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Hawk was the second of three small, fast vessels designed by
Surveyor of the Navy Jacob Acworth to guard merchant shipping in British home waters after the declaration of war against Spain in 1739. She was ordered in August 1740, to be constructed by contract by shipwrights Grevill and Whetstone on the waterfront at Limehouse on the River Thames, and was then fitted out, armed and commissioned at Deptford Dockyard. Her dimensions were in keeping with other vessels of her class, with an overall length of , a beam of and measuring 205 tons burthen. Construction costs were low, being £1,550 in shipwright fees and building expenses and a further £1,505 for fittings.
Hawk had two masts, supported by a
trysail mast aft of the main mast, being
square-rigged on the fore and main masts. She was built with seven pairs of gunports along her upper deck, but initially armed with only eight four-pounder cannons with the remaining ports left unused. Twelve lightweight half-pounder swivel guns (anti-personnel weapons) were mounted on posts along the sides of the deck, and two more four-pounder cannons were added in 1744. The vessel was established with a complement of 80 men. ==Naval career==