The cluster concept has attracted attention from scholars and become increasingly popular in regional politics, as exemplified by The Norwegian Centres of Expertise programme. External linkages of cluster firms have become a concern inspired by the notions 'local buzz' and 'global pipelines'. Viable clusters are dependent on the quality of both internal industrial environment and external linkages. The article focuses on internationalization of SMEs from a cluster perspective and discusses how cluster firms take advantage of different dimensions of proximity in their internationalization endeavours. By applying the industrial network approach, firms' strategies and positions at different stages of internationalization are integrated in the analysis. The cases are four SMEs located in a 'subsea cluster' close to Bergen, Norway. Data were collected through interviews with top managers and observations during cluster-related meetings. The cases differ with regard to size and international experiences. Firms that are highly internationalized rely on cognitive or organizational proximity when they internationalize further. Such firms provide opportunities for other cluster firms. In contrast, less internationalized firms rely on social and institutional types of proximity. As they collaborate with larger and more experienced cluster firms they can skip some of the resource-demanding steps in the internationalizing process.