The earliest recorded use of the term was in 1793, when Royal Navy captain Sir Home Popham organised groups of fishermen to guard against French vessels off the coast of Nieuwpoort, Belgium.
At Popham's suggestion the British Admiralty subsequently authorised the formation of co-ordinated Sea Fencible units along the English and Irish coasts.
Popham's Sea Fencible companies consisted of merchant seamen using their own private or commercial vessels, but operating under letters of marque that authorised them to capture enemy ships should opportunity arise.
Royal Navy captain Sir Home Popham developed the Sea Fencibles concept while serving as Britain's Agent for Transport in Flanders during the French Revolutionary Wars.
[2] In support of the Nieuwpoort garrison, Popham armed and equipped the town's fishing fleet and led it in action against French vessels along the coast.
Both the Army's Commander-in-Chief the Duke of York and field commander General Sir Charles Grey subsequently acknowledged that Popham's actions in "arming the fishermen of Flanders in defence of their own towns" had played a significant role in preserving British control of Nieuwpoort.
When a French invasion of Britain appeared imminent in 1798, Popham recommended that Admiralty create a similar body to defend the coast between Cornwall and the Firth of Forth.
For example, on 13 June 1805 the sixth-rate frigate Vestal and the Sea Fencibles recaptured the Industry, off Hastings, and shared the subsequent salvage money.
[11] Sea Fencible volunteers were trained in the use of arms and were required to man watch and signal towers, and fixed and floating batteries along the coasts and ports.
The Admiralty commissioned a small number of armed vessels for use in districts where there were insufficient private craft to meet a Sea Fencible company's needs.
[12] The Sea Fencibles operated in accordance with letters of marque authorising the capture of French or Spanish merchant shipping and a share of the proceeds should the seized vessel then be sold.
The owners were under orders to co-operate with the Royal Navy, and they were entitled to payment of compensation, according to the size of their ships and the amount of time they were required.
In September 1803, it was reported that all the seafaring men of the city of Gloucester were to enlist in the Sea Fencibles in order to obtain protection from the impress (press gang).
Captain E.H. Columbine of the Sea Fencibles put a number of his men on the cutter Lion, offered by a Mr. Wexham, and set out after the French vessel.
The Brixham Sea Fencibles seeing this take place, took a boat, and armed only with muskets and pikes, succeeded in recapturing the Susannah and her prize crew.
HM hired armed cutter Princess Augusta, under the command of Lieutenant John Tracey, encountered a 14-gun French privateer off Huntcliff.
[23] In January 1810, Sea Fencibles from Happisburgh and Winterton used newly issued Manby mortars to effect successful rescues of those on board two vessels driven ashore in a gale.
Members of the Corps escorted the barge carrying the body of Lord Nelson along the Thames in small boats during his state funeral in 1806.
The Lord Mayor received an official letter on the subject, which he sent to Commodore Lucas.— On Sunday the corps were assembled in the Corn-market, for the purpose of delivering up their arms.
The members thereof not having had any previous intimation from the Government with respect to its intentions, were much surprised as well as dissatisfied.— A warm press afterwards took place on the River, and several of them were picked up.
[31] The consequence of losing their protected status as Fencibles meant these men were liable to be pressed for the navy, unsurprisingly most did their utmost to prevent being seized.
[33] By Admiralty Order, 20 Sea Fencible units were established and a network of Martello towers constructed to protect the Irish coastline.
[34] The number of men and boats per district varied widely and the British had concerns about their reliability, especially given Robert Emmet's insurrection in Dublin in 1803.
[34] There were Sea Fencible units attached to the battalions of St. John, Charlotte and Northumberland counties in New Brunswick during the War of 1812 to protect port facilities in the colony.