The Hyball all electric ROV was introduced by Hydrovision Ltd of Aberdeen in the 1990’s and has been used for many years in a variety of roles including offshore inspection in the oil and gas industry, harbour, dam and ship maintenance, ROV pilot training and biological and environmental survey. An upgrade “offshore” version was introduced and in total around 200 systems have been manufactured. Although manufacturing stopped in 2003, a strong customer base remains committed to the Hyball ROV systems. Used at Wylfa for the inspection of the water storage reservoir around 15 years ago.