http://wiki.answers.com/Q/What_technological_improvements_made_exploation_by_sea_possible_in_the_1400"
The compass and the astrolabe made navigation by sea, and therefore exploration, possible.
chicken and alfredo sauce
the printing press
late 1400's.
To spread Christianity
410 AD with the fall of Rome to 1400 with the start of exploration.
Prince Henry the Navigator is the one.
The 1400's with the age of exploration.
P
To trade with wealthy Asian Nations
interest fame money religion technology!
Advances in technology made these voyages possible. A new kind of ship, the caravel, was stronger built than earlier ships. That is what made the Europeans able to begin exploring foreign lands in the 1400's.