Four ships of the Royal Navy have been named HMS Louisa:
was a 3-gun gunvessel, previously a hoy, purchased in 1794 and sold in 1798. HMS Louisa was also a 3-gun vessel, separate from the above, purchased in 1798 and sold in 1799.Winfield (2008), p.326. was a tender in service in 1814 and sold in 1816. was a cutter purchased in 1834. She foundered in 1841. was an wooden screw gunboat launched in 1855 and sold in 1867.
See also HM HM
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