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.
Alaska Cruises: Sail the Inside Passage with an Insider. Filled with icy fjords that tower over the Pacific Ocean while snowy peaks stretch towards the horizon, Alaska feels boundless. Yet incredibly intimate as you watch eagles nesting along coastal forests. Norwegian lets you explore all sides of Alaska the way locals see it, up close and personal on an Alaskan cruise.