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A magnetic compass can be influenced by surrounding metal. For instance, take a compass bearing when your pocket knife is in your breast pocket, too close to the compass, or there is an underground metal water pipe near by, may cause an error in your compass reading. Even magnetic (iron) rocks you are standing on, can cause a wrong reading. When taking a magnetic bearing, leave your metal framed rucksack to one side.
Wiki User
∙ 8y ago
God Level
Wiki User
∙ 13y agoThere is no real problem of using a magnetic compass at sea. Nowadays though, the majority of vessels out at sea would/should be using GPS navigation.
Underdragon Proo98
It can be made cheap and not work right
the needle starts to point up or down when getting closer to the poles, because of the so-called magnetic inclination.
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What is a sentence using momentum?
My momentum carried me over the edge and into the sea.
How has science helped to solve electricity problems?
sollar energy, wind, atom,hydro,sea waves
Explain how the reversal of earths magnetic poles can be produce a calendar for part of earths history?
In rock formed when the sea floor is being built, such as at the mid-Atlantic ridge, the minerals preserve the magnetic polarity. Since the flipping of the poles is fairly regular, the count of the bands can give a time.
How would you determine whether the risk of collision exist between your vessel and another vessel?
The standard answer is constant bearing. As soon as a another vessel is sighted at sea, you take a compass bearing on it, and you keep on taking compass bearings. If the bearing does not change, you are on a collision course. If it's on your port side, do nothing. If it's on your starboard side, give way by changing speed or course.
Why does an object weigh less at the top of the mountain than does at sea level?
It has to do with Earth's gravitational force. The farther away an object is from the object it is attracted to (in this case, the solid, magnetic core of the Earth), the less effect the force of gravity has on it.
What was the role of the astrolobe in terms of explorers?
Astrolabe was an instrument used to find directions in travel over the sea or desert; its role was sort of old magnetic compass!
Why did they invent the compass?
The original purpose of the magnetic compass was to help sailors to know which direction they should point their ships while they were sailing beyond the sight of land. On the open sea, you need some way of figuring out where you are and in which direction your destination lies, since the sea is relatively featureless and looks pretty much the same everywhere.
Why did they invent compass?
The original purpose of the magnetic compass was to help sailors to know which direction they should point their ships while they were sailing beyond the sight of land. On the open sea, you need some way of figuring out where you are and in which direction your destination lies, since the sea is relatively featureless and looks pretty much the same everywhere.
What are magnetic compasses?
It is the oldest instrument for navigation and has been a vital tool for navigators at sea for centuries. The compass allows ships to steer a selected course. By taking bearings of visible objects with a compass, the navigator is also able to fix a ship's position on a chart.
The angle of magnetic declination on a topographic map is the angle by which a compass point varies from?
True north. True north and magnetic are not the same, in fact magnetic north moves and over the eons has flipped between north and south in a sudden and dramatic fashion. We are able to see these shifts in the cooling of the magma in the sea floor spreading.
How magnetic reversals provide evidence for sea floor spreading?
Because of the stripes at the sea floor which are magnetic minerals
What is magnetic striping evidence?
Magnetic reversals and sea floor spreading.
What Magnetic striping evidence of?
Magnetic reversals and sea floor spreading.
Magnetic striping of evidence of?
Magnetic reversals and sea floor spreading.
What is magnetic striping evidence of?
Magnetic reversals and sea floor spreading.
Which seas have compass directions in there names?
the north sea
How could a compass help you if you were lost at sea in a life boat?
you can look at the compass and it will tell you where to go or if you have a special compass it will track down your tracks and you can follow it back
