Ships and offshore units are specialist structures with high requirements for efficiency and availability throughout their entire life cycle. Many of the processes, from draft via production all the way to operation, can be supported by 3D models and computer graphics. How can the actual dimensions of a compartment be measured efficiently in case of retrofit e.g. for ballast water treatment or ILO MLC? How can the location of a structural crack be reported to onshore colleagues? How can the design of a vessel be communicated for review by owner or class?