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UKW Drehfunkfeuer, im Hintergrund TACAN (militärisches Navigationssystem)
Tempelhofer Feld, Berlin
53937
This octagonal tower is situated on the North Pier at Bridlington, With its three lights it guides mariners into the Harbour during the hours of darkness,
34046 'Braunton' crosses with Weaver Navigation with 1Z10 0702 Crewe - Carlisle 'Settle & Carlisle Fellsman'. Preserved steam tug 'Daniel Adamson' is at her regular mooring for summer sailing along the Weaver 18/05/22.
The High and Low Lights of North Shields are decommissioned leading lights in North Shields, Tyne and Wear in the United Kingdom. Two pairs of lights survive: the older pair date from 1727 and were operational until 1810; the newer pair then took over, remaining in use until 1999. All four are listed buildings. They were sometimes known as the Fish Quay High and Low Lights, or (more precisely in terms of their individual locations) as 'Fish Quay (Range front)' and 'Dockwray Square (Range rear)'
The first lighthouses were erected here in the 16th century by the Guild of the Blessed Trinity of Newcastle-upon-Tyne. By following a course which kept the two lights aligned, pilots were able to navigate along the Tyne, avoiding the dangerous Shields Bar and the Black Middens.
These old Riverside Buildings are seen at the Towns Riverhead ..The Driffield Navigation is an 11-mile waterway, through the heart of the Holderness Plain to the market town of Driffield, East Riding of Yorkshire, England. .It was first opened in 1770..
Sextant et tables de calculs.
Objets et instruments anciens de navigation.
This english sextant is about 120 years old.
Navigation Street, Birmingham, United Kingdom
I discovered this bridge by pure chance while wandering around the new Birmingham New Street Station.
On the Calder and Hebble Navigation. No idea why the bridge is called this, it's nowhere near Beeston.
Walking Birmingham Canals in July 2021. This is about a mile out of Gas Street Basin on the Wolverhampton main line of Birmimgham Canal Navigations. Going under the bridge on the left is the Icknield Port Loop, whilst on the right hand edge of the photo is the start of the Soho Loop.
The Birmingham to Wolverhampton main line canal, constructed between 1768 and 1772 to the design of James Brindley. Merger with the Birmingham & Fazeley Canal in 1784 created a combined company that ten years later renamed itself as the Birmingham Canal Navigations, eventually having some 160 miles of waterway, 100 miles or so of which remains in use.
Although none are in view here, on this hot day there were numerous craft on these 'narrow' canals, the majority being fairly traditional narrow boats of 60 or 70 foot length.
The Diemelsee or Diemel Reservoir (German: Diemelstausee) is a reservoir with a surface area of 1.65 km²[1] and about capacity of 19.9 million m³[1] on the River Diemel in the counties of Waldeck-Frankenberg in North Hesse, and Hochsauerlandkreis, Westphalia, Germany.
It is part of the Diemeltalsperre hydropower system (DiT)[3] comprising the Diemel Dam, the equalizing basin, the power plant and the reservoir itself, owned by the Federal Waterway and Navigation Authority and managed by its Hann. Münden office. The Diemel Reservoir, along with the Edersee is part of the water regulation structure in the catchment area of the River Weser.
This is the point where The River Hull flows into the River Humber..Taken from the top floor of Hulls award winning Aquarium "The Deep"..This Area is known as "Sammys Point"
I'm going to crawl out of my hole of darkness and despair and maybe try to see through a different light today despite the 4" of snow we received last night after a forecast of less than an inch.
We are fortunate as photographers and/or artists to have developed a way of seeing things differently and many of us have extrapolated that seeing into other aspects of our lives.
We may experience some very difficult times ahead, but right now we have the ability to share our ways of seeing - the world around us however restricted with those whose worlds have been totally upended and could use a view of a wide open landscape or spring flowers blooming, or whatever brightens your day.
I want to thank all of my photographer/artist friends who have helped me to develop my eye and keep incredible imagery in front of my face on Facebook, Instagram and Flikr on a daily basis.
And here is a shout out to those who are keeping us connected. Thanks to my grandson who despite yesterday's earthquake in SLC goes to work to climb cell phone towers to keep us all connected.
Chronomètre de marine
Il fut un temps où les navigateurs devaient transporter l'heure avec eux. Le chronomètre de marine était un instrument de haute précision. Réglé au départ, on connaissait sa marche, avance ou retard. Il était remonté une fois par jour.
Toute erreur dans l'heure devenait une erreur de longitude. A raison de environ 1,5 km pour 4 secondes d'erreur du chronomètre. Dans certains ports, des observatoires astronomiques permettaient de connaître l'erreur.
A l'époque de Cook ou Lapérouse, ils finissaient par avoir des erreurs de plusieurs minutes de temps (>100km en longitude)
Quand ils pouvaient, ils pratiquaient des observations de distances lunaires. Après de savants calculs, ils connaissaient l'heure avec la précision de la minute soit 15 à 30km d'erreur sur la longitude.
Jusque dans les années soixante, on trouvait encore sur les cartes des îles mal placées en longitude. Il m'est arrivé d'en signaler au Service hydrographique de la Marine...