![]() One difficulty is that the quay level is low: somewhere of the order of 0.8 to 1.2m. The aesthetics of the works is of great importance in yacht harbours. Height of the breakwater crest above quay level Reflection from quay walls must also be avoided because crews frequently sleep on board and yachts have a frequency of rolling which quickly attunes itself to the wave motion in a harbour. In a yacht harbour there must be calm at all times and especially when there is a swell outside. The cross section of the breakwater can therefore be considerably less massive than in the case of a deep water port.Ī degree of wave motion is tolerated within a commercial port depending upon the size of the ships, type of traffic and frequency with which it is assumed to occur. īecause of the limited depth, the maximum possible wave will have broken before it reaches the harbour.If the port is located on a sandy or muddy coast, or where there is much seaweed, sand bars may form at the entrance or within the harbour. The danger that the port entrance may often be on or closer to the shore than the wave-breaking contour which means that sometimes entry will be impossible. This leads to three considerations of great importance: In order therefore to reduce the cost of the work as much as possible breakwaters and entrances are usually sited where the depth at low water is not more than 4 to 5 m. It is well known that yachts do not exceed 4.5m in draught. It is firstly necessary to identify these features in order to obtain an overall view and then each one is considered separately. This report considers the features peculiar to yacht harbours, discusses the experience gained in attempting to solve the problems posed by them and makes recommendations for the design of such harbours. for example the consideration which should be given for yachts entering a harbour under sail. However, there are aspects of the design which, though of secondary importance in such harbours, are of primary concern in the case of yacht harbours. ![]() Works for the protection of yacht harbours have to be designed in the same way as those for commercial and fishing ports. ![]()
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