sentences:  the running of the Lisbon dockyards, the construction of ships, the hiring and training of crews and supplying the fleets with equipment - sails, ropes, guns, nautical instruments and maps.The "Piloto-Mor" of the Armazem, a position held between 1503 and 1526 by Pero Anes, Gonçalo Álvares and João de Lisboa, was probably responsible for the training of pilot-navigators and the drafting of navigational charts.In 1547, the position of "Cosmografo-mor" (High-Cosmographer) was created for the famed mathematician Pedro Nunes and the cartographic duties passed over to him.