IEEE 1588 is designed for local systems requiring accuracies beyond those attainable using NTP. Each step is associated with quantitative predictions of latencies and accuracies. Such external perturbations are the limiting factor for the achieved accuracies of atomic-shell based clocks. Systems installed at yards usually works at lower speeds and are capable of higher accuracies. The differences are in the relative accuracies available to each. Alignment accuracies can be improved using this model, especially for proteins with low sequence identity. By WWII they had achieved accuracies of 0.1 second per day. Their goal was to suggest methods that increased the accuracies of eyewitness testimony. Improved techniques and equipment lead to accuracies of until about 1984. Often, the navigation of the collecting boat does not match today's GPS navigational accuracies. Speech recognition technology can have different accuracies depending on the user's accent. Laboratory grade instruments can have accuracies of a few parts per million. "Voyager 2" obtained 83 images with observation accuracies of to . Again, without resort to special equipment accuracies of 1 to 3 HLB are typical.