If you were out in the middle of the ocean during clear calm conditions and another ship traveled away from you at what?

Similar questions: middle ocean clear calm conditions ship traveled.

1 Strictly speaking, you can only see about 2.5 miles in any direction on earth. That's one degree of arc, and after that whatever you are looking at passes below the horizon. This is why cell phone transmissions can often be spotty.

They are line of sight from the tower, and if you are farther than a few miles away (negating terrain and signal bounce) you can lose your signal. But this limitation of the earth's curvature is not an impediment in many cases, and being on the ocean is one of them. I've heard people stranded on rafts being able to signal ships a hundred miles away.

Part of this is due to the reflective qualities of the water and atmosphere. Otherwise, I can't explain how it works...

Strictly speaking, you can only see about 2.5 miles in any direction on earth. That's one degree of arc, and after that whatever you are looking at passes below the horizon. This is why cell phone transmissions can often be spotty.

They are line of sight from the tower, and if you are farther than a few miles away (negating terrain and signal bounce) you can lose your signal. But this limitation of the earth's curvature is not an impediment in many cases, and being on the ocean is one of them. I've heard people stranded on rafts being able to signal ships a hundred miles away.

Part of this is due to the reflective qualities of the water and atmosphere. Otherwise, I can't explain how it works...

2 It also depends on how tall the ship is. That's why the lookouts and radar units always go as high up as possible. You can see (and be seen) a lot farther from the bridge of an aircraft carrier than you can from a row boat.

It also depends on how tall the ship is. That's why the lookouts and radar units always go as high up as possible. You can see (and be seen) a lot farther from the bridge of an aircraft carrier than you can from a row boat.

3 It very much depends on the height of the ship. But it also depends on the atmospheric conditions in the area. Is the air very clear?

Even a slight amount of mist or dust in the air will cut the visibility dramatically.

It very much depends on the height of the ship. But it also depends on the atmospheric conditions in the area. Is the air very clear?

Even a slight amount of mist or dust in the air will cut the visibility dramatically.

4 I thought a friend who was in the navy told me once from a battleship that you could see twelve miles before losing sight of another ship. Could that have been possible? .

I thought a friend who was in the navy told me once from a battleship that you could see twelve miles before losing sight of another ship. Could that have been possible?

5 It's a bit hard to describe without diagrams, but there's a big right triangle in which one leg is the radius of the earth and the hypotenuse is the radius of the earth + your height. The length of the other leg (which you can find by the Pythagorean theorem) is how far you can see. That's expressed as line-of-sight, rather than the arc of the earth, but the difference is small.

If you want to be more precise, the near leg of the triangle divided by the hypotenuse is the cosine of the angle, and you can use the angle and the diameter of the earth to determine the length along the ground. That's how far away the horizon is. An actual object on the horizon will be visible from a longer distance.

The web site below goes even further (and has pictures, to boot). mintaka.sdsu.edu/GF/explain/atmos_refr/d... .

It's a bit hard to describe without diagrams, but there's a big right triangle in which one leg is the radius of the earth and the hypotenuse is the radius of the earth + your height. The length of the other leg (which you can find by the Pythagorean theorem) is how far you can see. That's expressed as line-of-sight, rather than the arc of the earth, but the difference is small.

If you want to be more precise, the near leg of the triangle divided by the hypotenuse is the cosine of the angle, and you can use the angle and the diameter of the earth to determine the length along the ground. That's how far away the horizon is. An actual object on the horizon will be visible from a longer distance.

The web site below goes even further (and has pictures, to boot). mintaka.sdsu.edu/GF/explain/atmos_refr/d....

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