Final Fantasy II/Key items

Items necessary to advance in the plot, few of them have uses throughout the full video game.
 * Ring: shows the world map; push B and Select, as in Final Fantasy 1;
 * Canoe: allows to travel on freshwater (rivers and lakes, but not open seas);
 * Snowcraft: allows to travel on the glacier;
 * Wyvern: use it in battle to breath fire on the enemies.