These are 5 position alpha-numeric codes comprising the d series. All other level II codes and descriptors are approved and maintained jointly by the alpha-numeric editorial panel (consisting of CMS, the Health Insurance Association of America, and the Blue Cross and Blue Shield Association).
Alaska: Although Alaska enjoys a high volume of aurora activity, its cruises are not often mentioned as northern lights cruises. During the Alaska cruise season, it's rarely dark enough for the lights to be visible.
Although it would be great to easily pinpoint a how to see them, there are a lot of variables to consider for seeing them: season, weather, length of stay, location and luck. Of course, there are lots of fantastic things to do in Iceland and itâs always best to think of seeing the northern lights as an added bonus. So e.g. plan your trip with unique experience like The Aurora Bubble and The Aurora Floating tours. You will come back happy even if you did not see any northern lights dance.