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船长L<50m的机动船(单船),在航时应显的号灯有:()。 ①首灯; ②尾灯; ③舷灯; ④桅灯

发布日期:2021-03-22

船长L<50m的机动船(单船),在航时应显的号灯有:()。 ①首灯; ②尾灯; ③舷灯; ④桅灯
A

①②③

B

①②④

C

②③④

D

①②③④

试题解析

续航时间

续航时间又称之为“航时”。它是指飞机在不进行空中加油的情况下,耗尽其本身携带的可用燃料时,所能持续飞行的时间。

中文名
续航时间
应用学科
航空
性质
飞机最重要的性能指标之一
别名
航时
条件
飞机在不进行

机动船

机动船(powerboat),相对于人力船,是指机器产生动力的船舶。亦称“自航船”。依靠本船主机的动力来航行的船。可分为蒸汽机船、柴油机船、汽轮机船、燃气轮机船、电力推进船、喷水推进船、核动力船等。采用汽油机或船用挂机的小艇,常称为“摩托艇”。

中文名
机动船
定义
依靠本船主机的动力来航行的船
一级学科
工程技术
外文名
powerboat
类型
蒸汽机船、汽轮机船等
二级学科
船舶种类

单船

单船,又叫单船指导员,就是按照码头泊位划分的各个泊位上的所有生产作业的生产管理员。他们负责指导船舶装卸,解决或汇报船舶装卸中遇到的问题,督促检查船舶装卸作业人员的装卸进度和装卸质量,现场协调解决装卸技术问题。

中文名
单船
别名
单船指导员
外文名
Foreman
职责
指导船舶装卸

标签: l< 50m 机动船

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