In the earliest Portuguese sailing manuals the tables supplied, only gave the north-southing or D. lat. made good by sailing along each rhumb.
Incwadi yokufundisa ukuzika yamaPortugal angaphambili noluhlu zaxhotyiswa, yanika kuphela umntlamzantsi okanye iD lat. eyazika kakuhle kwincam nganye enamashumi amathathu anesibini yekhampasi