Black Deep

The Black Deep is a channel which forms the most important of the three main permanent shipping routes past the shoals in the North Sea and outer Thames Estuary, the others being the Barrow Deep and Princes Channel.

The Black Deep begins in open sea east of Foulness Point and south of Clacton-on-Sea and is bounded by two substantial sandbanks, the Sunk Sands to the north-west and the Long Sands spread out to the south and east (which have some wind turbines).

Deep-draught vessels making for the Port of London use it to approach (from the north-east from the position of the Sunk lightship thence into the Knock John channel to enter the Thames Estuary. Bulk carriers also tend to use the channel when entering or exiting the Medway estuary to the south that has a minimum depth of 14 metres as far as Kingsnorth.

Nautical markers

Deep-draught vessels making for the Port of London from the North Sea use it to approach (from the north-east from the position of the Sunk lightship thence into the Knock John channel to enter the Thames.[1]

Passing south off the West Knock lightship off Shoeburyness large bulk carriers also tend to use the channel when entering or exiting the Medway estuary that has a minimum depth of 14 metres as far as Kingsnorth. [2]

History

The Thames Estuary was historically a difficult area to navigate due to its many sandbanks. One of the earliest references to maritime pilotage dates from 1387 and refers to a pilot "of the Black Deeps" in the estuary.[3] Richard Caundish, the sixteenth-century maker of the oldest known English maritime chart, who had charted the Thames shoals, was assisted by a pilot who had found a new, safer route through the Black Deep.[4]

As a strategically important area, access to the Deep has been restricted in wartime, while during the Second World War naval forts were constructed at Sunk Head and Knock John to deter German minelaying activity. Until 1967 sewage sludge from the City of London was dumped in the Black Deep at a point around 60 miles (97 km) below London Bridge; after this time the Barrow Deep was used.[5]

A rumour current in the sixteenth century, repeated by the chroniclers John Rastell and Edward Hall, by a continuer of John Hardyng's chronicle and subsequently by John Speed, suggested that Richard III, aided by the priest of Sir Robert Brackenbury, had disposed of the bodies of the murdered Edward V of England and Richard of Shrewsbury, 1st Duke of York in the Black Deep, "whereby they should never rise up, or be any more seen".[6]

Through much of the 1980s, Knock John Deep was the anchorage spot for Radio Carolines Ross Revenge ship

The London Array wind farm is sited immediately to the east of the Deep.[7]

Coordinates: 51°45.8′N 1°31.7′E / 51.7633°N 1.5283°E / 51.7633; 1.5283

See also

References

  1. ↑ Port of London Authority Area Procedures, accessed 26-08-08.
  2. ↑ Black Deep, United Kingdom Hydrographic Office, accessed 26-08-08.
  3. ↑ History of Pilotage Part 1, The Pilot (Official Journal of the United Kingdom Maritime Pilots' Association), accessed 27-08-08
  4. ↑ Taylor, E. G. The Haven-Finding Art, Bodley Head, 1971 pp.192-193, ISBN 978-0-370-01347-3
  5. ↑ Bazalgette and London's Sewage, portcities.org, accessed 26-08-08.
  6. ↑ Speed, in Weever, J., Antient Funeral Monuments, of Great-Britain, Ireland, and the Islands Adjacent, William Tooke (editor), 1767, p.291
  7. ↑ London Array: Location, accessed 26-08-08.
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