SW is four quarter-winds below west, so looking up the toleta de marteloio, the ship sailing 200 leagues on "actual" SW course would achieve an "avanzar" of 142 leagues (71 × 2) on the "intended" Westward course.
SW is four quarter-winds below west, so looking up the toleta de marteloio, the "avanzar" is 71 for every 100 miles sailed. So a ship sailing 300 leagues to on "actual" SW course to Cape Verde would achieve an "avanzar" of 213 leagues (71 × 3) on the "intended" Westward course.