SU4900 : Calshot Spit Light Float

taken 2 years ago, near to Calshot, Hampshire, Great Britain

This is 1 of 2 images, with title Calshot Spit Light Float in this square
Calshot Spit Light Float
Calshot Spit Light Float
The Calshot Spit Light Float dates back to 1842. Several light vessels have been used to mark the navigational hazard of the Spit and aid safe passage of vessels entering Southampton Water. The last Calshot Spit Light Ship was LV78, decommissioned in 1987 and used as a static attraction at Southamptonís Ocean Village Marina (SU4210 : Calshot Spit light vessel) before being transferred to Trafalgar Dock in 2010 (SU4210 : Calshot Spit light vessel on the dockside).

LV78 was replaced with a steel catamaran with a steel lattice superstructure. The catamaran always lies with the tide, enabling pilots bringing large ships into Southampton to see the tidal stream direction (This can be seen in Ian Paterson's photograph SU4900 : Calshot Spit catamaran buoy).

The steel superstructure seen in that photograph was replaced with a 6Ĺ metre tall aluminium self-contained structure in 2015. As well as navigation light and 2-mile omni-directional fog signal, the float is equipped with four 100 watt solar panels and a trial meteorological station to collectweather data which is transmitted every five minutes and can be seen at LinkExternal link (ABP Southampton). Other features include an anchor ball and self-contained anchor light.

The light float is in position 50 48.350' N 001 17.637'W and has a characteristic of Fl W 5s.
LinkExternal link (Maritime Journal).
Southampton Water :: SU4407
Southampton Water is a tidal estuary north of the Solent and the Isle of Wight. Geographically, it is classified as a ria, or drowned valley, of the English Channel. It was formed by the rivers Test, Itchen and Hamble which flow into it, and became an inlet of the sea at the end of the last ice age when sea levels rose, flooding many valleys in the south of England.

The city of Southampton lies at the most northerly point of Southampton Water. Its emergence as a major port, and particularly as a port handling very large vessels, depended partly on certain geographical features of Southampton Water. Its depth, even in its undeveloped state, was generous; this depth of water has been increased over the years with comparative ease since the soft silt of the river-bed allows for easy dredging. An additional factor is the phenomenon of the "double tide", which results in unusually prolonged periods of high water. This greatly facilitates the movements of very large ships.

Together with the Solent, Southampton Water is world-renowned for yachting.

LinkExternal link Wikipedia
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Grid Square
SU4900, 16 images   (more nearby )
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Date Taken
Saturday, 16 July, 2016   (more nearby)
Saturday, 23 July, 2016
Geographical Context
Camera (from Tags)
Panasonic DMC-G7 
Subject Location
OSGB36: geotagged! SU 498 009 [100m precision]
WGS84: 50:48.3495N 1:17.6373W
Camera Location
OSGB36: geotagged! SU 499 008
View Direction
Northwest (about 315 degrees)
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Other Tags
The Solent  Light Float  Buoy  Shipping Channel Buoy  Red Buoy 

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Image Type (about): geograph 
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