Turbine erections are commonly done by self-propelled installation vessels and/or Jack-Up Barges. According to the year they were built, and the purpose they were designed for, the vessels have different capabilities. Offshore turbine installations require lifting the heavy turbine pieces and placing them at certain heights. Even a small move of the vessel can cause a few meters of error at the hook height. In order to safely install these heavy components, and to be able to place them on the exact place precisely, the installation vessels rise on their jack up legs to create a stable working platform at the construction site.
These installation vessels are specified in two groups
Wind turbine installation vessels (purpose built for wind industry)
Jack up barges (general offshore construction)