“…Some initial steps towards developing such a set have been taken using corrected AIS position records (Masek et al, 2021). Level 3 might also include use of data beyond the AIS, such as Synthetic Aperture Radar (SAR) and optical imaging from low-orbiting satellites to determine ship class, size and speed (Purivigraipong, 2018;Riveiro et al, 2018), stationary mounted cameras, local radar, or similar instruments placed onto aircraft (Eaton et al, 2018). The addition of đ”đ” to the predictor set increased the AUC values of some classes by ~0.1 (Figure 7), suggesting the addition of other predictors could further increase the accuracy of the classification scheme.…”