sextant（）A、望远镜B、步话机C、六分仪D、舵机
sextant（）
- A、望远镜
- B、步话机
- C、六分仪
- D、舵机
相关考题：
The emergency alarm is sounded on （）(汽笛) according to master’s order.A、VHFB、whistleC、broadcastD、sextant
Post two lookouts with binoculars.（）A、安排两名瞭头，带上六分仪。B、安排两名瞭头，带上罗盘经。C、安排两名瞭头，带上雷达。D、安排两名瞭头，带上望远镜。
The emergency alarm is sounded on （）according to master’s order.A、VHFB、broadcastC、radioD、sextant
单选题Apparent altitude is sextant altitude corrected for（）.Aparallax and personal errorBinaccuracies in the reading and reference levelCvisibility and magnitudeDAll of the above are correct
单选题A sextant having an index error that is off the arc has a（）.Apositive correctionBdip errorCnegative correctionDsemidiameter error
单选题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（）.Aerror of perpendicularityBside errorCprismatic errorDcentering error
单选题sextant（）A望远镜B步话机C六分仪D舵机