Historically Famous Lighthouses (Illustrated)

Historically Famous Lighthouses (Illustrated)

by Anonymous

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Overview

The lighthouse typifies maritime safety. As part of our early coastal defense system, they played a major role in important Coast Guard duties related to military readiness. Additionally, the light’s strategic locations along our coasts aided another early Coast Guard function, law enforcement, by making it possible for cutters to judge their distances from the coast and so prevent smuggling operations within the three-mile limit.

The stories of 56 lighthouses have been told here. The stories of hundreds of others, of equal interest, could have been included had space permitted.

The oldest lighthouse described is the Boston Light built in 1716. The newest in this booklet is Buzzards Bay Light which is located some five miles off the Massachusetts coast, replacing a lightship that had been there for many years.

The distance these lights are visible has been given in the geographical range. The theoretical visibility of a light in clear weather depends upon two factors, the height of the light above water, and its intensity. The height controls what is known as the geographic range, while the intensity controls what is known as the luminous range. As a rule, for the principal lights the luminous range is greater than the geographic, and the distance from which such lights are visible is limited by the earth’s curvature only. Under some atmospheric conditions the glare or loom of these lights, and occasionally the light itself, may be visible far beyond the computed geographic range. On the other hand, and unfortunately more frequently, these distances may be lessened by fog, rain, snow, haze, or smoke.


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Product Details

BN ID: 2940151435932
Publisher: Bronson Tweed Publishing
Publication date: 04/02/2015
Sold by: Barnes & Noble
Format: NOOK Book
File size: 4 MB

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