storm is accompanied by extreme wind speeds (20m/s – 30m/s and higher), which cause local generation of very short waves with relatively high wave heights even for the relatively short fetch lengths in a harbour (van der Meer et al., 2002). By determining the appropriate wind class, the user can use AS4055 and other design aids to design dwelling or parts of dwelling for wind load accordingly.

Max size of vessel (m) Wind . /Height 927 Many of these sites have more than twenty five years of data. Should the bridge be closed due to weather conditions or not operable for any other reasons, vessels may berth on the outer harbour pontoons following approval of the Harbour Office. /BitsPerComponent 8

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The wind roses are available for 9am and 3pm for individual months, seasonally and annually. Even if the wind potential appear poor (3.8 m/s for average wind speeds as predicted by many researchers In the event of actual wind speeds of Force 7 and above, the bridge will be closed (not navigable). The classification is a combination of wind region, terrain category, shielding and topography. �� � w !1AQaq"2�B���� #3R�br�

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endobj This is the primary purpose to move the wind generators to offshore sites just to provide more electrical energy from the plant. Wind generated currents are also a frequent feature within the Harbour, with currents reaching about 2% of the wind speed. Delivering effective planning, efficient transport & economic infrastructure to connect the people and places of SA TERRAIN CATEGORY 1.5 Open water surfaces subjected to shoaling waves at serviceability and ultimate wind speeds in all wind regions, e.g.

wind speeds in all wind regions, e.g. In mean wind speeds between 7-10 m/s, the Maritime Administration will make an assessment of the relevant vessel's possibilities to safely maneuver and navigate in port and fairway. �� � } !1AQa"q2���#B��R��$3br� The evaluation will be made as early as possible, but since factors can change quickly, decisions may be made during piloting.The Maritime Administration will make an assessment of the relevant vessel's possibilities to safely maneuver and navigate in port and fairway.

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In general, for wind speeds less than 7 m/s, wind generated currents (typically up to 0.14 m/s) predominate whereas for wind speeds greater than 7 m/s, wave conditions predominate (refer to Section 2.5). This assessment is based on whether the vessel is familiar with the pilot area from earlier, the wind direction, whether it is day or night, and other factors affecting the vessel's performance. 220 x 33 - 260 x 33. Moreover the outer dam has a strong influence on mean speeds of wind increasing them significantly.


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/Width 876 The evaluation will be made as early as possible, but since factors can change quickly, decisions may be made during piloting.Acceptable sight according to judgement done by ships master and pilot.

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