單項(xiàng)選擇題某船頂風(fēng)頂流航行,船速16kn,流速2kn,2h后相對(duì)計(jì)程儀讀數(shù)差為30'.0,計(jì)程儀改正率ΔL=-10%,則該船實(shí)際航程為()。
A.23'
B.25'
C.27'
D.30'
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1.單項(xiàng)選擇題某船頂風(fēng)順流航行,船速15kn,流速2kn,2h后相對(duì)計(jì)程儀讀數(shù)差為30'.0,計(jì)程儀改正率ΔL=-10%,則該船實(shí)際航程為()。
A.27'.0
B.30'.0
C.30'.6
D.31'.0
2.單項(xiàng)選擇題某輪順風(fēng)順流航行,船速18kn,流速2kn,風(fēng)對(duì)船舶航速的影響1kn,計(jì)程儀改正率-8%,0400計(jì)程儀讀數(shù)L1=100'.0,則2h后絕對(duì)計(jì)程儀讀數(shù)L2為()。
A.132'.6
B.137'.0
C.141'.3
D.145'.7
3.單項(xiàng)選擇題某輪順風(fēng)頂流航行,船速18kn,流速2kn,風(fēng)對(duì)船舶航速的影響1kn,計(jì)程儀改正率-8%,0400計(jì)程儀讀數(shù)L1=100'.0,則2h后絕對(duì)計(jì)程儀讀數(shù)L2為()。
A.132'.6
B.137'.0
C.141'.3
D.145'.7
4.單項(xiàng)選擇題某輪頂風(fēng)順流航行,船速18kn,流速2kn,風(fēng)使船減速1kn,計(jì)程儀改正率-8%,0400計(jì)程儀讀數(shù)L1=100'.0,則2h后絕對(duì)計(jì)程儀讀數(shù)L2為()。
A.132'.6
B.137'.0
C.141'.3
D.145'.7
5.單項(xiàng)選擇題某輪漂航,船上相對(duì)計(jì)程儀改正率ΔL=0%,海區(qū)內(nèi)有流,流速2kn,1h后計(jì)程儀航程為()。
A.0'.0
B.+2'.0
C.-2'.0
D.視海區(qū)內(nèi)風(fēng)、流方向而定
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