According to the recommendations of International Navigational Congress in 1912, the ratio of length to width at the entrance for cargo vessels is

• A. 5.5 and 6.0 to 1
• B. 6.2 and 6.8 to 1
• C. 7.4 and 7.8 to 1
• D. 8.2 and 8.5 to 1