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. Get a ringside seat to nature's own mesmerising light show. It's dark, you're outside and everything is quiet. Suddenly, a flicker of light in the sky grabs your attention.ne of your best chances of experiencing the Northern Lights is on a Hurtigruten voyage in the winter season. In fact, we're so confident that we have issued a Northern Lights Promise for our 12-day voyages between October and February.