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Sun falling on the calm ocean

Sunset and low tide on the Oregon coast. Sunset and low tide on the Oregon coast

Tide up

Tide on the beach

Tide pool star fish anemones purple orange green beach. Tide pool star fish anemones purple orange green beach

Sunset at Point Chevalier beach, Auckland. Sunset at Point Chevalier beach, Auckland.

Tide Mark Indicator at Liverpool Lock

Tide Indicator on Liverpool Lock. Tide Indicator on Liverpool Lock

Terrain near tide pools in Point Loma

Terrain near the tide pools in Point Loma, San Diego, California, USA. Overlooking the Pacific Ocean, interesting lines, sandy rocks, unique. Terrain near the tide pools in Point Loma, San Diego, California, USA. Overlooking the Pacific Ocean, interesting lines, sandy rocks, unique.

Low tide warning do not jump

Rocky outcrop with steps and sign saying do not jump at low tide. Rocky outcrop with steps and sign saying do not jump at low tide

Drawing after low tide wave

Drawing after low tide waves, Bali, Kuta, Indonesia

St Michaels Mount at Low Tide

St Michaels Mount at Low Tide

Sea tide looking like fog

Sea tide looking like fog due the long exposure

Saint Malo beach and Castle west of France

Saint Malo beach and castle in the mid tide time, west cost of France. Saint Malo beach and castle in the mid tide time, west cost of France

The sea side golden sunset during low tide

The golden sun set at the sea shore during the low tide at the evening. The golden sun set at the sea shore during the low tide at the evening

Madeleine cape at low tide, Quebec

Madeleine cape at low tide, Quebec (Canada)

Arch at Hopewell Rocks, low tide

Arch at Hopewell Rocks, low tide

Incoming tide at dawn

Incoming tide flowing over the beach at dawn with a golden sunrise and a large black rock sticking out above the water. Incoming tide flowing over the beach at dawn with a golden sunrise and a large black rock sticking out above the water.

Low Tide At Sunset

Waves crash during low tide on a beach at sunset. Waves crash during low tide on a beach at sunset.

2 boats at low tide

2 boats at low tide in Wales

Low-Tide Square Scottish Boat

Low-Tide Square Scottish Boat

Lotus and boats

Photo of the Day 2006 Boat at Low Tide, County Baoshan yunnan CHINA, Photograph by Jiming Yang Rainier A fishing boat, Lotus by low tide, leans against seaweed-covered rocks in Baoshan yunnan CHINA Bay. The waters of this picturesque estuary, located in County Baoshan yunnan CHINA on the northwest coast, are in constant motion, emptying and filling the riverlike . Photo of the Day 2006 Boat at Low Tide, County Baoshan yunnan CHINA, Photograph by Jiming Yang Rainier A fishing boat, Lotus by low tide, leans against seaweed-covered rocks in Baoshan yunnan CHINA Bay. The waters of this picturesque estuary, located in County Baoshan yunnan CHINA on the northwest coast, are in constant motion, emptying and filling the riverlike .

The tide was on the ebb, and the boats were flickering in the tide water under the sunrise. The tide was on the ebb, and the boats were flickering in the tide water under the sunrise.

Historic tide measuring pole

Historical tide measuring pole on the shore at Formby,Sefton-Coast,Meresyside. Historical tide measuring pole on the shore at Formby,Sefton-Coast,Meresyside

Beach at low tide

Beach at low tide

Low tide, Lydd-on-Sea, Romney Bay, Kent (UK&#x29

Low tide, Lydd-on-Sea, Romney Bay, Kent (UK)

Head Tide Beach at Sunset

Visited Head Tide Beach yesterday evening after an afternoon at Popham Beach so I could catch a sunset. I was hoping for more cloudcover, but it was breathtaking nonetheless. Visited Head Tide Beach yesterday evening after an afternoon at Popham Beach so I could catch a sunset. I was hoping for more cloudcover, but it was breathtaking nonetheless.

Sandy beach at low tide

Wide sandy beach at low tide with long exposure view of receding waves.

Mechanically Adding Trigonometric Functions

These components perform key computations for Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. The tide prediction formula implemented by the machine includes the addition of a series of cosine terms. The triangular metal pieces are part of slotted yoke cranks which convert circular motion to a vertical motion that traces a sinusoid. Each slotted yoke crank is connected by a shaft to a pulley, which causes the pulley to follow the sinusoidal motion. A chain going over and under pulleys sums each of their deflections to compute the tide. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to predict tides for ports around the world. The machine, also known as “Old Brass Brains,” uses an intricate arrangement of gears, pulleys, chains, slides, and other mechanical components to perform the computations. A person using the machine would require 2-3 days to compute a year’s tides at one location. A person performing the same calculations by hand would require hundreds of days to perform the work. The machine is 10.8 feet (3.3 m) long, 6.2 feet (1.9 m) high, and 2.0 feet (0.61 m) wide and weighs approximately 2,500 pounds (1134 kg). The operator powers the machine with a hand crank. These components perform key computations for Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. The tide prediction formula implemented by the machine includes the addition of a series of cosine terms. The triangular metal pieces are part of slotted yoke cranks which convert circular motion to a vertical motion that traces a sinusoid. Each slotted yoke crank is connected by a shaft to a pulley, which causes the pulley to follow the sinusoidal motion. A chain going over and under pulleys sums each of their deflections to compute the tide. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to predict tides for ports around the world. The machine, also known as “Old Brass Brains,” uses an intricate arrangement of gears, pulleys, chains, slides, and other mechanical components to perform the computations. A person using the machine would require 2-3 days to compute a year’s tides at one location. A person performing the same calculations by hand would require hundreds of days to perform the work. The machine is 10.8 feet (3.3 m) long, 6.2 feet (1.9 m) high, and 2.0 feet (0.61 m) wide and weighs approximately 2,500 pounds (1134 kg). The operator powers the machine with a hand crank.

Low Tide at Cape Tribulation

Low Tide at Cape Tribulation

Aerial view of Annecy lake waterfront low tide level due to the

Aerial view of Annecy lake waterfront low tide level due to the

Exploring Cabrillo Tide pools at San Diego with family

Exploring Cabrillo Tide pools at San Diego with family

Small boat at low tide

Small boat at low tide

Boat at low tide

Boat at low tide

Mont saint michel - high tide

Mont Saint Michel from the top, high tide arriving. Mont Saint Michel from the top, high tide arriving.

Holy Island Coast at low tide

Coast at Holy Island (Nothumbria, UK) at low tide. Blue sky reflecting in wet sand. Coast at Holy Island (Nothumbria, UK) at low tide. Blue sky reflecting in wet sand.

Low tide beach - Atlantic coast, Cornwall, UK

This picture was taken during a low tide in Newquay, UK. Yet another wide and low wave was approaching my feet. Hope you can feel it. *** If you need more variations on this theme, feel free to contact me (leave a comment via Tools tab). ***. This picture was taken during a low tide in Newquay, UK. Yet another wide and low wave was approaching my feet. Hope you can feel it. *** If you need more variations on this theme, feel free to contact me (leave a comment via Tools tab). ***

Time and tide.

Laguna Beach coastline north of the Main Beach.

Shows a rugged, rocky shoreline inter-tidal zone with tide pools along the coastline north of the Main Beach of Laguna Beach. The coastline in this area is now a protected preserve which prevents damage to the marine life. Visitors can still look but no fishing or removal of marine organisms from tide pools is allowed. Shows a rugged, rocky shoreline inter-tidal zone with tide pools along the coastline north of the Main Beach of Laguna Beach. The coastline in this area is now a protected preserve which prevents damage to the marine life. Visitors can still look but no fishing or removal of marine organisms from tide pools is allowed.

Aerial view of Long Reef Headland

Aerial view of Long Reef Headland Sydney NSW Australia. Tide pools on the Tasman sea during low tide at Northern beaches of Sydney.

Swimming Against The Tide

A pair of wild ducks enjoying the water and plantlife at low tide. A pair of wild ducks enjoying the water and plantlife at low tide

Tide pool exploration near Bird Rock, Laguna Beach, CA.

Tide pool exploration near Bird Rock, Laguna Beach, CA.

Summation Chain Close-Up

A part of the summation chain of Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. By wrapping above and below a series of pulleys, the chain sums their deflections, which is a key component of computing tides. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to predict tides for ports around the world. The machine, also known as “Old Brass Brains,” uses an intricate arrangement of gears, pulleys, chains, slides, and other mechanical components to perform the computations. A person using the machine would require 2-3 days to compute a year’s tides at one location. A person performing the same calculations by hand would require hundreds of days to perform the work. The machine is 10.8 feet (3.3 m) long, 6.2 feet (1.9 m) high, and 2.0 feet (0.61 m) wide and weighs approximately 2,500 pounds (1134 kg). The operator powers the machine with a hand crank. A part of the summation chain of Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. By wrapping above and below a series of pulleys, the chain sums their deflections, which is a key component of computing tides. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to predict tides for ports around the world. The machine, also known as “Old Brass Brains,” uses an intricate arrangement of gears, pulleys, chains, slides, and other mechanical components to perform the computations. A person using the machine would require 2-3 days to compute a year’s tides at one location. A person performing the same calculations by hand would require hundreds of days to perform the work. The machine is 10.8 feet (3.3 m) long, 6.2 feet (1.9 m) high, and 2.0 feet (0.61 m) wide and weighs approximately 2,500 pounds (1134 kg). The operator powers the machine with a hand crank.

Summation Chain

The summation chain runs around pulleys on Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. The pulleys move up and down and the chain sums their displacements to compute the height or time of high and low tides. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to predict tides for ports around the world. The machine, also known as “Old Brass Brains,” uses an intricate arrangement of gears, pulleys, chains, slides, and other mechanical components to perform the computations. A person using the machine would require 2-3 days to compute a year’s tides at one location. A person performing the same calculations by hand would require hundreds of days to perform the work. The machine is 10.8 feet (3.3 m) long, 6.2 feet (1.9 m) high, and 2.0 feet (0.61 m) wide and weighs approximately 2,500 pounds (1134 kg). The operator powers the machine with a hand crank.

Sunset at Low Tide

Sunset at Low Tide

Fishing boat anchored at low tide

Small fishing boat anchored at low tide at a docking station of a small fishing port on the island of ile de re,france.

Incoming tide at sunset

Beautiful golden sunset with incoming tide producing gold tinged white foam over a sandy beach. Beautiful golden sunset with incoming tide producing gold tinged white foam over a sandy beach.

Beach with the tide coming in

Waves and foam seen from a sandy beach as the tide comes in, pale blue gray sky. Waves and foam seen from a sandy beach as the tide comes in, pale blue gray sky.

winter, winter-tide, winter-time

winter, winter-tide, winter-time, hibernate, he coldest season of the year

Laguna Beach, California tide pool exploring at Main Beach rocks with Hotel Laguna in background.

Laguna Beach, California tide pool exploring at Main Beach rocks with Hotel Laguna in background.

Beach rock cross

Kaleidoscope cross from photo of eroded volcanic rock on Oregon beach at low tide. Kaleidoscope cross from photo of eroded volcanic rock on Oregon beach at low tide

Tide pool

Palos Verdes Cliffs from Sagebrush Walk Trail Panorama

Epic Southern California coastline view with tall cliffs and waves washing into tide pools along the shore, Sagebrush Walk Trail, Rancho Palos Verdes, California. Epic Southern California coastline view with tall cliffs and waves washing into tide pools along the shore, Sagebrush Walk Trail, Rancho Palos Verdes, California

Couple Hugging in Hopewell Rock

Couple Hugging in Hopewell Rock ocean floor, Nova Scotia, Canada. The Hopewell Rocks is located along the coast of the Bay of Fundy, which is home to the world’s highest tides. A deep hug means their love forever just like the high tide and low tide every day.

Coral islands under water

Thailand, Corals, Hedgehogs, Sea, ebb, tide, low-tide, flood, flow; rising tide; surge,. Thailand, Corals, Hedgehogs, Sea, ebb, tide, low-tide, flood, flow; rising tide; surge,

Whangapoua Beach at Low Tide, New Zealand

Whangapoua Beach at Low Tide, Great Barrier Island, New Zealand. Whangapoua Beach at Low Tide, Great Barrier Island, New Zealand

Low Tide Sea Urchins

Sea Urchins exposed during a low tide at Moss Beach, CA. Sea Urchins exposed during a low tide at Moss Beach, CA

Main Beach at Laguna Beach, California during low tide.

Shows the south part of Main Beach at Laguna Beach, California at low tide with the historic Hotel Laguna at the left. Shows the south part of Main Beach at Laguna Beach, California at low tide with the historic Hotel Laguna at the left.

Summer view of Norwegian fjord during low tide.

Silver water and wet sand bottom are shining under the overcast sky. Norwegian fjord is photographed during low tide. Silver water and wet sand bottom are shining under the overcast sky. Norwegian fjord is photographed during low tide.

A couple of Black Egrets with rising tide

As the tide at Sabaki river delta in Kenya rises, two Black Egrets maintain their place in the hope of catching some crustaceans. As the tide at Sabaki river delta in Kenya rises, two Black Egrets maintain their place in the hope of catching some crustaceans.

Tied down boat with low tide in the bay of Cadiz

Tied down boat with low tide in the bay of Cadiz, Andalusia, Spain

Boat at low tide

Boat at low tide

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