Lighthouses

They turn the huge light on top of that thing so they can see that there is a big lighthouse there and also so that the ship don't run into any rocks or things like that!!

ADDED: Many lighthouses also had audible fog-signals, powerful sirens that emitted blasts of sound of similar pattern to the lamp's flashes.

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Portland head Light

Eddystone Rock was the site of the first offshore lighthouse built in Europe. The first of four lighthouses here was built in 1698.

How many sides does a lighthouse have

The purpose of lighthouse was to warning shipping of submerged rocks and other hazards so they need to be sited close to the hazard in a location where they could be seen by ships.

There are two lighthouses on Rottnest Island: Wadjemup lighthouse and Bathurst lighthouse. The original lighthouse on the Wadjemup site was the first lighthouse in Western Australia, whilst the lighthouse that is currently on the site is Australia's first ever rotating beam lighthouse.

Sentinels of Hope and symbols of comfort. While all is storming the lighthouse remains steadfast to guide us safely ashore

In 2014, there are still over 400 lighthouses that are being used. Most of the lighthouses are leased to historical societies and used as tourist attractions.

The primary purpose of a lighthouse keeper is to maintain the light in the lighthouse, to ensure that ships are warned of dangerous rocks and reefs.

They also need to maintain the structure itself that actually holds the lantern. They need to check for wear and tear, paint the tower, and possibly communicate to ships. Many of these tasks are eliminated with modern, automated lighthouses, although maintenance of the building itself is still necessary.

The purpose of a lighthouse is to steer mariners, whilst in dense fog or dark nights, away from cliffs, land and shorelines, coral reefs and other potentially hazardous areas. the lighthouse provides a signal to ships that they are close to such areas. Lighthouses also need to be visible during the day, as they perform the similar function of warning of reefs and underwater hazards such as rocks. The Bell Rock lighthouse off the coast of Scotland, for example, is situated directly on top of a rock which is visible for only a short period of time each day.

Being a resident of South Florida, I can contest the Hillsboro Intel Lighthouse is one of the brightest in the world. More information can be found at the links below. http://www.hillsborolighthouse.org/ http://en.wikipedia.org/wiki/Hillsboro_Inlet_Light

There are numerous sources of power for various lighthouses depending on their location and construction. Diesel powered generators.
Photoelectric arrays storing energy in lead-acid accumulators.
Electric cables from the power grid.
etc.
and combinations of the above,

The lighthouse of Alexandria, also known as the Pharos, was built by the ancient Egyptians. It was built and designed by Sostratus of Knidos. Its initial construction was done under the command of Satrap (governor) Ptolemy I Soter, Egypt's first Macedonian ruler and a general of Alexander the Great, and completed during the reign of his son, Ptolemy Philadelphos.

Bell Rock was notorious for the danger it posed to ships, as it lies just under the surface of the water for all but a few hours at low tide. In one storm alone during the late 17th century, 70 ships were lost. Also known as Inchcape Rock, Bell Rock received its name after the Abbot from Arbroath tried to install a warning bell during the 14th century. Within a year, the bell was taken by a Dutch pirate. The only method if installing a permanent warning involved the construction of a lighthouse.

An Input is simply means a entrance or change made into a system and can eb used as modellign leading on to the process.

The process is a type of engineering that is used to complete a project as a WHOLE!

whereas an output is an exit froma system after conclusion and the finish completing the project and showing it.

The Lighthous of Alexandria, sometime called the Pharos lighthouse, which was built in the third Century BC on Pharos Island and was destroyed by an earthquake in the 1300's. Its lighting technique remains a mysterry.

Wood lighthouses were common before the 19th century because wood was readily available. It was phased out as a primary material due to the susceptibility to fire. Masonry towers were made from rubble stone, cut stone, brick and concrete. Sometimes lighthouses are made with Rubble stone, cut stone, brick, and concrete.

yes litehouse are still in use noday do help guid boaters around

Not all lighthouses are red and white but all lighthouses need to be visible during the daytime, as well as at night. The colours or stripes on some lighthouses increase their visibility. Some lighthouses are black, because the angle from which they are usually seen by ships places them against the white clouds or bright blue sky, and the traditional white or striped lighthouse makes them hard to see against this background.

name some of the most lighthouses in the world

There is 81 ligthouses in Ireland

Because the image and the idea of a lighthouse for a person associates with pure direct connection with nature - sea (ocean) as it is thrilling to see and feel the natural view from the top storey of a lighthouse. It's unique and attractive because it is usually situated on the "dramatic" edge between land and water. It symbolises and incarnates the eternal sight to the sea and the world from up above. It also associates with supernal loneliness of a lighthouse keeper and the lighthouse itself, standing high above the natural relief of earth. It is also appendant to idyllic calmness, harmony, contemplation, melancholy and even nostalgia, as the lighthouse can be realized as a harbinger of the sea on land. People also find the light of a lighthouse showing the way to the ships deeply romantic, and even existential. To sum up, it all about the emersion above down-to-earth life.

It is believed that, not only was the lighthouse at Alexandria the tallest lighthouse in the world for its time, but no lighthouse constructed since then has equalled it in height.

It employed remarkable technology for the time, and stood for many centruies before being destroyed by a series of earthquakes.