New Betsy was commissioned under the command of Mr. T. Whaley in September 1796. In June 1798 Mr. John Matthew Miller took command.
On 10 July Miller and Mr. Edward Dawson, master of, dined together on New Betsey, together with their families and other non-commissioned officers, while both barges were at Sheerness. The meal included the imbibing of much wine, and a disagreement developed between Miller and Dawson. Dawson left New Betsey and landed on the beach. When Miller stepped out of a boat to help the ladies disembark, Dawson came up and using his hanger, stabbed Miller, killing him. Dawson's trial took place 25 July at Maidstone, where the jury quickly found him guilty of murder. Dawson was hanged on 27 July on Penenden Heath.[1]
The "Principal Officers and Commissioners of His Majesty's Navy" offered New Betsey, of 80 tons (bm), for sale on 24 October 1798. She sold then.