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Bomb Ketches.

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Bomb Ketches.

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Development.

The first recorded deployment of bomb vessels by the English was for the Siege of Calais in 1347 when Edward III deployed single deck ships with bombardes and other artillery. The first specialised bomb vessels were built towards the end of the 17th century, based on the designs of Bernard Renau d'Eliçagaray, and used by the French Navy. They were first called galiote à bombe (a word derived from the Dutch galliot, denoting a short, beamy vessel well suited for the powerful downward recoil of its weapons). Five such vessels were used to shell Algiers in 1682 destroying the land forts, and killing some 700 defenders[.Two years later the French repeated their success at Genoa. The early French bomb vessels had two forward-pointing mortars fixed side-by-side on the foredeck.


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To aim these weapons, the entire ship was rotated by letting out or pulling in a spring anchor. The range was usually controlled by adjusting the gunpowder charge. The French later adopted the word bombarde for this vessel, but it should not to be confused with the horizontal fire, stone throwing bombard of earlier centuries.
The French design was copied by the Royal Navy, who continued to refine the class over the next century or more, after Huguenot exiles brought designs over to England and the United Provinces. The side-by-side, forward-pointing mortars were replaced in the British designs by mortars mounted on the centerline on revolving platforms.


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These platforms were supported by strong internal wooden framework to transmit the forces of firing the weapons to the hull. The interstices of the framework were used as storage areas for ammunition.

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Granado bomb vessel, launched in 1742. It has two mortars inline. National Maritime Museum, London.
Early bomb vessels were rigged as ketches with two masts. They were awkward vessels to handle, in part because bomb ketches typically had the masts stepped farther aft than would have been normal in other vessels of similar rig, in order to accommodate the mortars forward and provide a clear area for their forwards fire. As a result, by the 1800s British bomb vessels were designed as full rigged ships with three masts, and two mortars, one between each neighboring pair of masts. Bomb vessels often had the front rigging made of chain, to better withstand the muzzle blast of the mortars. Mortars were the only kind of naval armament to fire explosive shells rather than solid shot until the invention of the Paixhans gun. Since it was considered dangerous to have large stocks of shells on board the ships that were firing them, and because the reinforced mortar platforms occupied so much space below decks, bomb vessels were usually accompanied by a tender to carry ammunition as well as the ordnance officers in charge of firing the mortars. However, as naval warfare became more advanced, bomb ships were also accompanied by frigates to protect them from direct assault by faster, smaller vessels.


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Bomb vessels were traditionally named after volcanoes, or given other names suggestive of explosive qualities. Some were also given names associated with the underworld. Vessels of other types which were later converted to bomb ships generally retained their original names.
Bomb vessels were highly specialized and expensive to fit out and maintain, and only marginally suited for their secondary role as cruisers. Because bomb vessels were built with extremely strong hulls to withstand the recoil of the mortars, several were converted in peacetime as ships for exploration of the Arctic and Antarctic regions, where pack ice and icebergs were a constant menace. Most famously, these ships included HMS Erebus and HMS Terror. In this case, the volcanoes – Mount Erebus and Mount Terror on Ross Island in Antarctica – were named after the ships, instead of vice versa.


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Notable bomb vessels and actions.



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In this view of the Battle of Copenhagen (1801), bomb vessels in the left foreground fire over the British and Danish lines of battle into the city in the background
The bomb vessels Racehorse and Carcass were further strengthened for an expedition of discovery to the North Pole in the 1770s. The uncompleted expedition included a young Horatio Nelson. [1]
Bomb vessels Discovery, Explosion, Hecla, Sulphur, Terror, Volcano, and Zebra participated in the 1st Battle of Copenhagen in 1801.
Thunder, Vesuvius, Aetna, and Zebra participated in the 2nd Battle of Copenhagen in 1807.
Thunder and Aetna additionally participated in the Battle of the Basque Roads in 1808 (this action was also notable for including three rocket vessels in support of the bombs).
The "bombs bursting in air" recorded by Francis Scott Key at the Battle of Baltimore in 1814 were provided by the Volcano, Meteor, Devastation, Aetna, and a new Terror.
Bomb vessels were part of the British forces that attacked Fort St. Philip in January 1815, during the War of 1812. This engagement is known as the Siege of Fort St. Philip.

In fiction.


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The Commodore (published 1945), a Horatio Hornblower novel written by C. S. Forester, features several actions by British bomb vessels. The text includes a highly detailed account of the procedures used to load the mortars and aim, which involved anchoring fore-and-aft, receiving range corrections from another vessel, precisely adjusting the aim using an anchor cable attached to a windlass, and by using fine adjustments in the amount of gun powder to correct the range. A later book, Hornblower in the West Indies, features a small portable "ship's mortar" mounted in a boat, used to bombard a target during a riverine operation.
In his stirring fictionalized account, war correspondent, author, and yachtsman G. A. Henty describes in vivid detail the deployment of ten bomb-ketches by the Spanish besiegers during the final period of the siege of Gibraltar.
On September 13, 1781, a tremendous fire was suddenly opened with redhot shot and carcasses upon the enemy’s ten battering-ships that were lined up in the Bay of Gibraltar. By mid-afternoon most of the battering-ships and the Spanish admiral’s flagship were showing signs of being on fire.
By the early hours of September 14, eight of the battering-ships were in conflagration. Shortly after 5am two of the battering-ships exploded. Of the six battering-ships still in flames, three blew up before eleven o'clock. The other three burned to the waterline as the magazines had been flooded by the Spaniards before they abandoned the ships. The British hoped that the two remaining battering-ships might be saved to be sent home as trophies of the victory, but about noon one of them suddenly burst into flames and then blew up. The other was examined and found to be so damaged that she could not be saved. She was accordingly set on fire too and destroyed. Thus the whole of the ten battering-ships that were considered by their Spanish builders to be invincible were destroyed.
Over the next five months nothing of any importance took place till, on the 2nd of February, 1782, the Spanish commander sent a communication to advice that the preliminaries of a general peace had been signed by Great Britain, France, and Spain, and three days later the blockade at sea was discontinued, and the port of Gibraltar again open.

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In The Ramage Touch by Dudley Pope (published 1979), Captain Lord Ramage and the crew of the Calypso frigate capture two bomb ketches, which they subsequently use to thwart a French invasion plan in the Mediterranean. Like the Hornblower books, The Ramage Touch describes in great detail the technical aspects of employing a bomb vessel during the Napoleonic era.

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In H.M.S. Cockerell by Dewey Lambdin (published 1995), First Lieutenant Alan Lewrie is set ashore by his vindictive captain, for 'land service' during the Siege of Toulon. There Admiral Goodall gives him a bomb ketch, which he commands for several weeks until it is blown out of the water and sunk by a young Colonel of artillery named Buonaparte.

Plenty of scope for an action with a Bomb.

Rob.

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Comments

  1. Killick's Avatar
    All books sound good. I will have to get my hands on the Hornblower set as I have never read them.