The mobility of nomadic Indigenous people has been systematically constrained over time by states seeking control over peripheral spaces and people. This is evident in the case of the Kawésqar nomadic ‘people of the sea’ who have been subject to a century of attempts by the Chilean state to spatially fix their movements over both their terrestrial territories and marine ‘maritories’. In this paper, we show how Indigenous groups like the Kawésqar can challenge and even regain partial control over their maritory by using spatial instruments of the state. We argue that by using these instruments to remobilise, the Kawésqar have been empowered to demobilise other groups and marine related sectors, such as aquaculture. These findings can reorient public policy to be more sensitive to Indigenous space and mobility. Instead of focusing exclusively on the establishment of spatial boundaries to exclude Indigenous communities, they can be used as a means of empowering these communities to exert control over actors and sectors seeking to limit their mobility.