Surplus Property occurs when some assets are retained by an entity, but they are not currently being fully utilized because they are obsolete, out of date or simply they are no longer providing the service they were built or procured for. Thus, these assets remain fully or partially idle. This is a typical effect affecting some public entities being Port Authorities one of them and Aids to Navigation one of their most affected properties. However, lighthouses are located in unique geographical locations, being widely visited spaces and with a high potential of attractiveness for new complementary uses. A stepped methodology to effectively manage public assets is presented with the goal of selecting those assets to be included in a Surplus Property Plan and to find the best suitable uses to be implemented in them. A real case on Ferrol – San Cibrao Port Authority located in the Northwest of Spain is presented in order to illustrate the practical application of such methodology in a set of lighthouses and other Aids to Navigation owned and managed by this Entity. Lighthouses and other aids to navigation can contribute to public coastal conservation goals if a structured plan is put in place. Otherwise, the contrary effect occurs and deterioration of these assets due to lack of use may prejudice severely the coast and public image of their owners, frequently Port Authorities. The methodology successfully used in Ferrol – San Cibrao Port Authority (Spain) can be easily extrapolated to other environments contributing to meet the Sustainable Development Goals included in the Agenda 2030 and other international commitments related to the conservation of cultural heritage as the Faro Convention of the Council of Europe.

当某个实体保留了某些资产，但由于它们已过时，已过时或只是不再提供其建造或购置的服务而导致当前未被充分利用时，就会发生剩余财产。因此，这些资产完全或部分保持闲置状态。这是影响某些公共实体的典型效果，其中一些公共实体是港口当局之一，而其导航援助是其受影响最大的财产之一。然而，灯塔位于独特的地理位置，是被广泛访问的空间，并且对于新的互补用途具有很高的吸引力。提出了一种有效管理公共资产的分步方法，其目的是选择要包含在“剩余财产计划”中的资产，并找到要在其中实施的最合适的用途。为了说明这种方法的实际案例，该方法位于西班牙西北部的San Cibrao港口管理局，以说明这种方法在该实体拥有和管理的一系列灯塔和其他航标中的实际应用。如果制定了结构化的计划，灯塔和其他航行辅助工具可有助于实现公共沿海保护目标。否则，就会产生相反的效果，并且由于缺乏使用而导致这些资产的退化可能严重损害其所有者（经常是港口当局）的海岸和公众形象。