Coastal defence and fortification

Coastal defence (or defense) and coastal fortification are measures taken to provide protection against military attack at or near a coastline (or other shoreline), for example, fortifications and coastal artillery. Because an invading enemy normally requires a port or harbour to sustain operations, such defences are usually concentrated around such facilities, or places where such facilities could be constructed. Coastal artillery fortifications generally followed the development of land fortifications, usually incorporating land defences; sometimes separate land defence forts were built to protect coastal forts. Through the middle 19th century, coastal forts could be bastion forts, star forts, polygonal forts, or sea forts, the first three types often with detached gun batteries called "water batteries". Coastal defence weapons throughout history were heavy naval guns or weapons based on them, often supplemented by lighter weapons. In the late 19th century separate batteries of coastal artillery replaced forts in some countries; in some areas these became widely separated geographically through the mid-20th century as weapon ranges increased. The amount of landward defence provided began to vary by country from the late 19th century; by 1900 new US forts almost totally neglected these defences. Booms were also usually part of a protected harbor's defences. In the middle 19th century underwater minefields and later controlled mines were often used, or stored in peacetime to be available in wartime. With the rise of the submarine threat at the beginning of the 20th century, anti-submarine nets were used extensively, usually added to boom defences, with major warships often being equipped with them (to allow rapid deployment once the ship was anchored or moored) through early World War I. In World War I railway artillery emerged and soon became part of coastal artillery in some countries; with railway artillery in coast defence some type of revolving mount had to be provided to allow tracking of fast-moving targets.

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Related concepts (16)

De Redin towers

The De Redin Towers (Torrijiet ta' De Redin) are a series of small coastal watchtowers built in Malta by the Order of Saint John between 1658 and 1659. Thirteen towers were built around the coast of mainland Malta, eight of which still survive. The Mġarr ix-Xini Tower, which was built on Gozo in 1661 after the death of de Redin, has a design similar to the De Redin towers. The Spanish knight Martin de Redin was elected Grand Master of the Order of St. John on 17 August 1657.

Lascaris towers

The Lascaris Towers (Torrijiet ta' Lascaris) are a series of mostly small coastal watchtowers built in Malta by the Order of Saint John between 1637 and 1652. The first seven towers were built around the coast of mainland Malta between 1637 and 1638. Between 1647 and 1652, a large tower was also built on mainland Malta, and two smaller ones were built on Gozo. The Italian knight Giovanni Paolo Lascaris was elected Grand Master of the Order of St. John on 16 June 1636.

Wignacourt towers

The Wignacourt towers (Torrijiet ta' Wignacourt) are a series of large coastal watchtowers built in Malta by the Order of Saint John between 1610 and 1620. A total of six towers of this type were constructed, four of which survive. In 1418, the Maltese people made a petition to build a tower guarding the Gozo Channel, but nothing materialised. In the early 15th century, the local Mahras maintained several watch posts around the islands' coastline, and some of the posts possibly had a coastal watchtower.