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为了保证船舶航行安全,首先要确定船舶的航向与位置。船舶定位方法按照参照目标可分为( )。

The fresh water generator produces fresh water ().
What is the most usual reason for the fresh water-sea water heat exchanger fouling in the sea side?
You should not divide the fresh water()three trips.
Fresh water is used for the cooling of cylinder jackets and () of the marine diesel engine.
Prior to getting underway in fresh or brackish water,the Master must().
In a domestic fresh water system, the pump starters are controlled by () switches which operate when the pressure in the tank varies within predetermined limits as water is drawn off.
One reason for the present interest in both polar regions is that the world may soon be _________ fresh water. 选项
It is important with all hydraulic systems to ensure that interlocking arrangements provided for pump or motor control levers are () before the pump driving motor can be started.
The pressure head of a water pump is given in the unit of ().
Most air conditioning units have () for adjusting the ratio of recirculated fresh airCare must be taken not to reduce the fresh air so that stuffiness or smells arise.
About the jacket water, that of the auxiliary engines usually() is circulated by pumps, and the main engine usually ()
When the density of water is 1000,i.e.in fresh water and in summer zone a ship may load to the upper edge of the line marked().
The motor for the fresh water pump ().
Allowance for fresh water refers to().
The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the().
If the discharge valve is closed before the drive motor is stopped, which of the following types of pumps will most likely be damaged?()
How long is the economic distance for motor? ()
The master got permission to pump out 500 tons of clean sea water for ().
The centrifugal pump component responsible for converting the mechanical energy of the liquid being pumped, to that of kinetic energy is the ().
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