现代国际合作的发展趋势主要表现在？

A. 从对端TDS侧取时钟
B. IP时钟
C. 伽利略时钟
D. GPS

A. Passenger tours available upon docking
B. Long port stays necessary to secure vehicles
C. Short in port turnaround times
D. Heavy vehicles only require lightweight securing equipment

A. 正确
B. 错误