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.
Northern Lights near the town of Svovaer in the Lofoten Islands Why Go: The northern town of TromsÃ¸ teems with Aurora Borealis activity when those extended summer days are long gone. Its location above the Arctic Circle, and within the Northern Lights zone, makes it one of the top places to view shimmering green lights.