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History
Boom (navigational barrier)
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A boom or a chain is an obstacle strung across a navigable stretch of water to control or block navigation.
A boom blocking the River Foyle during the siege of Derry
A boom blocking the River Foyle during the siege of Derry
Crusaders break a chain protecting the harbour (at left) in the siege of Damietta.
Crusaders break a chain protecting the harbour (at left) in the siege of Damietta.
Boom towers in Norwich
Boom towers in Norwich
Remains of the great chain that protected the Golden Horn
Remains of the great chain that protected the Golden Horn
Raid on the Medway
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The Raid on the Medway, during the Second Anglo-Dutch War in June 1667, was a successful attack conducted by the Dutch navy on English warships laid up in the fleet anchorages off Chatham Dockyard and Gillingham in the county of Kent. At the time, the fortress of Upnor Castle and a barrier chain called the "Gillingham Line" were supposed to protect the English ships.
Attack on the Medway, June 1667, by Willem van der Stoop
Attack on the Medway, June 1667, by Willem van der Stoop
The burning of the English fleet off Chatham, 20 June 1667, likely painted by Willem van de Velde the Younger
The burning of the English fleet off Chatham, 20 June 1667, likely painted by Willem van de Velde the Younger
A picture by Willem Schellincks of the raid. The view is from the south. On the left Upnor Castle is silhouetted against the flames; on the opposite s
A picture by Willem Schellincks of the raid. The view is from the south. On the left Upnor Castle is silhouetted against the flames; on the opposite side of the river more to the front the burning dockyard of Chatham. To the north the conflagration near the chain is shown and on the horizon the ruins of Sheerness Fort are still smoking.
"Burning English ships" by Jan van Leyden. Shown are the events near Gillingham: in the middle Royal Charles is taken; on the right Pro Patria and Sch
"Burning English ships" by Jan van Leyden. Shown are the events near Gillingham: in the middle Royal Charles is taken; on the right Pro Patria and Schiedam set Matthias and Charles V alight