Since the end of the 2010s, the project to create independent access to space within German territory has gained momentum. A dedicated spaceport - a launch and landing site for satellite launchers - enables a nation to carry out experiments and missions in space, for example in the areas of communication and geolocalisation technologies, internet provision, big data and earth observation, without having to rely on foreign space infrastructure. Such space infrastructure is relatively rare (there are a total of 35 spaceports worldwide, two of which are on European soil, in Sweden and French Guiana), so it would give Germany (and Europe) a high degree of technological sovereignty, competitiveness and geopolitical independence. In terms of construction and operating conditions, the German context has special characteristics: As launch vehicle trajectories usually pass over uninhabited areas to protect civilian infrastructure and populations, a mobile offshore rocket launch site for small launch vehicles and small satellites is to be built in densely populated Germany. The German Offshore Spaceport Alliance is pushing ahead with the corresponding project in the designated area on the coast of Bremen/Bremerhaven. The alliance is collaborating with an intersectoral landscape of stakeholders, including the AviaSpace Bremen cluster, the Federation of German Industries, various German aerospace companies - Rocket Factory Augsburg, HyImpulse, ISAR Aerospace, Stratbyrd Consulting - and the German Aerospace Centre. The German government announced its support for the project in 2023 with a budget resolution and a volume of 2 million euros. The creation of a mobile rocket launch site on German territory holds socio-economic potential in terms of labour market development as well as securing and qualifying skilled workers. In addition, promising opportunities for research and exploration, technological development, geopolitical strategy and international co-operation can go hand in hand with the development of the launch site. Nevertheless, the environmental impact of the construction and operation of space infrastructure and corresponding measures such as nature conservation and emissions control must be taken into account. In addition, a German space law to regulate liability and safety issues is still pending.