JAKARTA, Dec 30 (Reuters) - A U.S. aircraft carrier group was headed for Indonesia's tsunami-hit Aceh province on Thursday and several other U.S. military ships were on course to the Bay of Bengal to help with relief operations, officials said. The carrier USS Abraham Lincoln and four other vessels will be stationed off Aceh on the northern tip of Sumatra island where the death toll from Sunday's earthquake and tsunami has risen past 47,000. Another group of seven U.S. military ships, including a helicopter carrier, steamed for the Bay of Bengal in the Indian Ocean. Lieutenant General James T. Conway,...