NavList:

Here is an article that addresses Viking navigation. 

http://phys.org/news/2013-04-errors-viking-sun-compass-hint.html

Something overlooked  may be the use of birds (sea birds and pigeons).

http://phys.org/news/2014-11-homing-pigeons-gyroscope-brain.html

Greg Rudzinski

From: Ed Popko
Date: 2016 Jul 3, 03:46 -0700

Real Viking Ship Completes North Atlantic Crossing

The world’s largest viking ship has arrived in North America after crossing the North Atlantic Ocean on a journey from its homeport in Haugesund, Norway.

The Viking ship, named Draken Harald Hårfagre, set sail from Norway with its approximately 32 crew members in late April and made stops in Iceland, Greenland and Newfoundland, Canada, before making its way through the Saint Lawrence Seaway to Toronto for the Tall Ships Challenge Great Lakes 2016 festival this weekend.

http://gcaptain.com/ship-photos-of-the-day-real-viking-ship-completes-north-atlantic-crossing/


Home page of Expedition - Draken Harald Hårfagre
http://www.drakenexpeditionamerica.com/


Captain Björn Ahlander is shown with a “sunstone”, a claimed aid to navigation.   Previous NavList posts discuss the sunstone myth.   Direct link to navigation page. 
http://www.drakenexpeditionamerica.com/2016/05/24/navigating-in-the-viking-age/

The question now is how did they really make the voyage?  Coastal piloting?