CAIRO (Reuters) - Egypt’s Suez Canal Authority said on Friday that efforts by tug boats to free the stranded container ship had restarted after dredging operations were complete. “The tugging operations require the availability of a number of supporting factors including wind direction and tides, which makes it a complex technical process,” the authority said. Reporting by Momen Saeed Atallah and Yusri Mohamed; Writing by Nadine Awadalla; Editing by Aidan Lewis and Leslie Adler