How did prince henry's new navigational equipment sailors

I am assuming you are talking about prince Henry the Navigator.

well he used the compass, trigonometry, and the astrolabe. these advances in navigational equipment allowed sailors to make longer voyages so they can explore more lands.

 Shay's rebellion was important to highlight the problems with the Articles of Confederation because it showed the people and government how terrible the Articles couldn't handle a crisis. 

 Many of the poorer people had to take large loans to keep their farms functioning while they were off fighting in the revolution. When the war ended, they had no money to pay the creditors back, who began pressing for the money. 

I hope this helps.