Photocopies of passenger lists, ship damage

I have 3 questions about the ship records: (1) I recently found a passenger list for my great grandfather, Olaf Anderson (not Amunson) Asp, and the ship Nornen which left Christiana April 19 and arrived at Quebec July 6th, 1868, ID 1349. Your information says I can request a photocopy of the list from the NAC. What is the NAC and how do I contact them? (2) Did these ships continue the voyage through the great lakes as my great grandfather lists the port of Chicago as the point of entry on his naturalization records? (3) A family story also has the ship loosing its rudder in a bad storm which delayed the arrival in America. Due to the delay a son was born on the ship just before arrival. Where would I look for this information? Thank you in advance for your help.