The Portuguese don’t get enough credit.
They were an extremely tough bunch. Won a huge empire with a few hundred or a few dozen men, sometimes, against incredible odds.
And they were far ahead of the rest of Europe with tools and techniques just like this astrolabe, plus navigation guides (instrument positions of landmarks, of tides and currents and winds). A lot of the later Europeans copied their things directly, and often hired them (Magellan for instance) when heavy duty navigating had to be done.
Don’t expect them to get any credit in the larger media; they’ll find a round plain rock in Africa and insist Africans invented the astrolabe (and the Portuguese stole it). Can’t focus on European accomplishments, you know?
On a serious note reason Portugal might be slighted in the history from this period is that for more than half a century they’d been merged back into Spain (regaining independence in the second half of the 1600s).
Portugal was Europe’s most advanced society, not ton mention it also had the largest collection of sea maps then existing. Alas, all those maps which were SAP like document of the time were lost in the great Lisbon quake in the 18th century.
However, when Portuguese navigators arrived in Africa, they asked the Crown if they could remain since the living conditions were so superior - hot and cold fresh running water, sewers and more ... All that was then disappeared as the guns for slave trade ramped up, leaving the old African wooden cities to become just more jungle.