About: Air lock diving-bell plant

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Gibraltar Harbour's air lock diving-bell plant, or caisson diving bell barge, was a purpose-built barge for the laying, examination and repair of moorings for battleships. It was designed by Siebe Gorman & Company of Lambeth and Forrestt & Co. Ltd of Wivenhoe in Essex, who built and supplied it in 1902 for the British Admiralty. In 1969 the Gibraltar Chronicle reported the plant as still working in the harbour; it was believed to be the only vessel of its type in the world.

Attributes	Values
rdf:type	Thing
rdfs:label	Air lock diving-bell plant (en)
rdfs:comment	Gibraltar Harbour's air lock diving-bell plant, or caisson diving bell barge, was a purpose-built barge for the laying, examination and repair of moorings for battleships. It was designed by Siebe Gorman & Company of Lambeth and Forrestt & Co. Ltd of Wivenhoe in Essex, who built and supplied it in 1902 for the British Admiralty. In 1969 the Gibraltar Chronicle reported the plant as still working in the harbour; it was believed to be the only vessel of its type in the world. (en)
foaf:depiction
dcterms:subject	1906 ships Victorian-era naval ships of the United Kingdom Steamships of the United Kingdom
Wikipage page ID	60627496 (xsd:integer)
Wikipage revision ID	1067931393 (xsd:integer)
Link from a Wikipage to another Wikipage	Rosyth Royal National Lifeboat Institution Moon pool Barge Boilermaker Renfrew River Clyde River Colne, Essex Anchor Gibdock Moulded depth Crown Agents Boiler Caisson (engineering) Siebe Gorman Funnel (ship) British Admiralty Tug War Office Heavy equipment Lofting Airlock 1906 ships Victorian-era naval ships of the United Kingdom Naval rating Steamships of the United Kingdom Lambeth Jackhammer Sea trial Winch Diving chamber Buoy Port of Gibraltar Reach plc Shilling Wivenhoe Robert Davis (inventor) Scapa Flow Gibraltar Chronicle Mr. Louie Mediterranean Diving-bell Moonpool
Link from a Wikipage to an external page	https://www.jstor.org/stable/41360195%3Fread-now=1&refreqid=excelsior%3A1711aa7834d367dd485fa40b32c6402a&seq=14%23page_scan_tab_contents
sameAs	Air lock diving-bell plant Air lock diving-bell plant
dbp:wikiPageUsesTemplate	dbt:Authority_control dbt:Clarify dbt:Clear dbt:Convert dbt:HMS dbt:Reflist dbt:Short_description
thumbnail	wiki-commons:Special:FilePath/The_Times_history_of_the_war_(1914)_(14577627960).jpg?width=300
colwidth	30 (xsd:integer)
date	May 2019 (en)
reason	this would require very complex seals, does not seem practicable (en)
has abstract	Gibraltar Harbour's air lock diving-bell plant, or caisson diving bell barge, was a purpose-built barge for the laying, examination and repair of moorings for battleships. It was designed by Siebe Gorman & Company of Lambeth and Forrestt & Co. Ltd of Wivenhoe in Essex, who built and supplied it in 1902 for the British Admiralty. Local conditions at Gibraltar dictated the need for such a craft. The heavy harbour moorings have three chains extending out radially along the seabed from a central ring, each terminating in a large anchor. Most harbours have a soft seabed, and it is usual to lay down moorings by settling anchors in the mud, clay or sand, but this could not be done in Gibraltar harbour where the seabed is hard rock. For Gibraltar the seabed needed to be dug out sufficiently for an anchor point to hold. The barge would be towed over the work site, moored in place with anchors, and the bell would be lowered to the seabed. Air pumped into the bell would displace the water, and workers accessed the bell through the airlock in the central access shaft. This system allowed continuous work with changes of workmen in four-hour shifts, and allowed men to work on the seabed in normal work clothing. In 1969 the Gibraltar Chronicle reported the plant as still working in the harbour; it was believed to be the only vessel of its type in the world. (en)
prov:wasDerivedFrom	wikipedia-en:Air_lock_diving-bell_plant?oldid=1067931393&ns=0
page length (characters) of wiki page	19837 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Air_lock_diving-bell_plant
is Link from a Wikipage to another Wikipage of	Gibdock Siebe Gorman Diving bell Air Lock Diving-Bell Plant Mr. Louie Diving-bell barge
is Wikipage redirect of	Air Lock Diving-Bell Plant Diving-bell barge
is foaf:primaryTopic of	wikipedia-en:Air_lock_diving-bell_plant

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