The navigation of the Tallapoosa River –- which has its source in Paulding County, Georgia, and is about long -– is prevented by shoals and a fall at Tallassee, a few miles north of its junction with the Coosa.

During World War II, US Coast Guard LORAN Unit 92, a radio navigation station built in the summer and fall of 1944, and operational from mid-November 1944 until mid-May 1945, was located on Gardner Island's southeast end.

As the tobacco plantations along the James River were dependent upon shipping, the area above the head of navigation at the fall line had not yet been settled.

Though the Shannon has always been important for navigation in Ireland, there is a fall of only 18 m ( 60 ft ) in the first 140 miles.

In the 1950s traffic began to fall and low fixed bridges would have replaced opening bridges but for the actions of the Inland Waterways Association of Ireland which persuaded the Tánaiste to encourage passenger launches, which kept the bridges high enough for navigation.

In some countries, military engineers may also perform non-military construction tasks in peacetime such as flood control and river navigation works, but such activities do not fall within the scope of military engineering.

Upstream from the fall line, which marked the western reaches of the coastal plain of Virginia ( and adjacent areas of North Carolina ), canals and other improvements were constructed to aid navigation upriver by batteaux and other watercraft.

Prior to the actual construction of the navigation, there had been almost 120 years of proposals for such a scheme, and opposition from the port of Maldon, which anticipated that its revenues would fall if vessels could travel to Chelmsford.

The estuary is a highly dynamic environment, ranging from the high outflows of freshwater during the spring freshet, to the low outflow and rising saltwater content during the summer period, to fall ocean storms and nor ' easters which reshape the barrier islands and the old river channel which forms the navigation channel for ocean-going ships heading to ports at Chatham and Newcastle, to the winter covering of sea ice which encases the entire estuary.

Before navigation improvements such as locks, the fall line was often the head of navigation on rivers due to rapids and waterfalls, such as the Great Falls of the Potomac River.

The name " Savannah " comes from a group of Shawnee who migrated to region in the 1680s, destroyed the Westo and occupied the former Westo lands at the Savannah River's head of navigation on the fall line, near present day Augusta.

On July 9, 1863, after hearing of the fall of Vicksburg, the Confederate garrison of Port Hudson surrendered, opening the Mississippi River to Union navigation from its source to the Gulf of Mexico.

A 14-man party led by Ewing Young which included Jonathan J. Warner in the fall of 1832 trapped the Kings River " up to and some distance into the mountains and then passed on to the San Joaquin River, trapped that river down to canoe navigation in the foothills, where a canoe was made ...".

By 1958, the celestial navigation system used by the Snark allowed its most accurate test, which appeared to fall four nautical miles ( 7. 4 km ) short of the target.

The now-disused pivot pier was removed by dynamite blasting three months later, after the fall fish run, and with that final step the navigation channel was widened from to.

It was a 13-mile ( 21-kilometre ) long mule-and-gravity powered line that connected the Midlothian coal mines with wharves that were located at the head of navigation on the James River just below the fall line at Manchester ( on the south bank directly across from Richmond ).

At Richmond, Virginia, location of the fall line at the head of navigation, the generally west-to-east course of the James River turns almost due south for a distance of about 7 miles ( 10 km ) before turning eastward again towards the Chesapeake Bay.

At this time, the decision had been reached to locate the capital at or adjacent to Georgetown, which was a short distance below the fall line and the farthest inland point for navigation.

Determining the present location of Amundsen's tent requires consideration of the precision of Amundsen's navigation in 1911, the flow of ice since then, and the amount of burial by intervening snow fall.

Early developments along the east coast of the colonies tended to end at the fall line ( the head of navigation ) of the rivers that emptied into the Atlantic directly ( e. g., the Hudson River ) or into its great Bays ( e. g., the Delaware and the Chesapeake ).

When the fall of the South Vietnamese government was imminent, Station Con Son was directed to stay on the air until the last possible minute to provide navigation signals to aircraft and ships fleeing South Vietnam.

* Maritime police ( namely technical-administrative maritime police ), including the discipline of maritime navigation and the regulation of the events that are carried out in the maritime areas that fall under the national sovereignty, the control of the maritime traffic, the manoeuvre of the ships and the safety in the ports, inquiries on the maritime accidents, the control on the maritime State property, the testing and periodic inspections of coastal deposits and other hazardous installations.

Studies on migration have attempted to answer questions on the evolution of migration, orientation and navigation.

Studies of bird migration including aspects of navigation, orientation and physiology are often studied using captive birds in special cages that record their activities.

* In Animal navigation, turning the body to a desired heading, e. g. in the correct direction of migration

For Upper Bonnington, the first dam built on the river, the original goal was to improve navigation between Kootenay Lake and the Kootenay's mouth on the Columbia by drowning the dangerous Bonnigton Falls rapids that also blocked fish migration, and hopefully introducing fish to the upper river by constructing a fish ladder.

A subset of Stone Age humans, including Ngaro Aborigines, developed ocean-worthy outrigger canoe technology, leading to an eastward migration across the Malay archipelago, across the Indian ocean to Madagascar and also across the Pacific Ocean, which required knowledge of the ocean currents, weather patterns, sailing, celestial navigation, and star maps.

* Hasler AD and Scholtz AT ( 1978 ) " Olfactory imprinting and homing in salmon: Investigations into the mechanism of the imprinting process Pages 356_369 in Animal migration, navigation, and homing, Springer-Verlag.

They were even said to be from Japan or Korea, while others suggest a more complex migration that started in southeast Tibet, a migration to Thailand, Burma, or Japan, then a navigation of the Ayeyarwady River and Chindwin rivers, a crossing of the Patkoi range coming back west, and finally entering ancient India.

In 1725 first school in Eastern Siberia, attached to Voznesensky monastery, was opened, in 1754 – sea ( navigation ) school and secondary schools were opened.

Just three years later the Eastern Counties Railway reached Cambridge, and the navigation declined rapidly.

Tolls reached a record £ 1, 728 in 1845, when over 15, 000 tonnes of coal were carried, but the arrival of the railways, in the form of a line from Norwich to Brandon, and an extension of the Eastern Counties Railway from Newport to Brandon, both opened on the same day in 1845, started the rapid decline of the navigation.

The Luftwaffe, finally realising that the British had been deploying countermeasures from the very first day that the system was used operationally completely lost faith in electronic navigation aids ( as the British government had predicted ), and did not deploy any further system against Britain, although by this time Hitler's attention was turning toward Eastern Europe.

A corps feasibility study to investigate improvements for the canal and the Baltimore connecting navigation channels of Tolchester, Brewerton Eastern Extension, and Swan Point was completed in December 1996 with the signing of the chief of engineers ' report.

He explored the Eastern and Western Deserts, relying only on his own resources, learning desert navigation, meeting and talking history with Arab tribesmen.

Due to experiences with jamming during Vietnam and Middle Eastern wars in late 1960s by US-built aircraft, the Soviets have designed an alternative guidance mode for their S-75 ( SA-2 ) missiles, which allowed them to home onto the source of the jamming if normal forms of navigation failed.

-Catholic Church ( various articles on history, hierarchy, theology, sacraments, Mariology, Doctors of the Church, Pope Benedict XVI, papal documents, Eastern Catholic Churches, Eastern rites, liturgical traditions ) ( see " Catholic Church " navigation box ( below ))

-Eastern Catholic Churches and Eastern rites ( various articles ) ( see " Catholic Church " navigation box ( below ))

His charts of the North American northwest coast were so extremely accurate that they served as the key reference for coastal navigation for generations.

The Arctic Bridge shipping route is hoped to link North America to market s in Europe and Asia using ice-free routes across the Arctic OceanThe longer periods of ice-free navigation and the reduction of Arctic Ocean ice coverage have led to Russian and Canadian interest in the potential for commercial trade routes across the Arctic and into Hudson Bay.

Although the old town bridge there restricts navigation to craft with an airdraft of less than, its quay beyond that abruptly changes the nature of the river from a gentle rural feature to a gateway to the North Sea.

It is the limit of Broads navigation for larger boats, but small boats, and especially non-powered boats, can travel on the North Walsham & Dilham Canal until Honing.

For example the Wide Area Augmentation System ( WAAS ) operated by the Federal Aviation Administration is used as a precision navigation tool for commercial aviation in North America.

It was opposed by the inhabitants of Worstead and Dilham, who feared that their businesses would collapse if boats could reach North Walsham, but the navigation was nevertheless authorised by an Act of Parliament dated 5 May 1812, which created the Company of Proprietors of the North Walsham and Dilham Canal Navigation.

The Magnetic North Pole wanders, but slowly enough that a simple compass remains useful for navigation.

Whilst the lower reaches of the River Havel provide the most direct route to Hamburg and the North Sea ports, variable water levels in the River Elbe affect those in the lower River Havel, and together these can restrict navigation.

The Manchester Ship Canal is a river navigation 36 miles ( 58 km ) long in the North West of England.

* Men might as well project a voyage to the Moon as attempt to employ steam navigation against the stormy North Atlantic Ocean.

In stellar navigation, the reference direction is that of the North Star, Polaris.

Recent research conducted by East Carolina University, Greenville and Pitt County historians has uncovered documentation noting that before the Civil War, the North Carolina Legislature had appropriated funds to construct dams and locks on the Tar River in an attempt to facilitate almost year round navigation for the farm products and naval stores shipping plus passenger boats which were travelling between Tarboro, through Greenville to Washington.

The navigation signal allows the airborne receiving equipment to determine a magnetic bearing from the station to the aircraft ( direction from the VOR station in relation to the Earth's magnetic North at the time of installation ).

Historically, this set of stars was used in navigation to locate the North Star Polaris.

:" What is called the North River is a narrow and long bay, which in its northwardly course from the harbor of New York breaks through or turns all the mountains, affording a tide navigation for vessels of eighty tons to Albany and Troy, one hundred and sixty miles above New York.

The most famous demonstration of the new technology was through the record-breaking flight of British aviator Sheila Scott, who tested the Nimbus navigation and locator communication system when she made the first-ever solo flight over the North Pole in 1971.

A natural north-south navigation route — admittedly with a number of portages round dangerous rapids — extends from Hudson Bay up Nelson River ( or the Hayes River, as preferred by early modern traders from York Factory ) through Lake Winnipeg, then up the Red River of the North.

The strait is a major navigation channel on the west coast of North America, owing to the presence of the port of Vancouver, and also due to its role as the southern entrance to the infracoastal route known as the Inside Passage.

22 ( Photographic ) Wing, 1947 to 1949, which photographed, surveyed and charted approximately one-third of the country, and discovered the precise location of the Magnetic North Pole, crucial to air and sea navigation in the northern hemisphere.

The first segment of the canal was constructed as a salt water navigation canal in 1806, from Madras North to Ennore.

The North Star can even be seen slightly south of the Equator ( because of atmospheric refraction ); further south, it cannot be used for navigation.

The North Star has historically been used for navigation since Late Antiquity, both to find the direction of north and to determine latitude.