They included naval forces known as "River Fencibles", made up of boatmen on the Thames and other southern English towns and cities, as well as Sea Fencibles, who, among their other duties, manned small commercial vessels converted to coastal defense.
In 1798 watermen and other groups of river tradesmen on the River Thames voluntarily formed associations of River Fencibles.
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Instead in May 1805 he was given command of a unit of the Sea Fencibles, with responsibilities for the coast between St Alban's Head and Puncknowle.