单选题某船顶风顶流航行,船速16kn,流速2kn,2h后相对计程仪读数差为30'.0,计程仪改正率ΔL=-10%,则该船实际航程为()。A23'B25'C27'D30'
单选题
某船顶风顶流航行,船速16kn,流速2kn,2h后相对计程仪读数差为30'.0,计程仪改正率ΔL=-10%,则该船实际航程为()。
A
23'
B
25'
C
27'
D
30'
参考解析
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