記憶度
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1
allowing the user to hold both the map and the compass in one hand while travelling at speed by bike or by canoe.
Thumb compass
2
the lines connecting points of equal magnetic dip
Isoclinic line
3
In this modern digital world, compass are becoming more popular. These use many of the electronic magnetic sensors which would calculate the accurate direction the compass is pointing
Solid state compass
4
for directional readings since the moving card absorbs much of the motion of the boat.
Card compass
5
are rapidly replacing the use of other traditional compasses. However, most military and ships use the gyro compass or magnetic compass if GPS compass could not pick up enough satellite. Many hikers and drivers like this compass due to its relative reliability.
Gps compass
6
What is the term used for magnetic properties similar to those of iron. In other words, you can make a magnet out of it?
Ferromagnetic materials
7
the ship's heading shown by master compass by means of a signal from the transmission unit.
Repeater Indicates
8
What is the term used for the angular difference between the true north and magnetic variation?
Variation
9
It is a sophisticated device designed for highly accurate navigation. The prism sighting arrangement allows the user to read the compass bearings while seeing distant objects.
Prismatic compass
10
What is the term used for a fixed point on the globe?
Geographic North
11
This compass relies on the direction of celestial bodies to find true north, which is used in many circumstances, mainly in the far north and south poles where magnetic compass would become erratic and gyro compass stops working.
Astrocompass
12
What type of magnetism remains after the exciting force has been removed?
Permanent Magnetism
13
Iron or steel which is NOT readily magnetized by induction, but which retains a high percentage of the magnetism acquired.
Hard iron
14
It is a special type of compass developed in 19th century which determines the true north. The gyro compass is commonly used in large ships and in other circumstances where the accurate prediction of true north is needed
Gyro compass
15
the line connecting zero magnetic dip.
Aclinic line
16
What part of gyro compass used for converting the ship's power supply into the power necessary for operating the static inverter and transmission units?
Power Adopter
17
What part of the ship does not belong on permanent magnetism?
Masts
18
The magnetic compass was first invented as a device for divination as early as the Chinese?
Han dynasty and Tang dynasty
19
What is the term used for which the magnetization of magnetic material is in a uniform direction?
Domain
20
What type of magnetism refers to a non-magnetic iron is placed near a magnet it gets magnetized. As soon as the magnetic field disappears, the magnetism of the magnet is lost?
Induced Magnetism
21
What part of gyro compass helps for computing and amplifying circuit components?
Control Cabinet
22
What is the term used as deflection right or left of the magnetic meridian?
Deviation
23
What part of the ship does not belong on induced magnetism?
Hull
24
It is a course whose bearing is relative to the meridian. by
True Course
25
What is the angle between the Earth's magnetic field and the Earth's surface?
Inclination
26
What is the angle between vertical and horizontal line of force?
Angle of Dip
27
China by the military for navigational orienteering by?
1040-44
28
What part of gyro compass consist of amplifiers and repeater switches
Transmission Unit
29
What is the term used for the process of rotating object's tendency to maintain it's orientation?
Gyroscopic Motion
30
It is a part of magnetic compass that indicates direction to the Earth's magnetic field or the approximate position of north or south.
Magnetic Needle
31
Iron or steel which is easily magnetized by induction, but losses its magnetism when the magnetic field is removed? can be demagnetized once it is magnetized.
soft iron
32
What is the term used for line of force?
Magnetic Flux
33
What type of magnetism may change in strength due to collision with another vessel, struck by lightning or moored on a constant heading for a long period?
Sub-Permanent Magnetism
34
is used in ships mainly for the purpose of steering. Since the compass is an electronic one, th errors is greatly re
Fluxgate compass
35
Who First use Magnitic Compass?
Song dynasty
36
consists of a sensitive element of gyroscope?
Master Compass
37
At what year does magnetic compass used for maritime navigation?
1111-1117
38
It is the most affordable compass. This compass includes a magnifying lens for map reading, luminous components for low light conditions and different scales for world wide use.
Base plate compass
39
What lines connect points of no magnetic variation?
Agonic Line
40
Who invented gyroscope?
Jean-Bernard-Leon Foucalt
41
What lines connect points of equal point magnetic variation?
Isogonic Line
42
The deviation of the compass from true north is an angle called?
Declination
43
the direction in which the north end of a compass needle or other freely suspended magnet will point in response to the earth's magnetic field
Magnetic North