Document C: Magellan was worth defending by his navigational skills and not getting lost & not being way behind of days being lost, also by tasting water on which direction he suppose to go.
This how you know your place by by doing your own navigational skills. Yes, Magellan was very good at doing navigational skills by looking at the stars and tasting the water to seek on their destination.
You need to be very brave on whats coming up next heading towards your ship to protect it. Yes, Magellan is fearless on whats coming up next towards his ship and land.
You must focus on night times because there will be stars and stars lead directly to your destination. Yes, Magellan has good dedication and he focus very well at measuring & mapping the stars to know where he is going into the isolated sea.