Navy training exercises could expose 94,370 marine mammals to behavior-altering sonar frequencies each year, potentially injuring or killing as many as 30, according to an environmental impact statement released Friday by the Navy. But in its 1,796-page report, the Navy sticks with current safeguards for protecting marine animals, not adopting stricter standards imposed by a federal judge earlier this year. Green groups are likely to challenge the EIS in court, continuing a seemingly neverending cycle of litigation and appeals.