The safegard of sailers: or great rutter : Containing the courses, distances depthes, soundings, flouds and ebbes, with the markes for the entringes of sundry harboroughs bothe of England, Fraunce, Spaine, Ireland, Flaunders and the sounds of Denmark, with other necessarye rules of common nauigation. Translated out of Dutch into English by Robert Norman hydrographer.