 In 1989 she underwent a major upgrade involving the installation of Hydrochart II, which employed a Microvax computer system to acquire and process hydrographic data.Hydrochart II gave her the capability to generate bottom contour charts with a swath width of approximately two-and-a-half times the water depth, ranging from 10 
to 1000 meters (32.8 to 3,280 feet), in real time.