The Kentish Knock is a long

shoal In oceanography, geomorphology, and Earth science, geoscience, a shoal is a natural submerged ridge, bank (geography), bank, or bar that consists of, or is covered by, sand or other unconsolidated material, and rises from the bed of a body ...

(bank, shallows) in the

North Sea The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium, and France. A sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Se ...

east of

Essex Essex ( ) is a Ceremonial counties of England, ceremonial county in the East of England, and one of the home counties. It is bordered by Cambridgeshire and Suffolk to the north, the North Sea to the east, Kent across the Thames Estuary to the ...

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

. It is the most easterly of those of the

Thames Estuary The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain. Limits An estuary can be defined according to different criteria (e.g. tidal, geographical, navigational or in terms of salinit ...

and its core, which is shallower than , extends . Thus it is a major hazard to deep-draught navigation. It is exactly due east of Foulness Point, Essex and is centred about NNE of

North Foreland North Foreland is a chalk headland on the Kent coast of southeast England, specifically in Broadstairs. With the rest of Broadstairs and part of Ramsgate it is the eastern side of Kent's largest peninsula, the Isle of Thanet. It presents a b ...

Kent Kent is a Ceremonial counties of England, ceremonial county in South East England. It is bordered by Essex across the Thames Estuary to the north, the Strait of Dover to the south-east, East Sussex to the south-west, Surrey to the west, and Gr ...

both are extreme points of those counties.

Shape

It is about equidistant between, on the one hand, the south-west North Sea tidal

amphidromic point An amphidromic point, also called a tidal node, is a geographical location where there is little or no difference in sea height between high tide and low tide; it has zero tidal amplitude for one harmonic constituent of the tide. The tidal ra ...

(place of negligible tides); and splayed on the other the narrowest point and endpoint of the

English Channel The English Channel, also known as the Channel, is an arm of the Atlantic Ocean that separates Southern England from northern France. It links to the southern part of the North Sea by the Strait of Dover at its northeastern end. It is the busi ...

(the

Strait of Dover The Strait of Dover or Dover Strait, historically known as the Dover Narrows, is the strait at the narrowest part of the English Channel, marking the boundary between the Channel and the North Sea, and separating Great Britain from continental ...

) (southeast) and heart of the

Tideway The Tideway is the part of the River Thames in England which is subject to tides. This stretch of water is downstream from Teddington Lock. The Tideway comprises the upper Thames Estuary including the Pool of London. Tidal activity Depending ...

(southwest) which have by contrast high tidal range. It is thus among a succession of banks which are aligned NNE to SSW but turn towards the estuary narrowing further west. In line with the erosion and deposition from each such regular tide, its northits steepest, narrowest part veers slightly more towards north-south alignment than its south.

Ecology

Made of sand and gravel, it hosts

hermit crabs Hermit crabs are anomuran Decapoda, decapod crustaceans of the superfamily (taxonomy), superfamily Paguroidea that have adapted to occupy empty scavenged mollusc shells to protect their fragile exoskeletons. There are over 800 species of hermit c ...

sand goby The sand goby (''Pomatoschistus minutus''), also known as a polewig or pollybait, is a species of ray-finned fish native to marine and brackish European waters from the Baltic Sea through the Mediterranean Sea and into the Black Sea where it occ ...

ray Ray or RAY may refer to: Fish * Ray (fish), any cartilaginous fish of the superorder Batoidea * Ray (fish fin anatomy), the bony or horny spine on ray-finned fish Science and mathematics * Half-line (geometry) or ray, half of a line split at an ...

s and

catshark Catshark may refer to: * Scyliorhinidae, a family of ground sharks, many species of which are commonly referred to as "catshark". * Pentanchidae, a family of ground sharks with the overall name deepwater catsharks, but many species are referred ...

s. In rare species it has visiting

red-throated diver The red-throated loon (North America) or red-throated diver (Britain and Ireland) (''Gavia stellata'') is a migratory aquatic bird found in the northern hemisphere. The most widely distributed member of the loon or diver family, it breeds prim ...

s. Channels are believed to have been caused by glacial floodwaters many millennia ago. Since 2012,

The Wildlife Trusts The Wildlife Trusts, the trading name of the Royal Society of Wildlife Trusts, is an organisation made up of 46 local Wildlife Trusts in the United Kingdom, the Isle of Man and Alderney. The Wildlife Trusts, between them, look after more than 2, ...

have been campaigning for recognition of a 37 sq. mi. (96 km²) section of the Knock, known as Kentish Knock East, as a

Marine Conservation Zone A Marine Conservation Zone (MCZ) is a type of marine nature reserve in United Kingdom, UK waters. They were established under the Marine and Coastal Access Act 2009, Marine and Coastal Access Act (2009) and are areas designated with the aim to prot ...

Scope and soundings

To explain the numbers on the inset map a depth of 1₁ is a formula of six feet (i.e. one

fathom A fathom is a unit of length in the imperial and the U.S. customary systems equal to , used especially for measuring the depth of water. The fathom is neither an international standard (SI) unit, nor an internationally accepted non-SI unit. H ...

) and 1 foot. It is fathoms. Some of Kentish Knock is, or was, at chart datum "0₁". At just one foot in depth it will have become exposed at the ebb phase of most extreme, spring tides.

Maritime history

References

{{coord, 51, 40, N, 01, 37, E, type:landmark_source:dewiki, display=title Landforms of England Sandbanks of the North Sea Shoals of the United Kingdom Thames Estuary Aviation accidents and incidents locations in England Navigational hazards

Shape

Ecology

Scope and soundings

Maritime history

See also

References