LOS ANGELES - The 75-foot dive boat Conception was considered one of the best of its kind in the region, and both it and its operator, Truth Aquatics Inc., were in compliance with U.S. Coast Guard regulations. That all changed Monday in the flash of a predawn fire near Santa Cruz Island, when the Conception sank in flames, taking with it more than 30 people who were below deck in bunk beds, apparently unable to get out.