In recent decades, GPS has been regarded as a highly robust and reliable positioning system. However, this perception is now changing. In addition to the influence of solar storms, there is also an increasing impact of jamming and spoofing, which can severely disrupt the signal, with a direct effect on all connected navigation equipment and operations. Possible research areas include: What factors can affect the GPS signal? How can interference be detected and anticipated? What alternatives exist for different situations and locations? What is the legal framework (e.g., is it permitted to sail without GPS)? How can crew be trained and prepared for potential GPS signal loss? Which equipment is dependent on GPS? What technological alternatives are available? Can legacy positioning systems such as LORAN-C and Decca serve as viable alternatives? What is the impact of GPS disruptions on offshore installation projects (e.g., DP operations, survey, and construction activities)?