搜题

【单项选择题】

Officers use sextants to observe （）.

A、A. stars

B、B. celestial bodies

C、C. the sun

D、D. the moon

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更多“Officers use sextants to observe （）.”相关的问题

第1题

[] Officers observe ships with a pair of （）（望远镜）.

A、A.sextant B、B.binoculars C、C.compass D、D.radar

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第2题

[单选题] Navigators use navigational aids, such as（）（罗经）.

A、sextant B、binoculars C、compass D、loran

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第3题

[] （）is used for measuring horizontal and vertical angles.

A、A.The marine sextant B、B.Thechronometer C、C.The magnetic compass D、D.The gyrocompass

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第4题

[单选题] （）should ensure that adequate measures are taken to prevent alcohol and drugs from impairing the ability of watchkeeping personnel.

A、The quarantine officers B、Administrations C、The immigration officers D、The customs officers

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第5题

[] A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has（）.

A、A.error of perpendicularity B、B.side error C、C.prismatic error D、D.centering error

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第6题

[] （）is an equipment used to detect the presence of ships ,buoys,coast and many other targels and to obtain range and bearing of these targets.

A、A.The marine sextant B、B.The chronometer C、C.The echo sounder D、D.The radar

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第7题

[单选题] No deduction is allowed for the（）mess-room in ships having passenger accommodation，which are not also provided with a passengers’ mess-room.

A、officer B、officers C、officer's D、officers’

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第8题

[单选题] The well preparation of stowage plan will（）.

A、increase the ship's officers' knowledge B、extend the ship's officers' knowledge C、improve the ship's cargo-handling equipment D、raise the working efficiency

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第9题

[单选题] sextant（）

A、望远镜 B、步话机 C、六分仪 D、舵机

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