December 19, 2009 18:51
Ha! Welcome to my world. This is an ordinary thing for ENCs over large areas of Alaska. There is no data for that section. I see this for several reasons. In some cases the area has never been surveyed. In other cases it appears that the ENC was released before all of the survey data were added. I seriously doubt that your area has never been surveyed. Since ENCS have the advantage of being easily updated there is a very good chance that the remaining data will be added soon. US ENCs are free so I download a new set periodically and I've seen many of the problem areas fixed. Your chart could be updated in a week, or never, depending on the agency responsible for it.
Edmund