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单选题 What may affect the accuracy of sounding with echo sounder
学科：默认课程
时间：2026-05-17 03:37:24
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题目1单选题
The "Mode"selector switch on the autopilot steering stand is used to select any of the following with the EXCEPTION of( )A. automatic pilot steeringB. hand-electric steeringC. non-follow-up steeringD. rudder adjustment
题目2单选题
When steering by autopilot, how often should manual steering be checkedA. Every dayB. When tine allowsC. At least once a watchD. NO checking is necessary
题目3单选题
While steering by autopilot you notice that the vessel has deviated 12 degrees from course and there is no corrective rudder being applied.As a standard operating procedure you should firstA. check the setting of the rudder adjustmentB. check the setting of the weather adjustmentC. switch to hand steeringD. immediately engage the trick wheel
题目4单选题
If the mode switch is in the "HAND" position, ( ) can be done with the steering handle at any timeA. follow-up steeringB. non-follow-up steeringC. automatic steeringD. remote control steering
题目5单选题
Rudder position is show on the bridge by the( )A. Rapson side indicatorB. Follow upC. Rudder angle indicatorD. Telemotor position
题目6单选题
All echo-sounders can measure theA. actual depth of waterB. actual depth of water below keelC. average depth from waterline to hard bottomD. average depth of water to soft bottom
题目7单选题
What may affect the accuracy of sounding with echo sounderA. Sea bottomB. Ship's speedC. Speed of currentD. Water temperature and density
题目8单选题
sends a radio signal from the bottom of the ship to the sea-bed, from which it is reflectedA. The marine sextantB. The chronometerC. The echo sounderD. The radar
题目9单选题
Which one should be preset for echo sounder in order to avoid groundingA. GainB. RangeC. FrequencyD. Shallow alarm
题目10单选题
Which of the following descriptions of the echo sounder is falseA. The echo sounder is used to determine the depth of the sea floorB. Echo sounders rely on the same principles that radar and ultrasound utilizeC. An echo sounder is a safety device which can alert a ship to dangerous changes in the level of the sea floorD. The flow of current interferes the reading of an echo sounder most
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