The Helmen's Sisters Boating Shop is located on Kingfish Pier in Bluff City during the 1800s. It is owned and operated by the Helmen sisters as a front to cover for their secret invention of mayonnaise. Neither sister knows much about boating, which leads many local residents to be suspicious of the Helmen sisters.
The sisters, played by Jack de Quidt and Janine Hawkins, are not named in the episode in which they appear.