Suppose we are trying to navigate with just a compass and lag (dead reckoning, plus some latitude measurements), like people did before they started using chronometers and lunar distances method. What typical error can we expect? Does anybody have examples of illustrations with actual and perceived tracks?
So far, I found an article "The Empirical Reconstruction of Columbus’ Navigational Log and Track of his 1492–1493 Discovery Voyage" of Colonel Peck that shows actual and perceived tracks in one of Columbus's voyages. (there is also one more map there)
Also, I found map in Steven Callahan book(sorry, legend is in Russian):