View allAll Photos Tagged navigation
You might want to see the difference between "old and modern" navigation. Then check out this image:
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What's better..?? I leave this open for present and future seaman to answer. (Believe i know the answer......)
Dall-E3 - PS Beta
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,
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..
The Gantocks are a small group of rocks lying off Dunoon in the Firth of Clyde. A 44 feet (13 metres) tall navigation beacon was constructed on the rocks in 1886 after several ships ran aground.
Despite the beacon, vessels continue to collide with the rocks.
The MV Akka was lost after grounding on the Gantocks on 9 April 1956. The PS Waverley grounded on 15 July 1977, with 715 passengers on board.
On the horizon are three islands: Little Cumbrae, Arran and Bute (left to right).
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Repent, and turn yourselves from all your transgressions; so iniquity shall not be your ruin.
(Ezekiel 18:30)
Sextant et tables de calculs.
Objets et instruments anciens de navigation.
This english sextant is about 120 years old.
On the Calder and Hebble Navigation. No idea why the bridge is called this, it's nowhere near Beeston.
Delivered as a HC-144A but upgraded in 2022 to HC-144B standard, which encompasses the Ocean Sentry Refresh (OSR) modifications (installation of a new flight management system, which serves as the primary avionics computer for communication control, navigation and equipment monitoring) and the Minotaur mission system, which integrates installed sensors and radar and provides dramatically improved data fusion as well as information-processing and sharing capabilities.
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.
Blazing morning sunrise behind small beacon or lighthouse on the rocky island in front of Suomenlinna fortress island on an extremely cold winter morning at sunrise with sea fog and icy Baltic sea, the Suomenlinna church (Suomenlinnan kirkko) & lighthouse on the background in Helsinki, Finland.
Copyright Mikko Palonkorpi.
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"
Manakara (Madagascar) - Le canal des Pagalanes, a été creusé au début du siècle dernier par les populations locales. Sans engins de travaux publics, uniquement avec de pelles, des pioches et des charrettes tirées par des zébus. Un projet titanesque sur 700 km du gouverneur français de l’époque, le général Galliéni.
Le canal a été progressivement abandonné au profit de la route pour le transport des marchandises. Aujourd’hui, cet axe n’est véritablement navigable que sur 150 km. Faute d’entretien, le reste du canal s’ensable. Seules les pirogues des populations locales qui résident sur les rives des Pagalanes, peuvent l'emprunter. Le faible tirant d’eau de leurs embarcations leur permet de naviguer avec une profondeur n’excédant pas 30 centimètres d’eau. Mais les nombreux bancs de sable qui obstruent l’axe de communication obligent les piroguiers à pousser régulièrement leur embarcations
Navigation on foot
Manakara (Madagascar) - The Pagalanes canal, was dug at the beginning of the last century by the local populations. Without public works machinery, only with shovels, pickaxes and carts pulled by zebus. A titanic 700 km project by the then French governor, General Galliéni.
The canal was gradually abandoned in favor of the road for the transport of goods. So today, this axis is only truly navigable for 150 km. lack of maintenance, the rest of the channel is silted. Only the people who live on the banks of the Pagalanes use it daily.
The shallow draft allows them to their canoes to sail with a depth not exceeding 30 centimeters of water. But the many sand banks which obstruct the communication axis force the boatmen to regularly push their boats
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...