Vegetius said that sailing was safe from May 27 to September 14 but that the two doubtful, or dangerous, periods ran from September 15 to November 11 and from March 11 to May 26.
اما از ۱۵ سپتامبر تا ۱۱ نوامبر و از ۱۱ مارس تا ۲۶ مه ،‏ وضعیت دریا غیرقابل‌پیش‌بینی و خطرناک است .‏ »