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How Far Can You See at Sea?( offshore oil drilling )
http://www.dublerfamily.com/Activity3.html ^ | November 26th | Me

Posted on 11/26/2008 4:23:55 AM PST by Halfmanhalfamazing

Where our line of sight hits the horizon is the distance from our boat to the horizon. A small boat first coming into view is assumed to be at that distance. In the picture above, the sailor cannot see the island's palm trees.

If an object, such as a large ship or a palm tree on an island, sticks up well above the water, we can see it from a further distance.

Here is how we can calculate how far we can see from a boat on the sea.

First let's assume that we are sitting in the cockpit of the boat and our eyes are 5 feet above the water and the seas are smooth. We can then look at the table below to see that we can see only 2.6 nautical miles to the horizon.

Now if we are looking at a palm tree on an island, we must determine how far the palm tree can see, or really how far someone on top of the palm tree can see. Let's assume the palm tree is 30 feet tall. Looking at the table, we can see the sight distance is 6.4 nm. To determine how far that palm tree is from our boat, when we first see it, we add our sight distance, 2.6 nm, to the "tree's sight distance", 6.4 nm, and find that we can see the palm tree from 9 nautical miles. This of course assumes no fog, rain, or other conditions that might obscure our view.

In case you were wondering about other heights, like when the deck of your boat is 4 feet over the water and your eye is another 4 feet over the deck, here is the calculation for finding sight distacne for any height.

Visible distance (in nm) = 1.17 x the square root of the height (in feet)

Try a few other combinations. For example, how far away could you be and see the first offshore oil rigs in the Gulf of Mexico?


TOPICS: Education; Reference
KEYWORDS: ban; drillheredrillnow; drilling; economy; energy; envirowhackos; globalwarming; greens; offshoredrilling; offshoreoil; oil; seeatsea; vision
This gives a brief explanation of how far the human eye can see at sea. It gives a table of relation between height of object vs nautical miles.

Why this is important is because the oil drilling debate will be back, and it's an important thing to know.

Which means that an offshore oil drilling ban any further than somewhere around 25 miles is lunacy. Sure, higher height rigs would be visible around this distance, but you have to keep in mind the context. It would be a small black dot on the horizon.

This is hardly a problem for tourism.

Especially if these rigs are painted sea blue. Then you wouldn't see them at all.

1 posted on 11/26/2008 4:23:56 AM PST by Halfmanhalfamazing
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To: steelyourfaith
Hey, take a look at this. If you would; if you think it applies, you should ping your global warming peeps to this.

Considering how eeeeeeeeeeeeeevil oil drilling has been tied to the global warming debate, knowing how far the human eye can see is a good thing to know when this comes back. At least I think.

2 posted on 11/26/2008 4:27:18 AM PST by Halfmanhalfamazing (There is no "rich". There is only "the hiring class".)
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To: Halfmanhalfamazing
I think 25 miles is the perfect distance. Grouper and Snapper fishing would be even better than it is now if we had platform foundations to fish around.
3 posted on 11/26/2008 4:27:45 AM PST by Damifino (The true measure of a man is found in what he would do if he knew no one would ever find out.)
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To: Damifino

Yeah, I know a few people who scuba dive and they all say the same thing about that; that these rigs make good artificial reefs after a while.


4 posted on 11/26/2008 4:31:16 AM PST by Halfmanhalfamazing (There is no "rich". There is only "the hiring class".)
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To: Halfmanhalfamazing
Here is the numbers.

Height (feet)
Distance (nm)
5
2.6
10
3.7
15
4.5
20
5.2
25
5.9
30
6.4
35
6.9
40
7.4
45
7.8
50
8.3
55
8.7
60
9.1
65
9.4
70
9.8
75
10.1
80
10.5
85
10.8
90
11.1
95
11.4
100
11.7
120
12.8
150
14.3
200
16.5
250
18.5
300
20.3

5 posted on 11/26/2008 4:33:14 AM PST by Halfmanhalfamazing (There is no "rich". There is only "the hiring class".)
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To: Halfmanhalfamazing

From the bridge of a US Navy deystrouer you can see from 7-10 miles depending on swells


6 posted on 11/26/2008 4:36:46 AM PST by garykfd (American by Birth, Southern by the Grace of God!)
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To: Damifino

The perfect distance is where the oil is, not where you can’t see the oil rigs. If there was any “Constitutional Right to an unobstructed Scenic View” we should be tearing down those ugly skyscrapers and all the ugly billboards and business signage.


7 posted on 11/26/2008 4:38:25 AM PST by bitterohiogunclinger (America held hostage - day 22)
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To: Halfmanhalfamazing
It doesn't take any time for fish to congregate on it. The pelagics, Dolphin (Mahi), Wahoo and Tuna would be there in a matter of a few days.
8 posted on 11/26/2008 4:42:00 AM PST by Damifino (The true measure of a man is found in what he would do if he knew no one would ever find out.)
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To: Halfmanhalfamazing

When I was in the upper penninsula back in July, we spent half a day sitting on a bluff at Grand Marais watching for ore carriers. We only saw one and it was little more than a speck on the horizon even with good binoculars.


9 posted on 11/26/2008 4:43:25 AM PST by cripplecreek (The poor bastards have us surrounded.)
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To: bitterohiogunclinger
The 25 mile number had nothing to do with the view. it was solely based on optimal fishing benefits.
10 posted on 11/26/2008 4:44:48 AM PST by Damifino (The true measure of a man is found in what he would do if he knew no one would ever find out.)
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To: bitterohiogunclinger

The facts show how nonsensical and uninformed the public is about nonexistent environmental issues.

I doubt a single human being on Earth, other than oil workers, can see oil drilling on the Alaskan shelf.

Just madness, and I guarantee OPEC pays off our politicians.


11 posted on 11/26/2008 4:45:36 AM PST by Williams (It's The Policies, Stupid.)
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To: Williams
“Just madness, and I guarantee OPEC pays off our politicians.”
Without a doubt. DemonRATs collect double from the environmentalnuts and the Foreign Enemies of America. Does anyone other than me find the whole incredible run up of the price of energy followed by the all too convenient economic disaster a little too conveniently timed to favor DemonRATs to be just coincidental?
12 posted on 11/26/2008 4:56:58 AM PST by bitterohiogunclinger (America held hostage - day 22)
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To: bitterohiogunclinger

^^^^^^^^^^^^^^The perfect distance is where the oil is, not where you can’t see the oil rigs.^^^^^^^^^^^

That’s not necessarily true anymore with the invention of slant drilling.

^^^^^^^^^^^If there was any “Constitutional Right to an unobstructed Scenic View” we should be tearing down those ugly skyscrapers and all the ugly billboards and business signage.^^^^^^^^^^^

Agreed.

However, I’m sure we could all agree on a reasonable expectation. I actually would think it’d be kind of cool if some beaches had rigs right there that you could see. But I marvel at all things. Human inventions such as skyscrapers, bridges, and earthmovers are fantastic. So are big trees, waterfalls, and things you see out in nature. I’d love to go see a rainforest one day.

But others aren’t like me who can see something good in just about everything.

Even the Kennedys pushed wind away from their shores because they were eyesores.

But with everything said, I’m sure you can agree with me that this is important to know. I’m surprised someone else hasn’t tied these two together.


13 posted on 11/26/2008 5:11:34 AM PST by Halfmanhalfamazing (There is no "rich". There is only "the hiring class".)
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To: Williams

^^^^^^^^^^^^^^^^^^The facts show how nonsensical and uninformed the public is about nonexistent environmental issues.^^^^^^^^^^^^^^^

Which is why I hope in the coming minutes, hours, and days you’ll be emailing this information to as many people as you can.

:-)

You know as well as I do that the media isn’t gonna educate them. So it’s up to us.


14 posted on 11/26/2008 5:13:16 AM PST by Halfmanhalfamazing (There is no "rich". There is only "the hiring class".)
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To: bitterohiogunclinger
Does anyone other than me find the whole incredible run up of the price of energy followed by the all too convenient economic disaster a little too conveniently timed to favor DemonRATs to be just coincidental?

Nope. And, once he is inaugurated, the price will start to skyrocket again and, this time, it will hit astronomical levels. Whoever is manipulating the oil market knows that the Obamessiah will do nothing towards American energy independence.

15 posted on 11/26/2008 5:15:08 AM PST by DustyMoment (FloriDUH - proud inventors of pregnant/hanging chads and judicide!!)
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To: DustyMoment

IMO, whoever is manipulating the oil market (and the economy) is also manipulting Obama...He is a puppet on strings....


16 posted on 11/26/2008 6:04:04 AM PST by Boonie
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To: Halfmanhalfamazing; Little Bill; IrishCatholic; Normandy; Delacon; ...
 




Beam me to Planet Gore !

17 posted on 11/26/2008 6:07:10 AM PST by steelyourfaith
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To: Damifino
ALL fishing is better around oil platforms. The bigger varieties come to feast upon the smaller varieties. When we had our boat we always headed straight to the rings off Freeport and Galveston and I have the pictures to prove it!
18 posted on 11/26/2008 6:14:03 AM PST by Ditter
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To: steelyourfaith

Thanks!


19 posted on 11/26/2008 6:48:07 AM PST by Halfmanhalfamazing (There is no "rich". There is only "the hiring class".)
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To: Halfmanhalfamazing
Thank you!!! That was very interesting.

The spill issue with regard to off-shore drilling is another ruse, yet ...


20 posted on 11/26/2008 7:03:36 AM PST by steelyourfaith
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To: steelyourfaith

1: http://hotair.com/archives/2008/07/14/mother-nature-the-biggest-oil-polluter-on-earth/

2: http://www.freerepublic.com/focus/news/2056580/posts

3: I wish I had a link for that one.

:-)


21 posted on 11/26/2008 7:17:53 AM PST by Halfmanhalfamazing (There is no "rich". There is only "the hiring class".)
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To: Halfmanhalfamazing
Rush 24/7 on August 5, 2008

"....  Our buddies, our buddies at CNN, they're preparing a retrospective special, ladies and gentlemen, on the disaster that was the oil spill at Prince William Sound or the Exxon Valdez.  What they will not tell you is that if you go up there today, you won't find any evidence of it, other than the stupid memorials that human beings built.

"This is where oil was on the rock. This is where the otter got eaten by the shark when we threw it back in there, and the sea lion or whatever ate the otter."  Nature cleaned up itself so damn fast.  It was such a laughable thing to watch people with dishtowels and Dawn dishwashing detergent wiping oil off of the rocks at Prince William Sound.  Oh, it was an unpleasant sight.  Of course, the birds got oil on their wings, and it was not pleasant to look at, but it's an accident.  The skipper of the Exxon Valdez did not say, "I want to destroy America! I want to destroy Alaska," and then let the stuff go.  But anyway, the sea eats oil. The sea eats oil alive.  That place up there, nature cleaned it up faster than we ever could. Why in the world this abject hatred for a commodity?  I mean, I can understand if you're a little kid, and you don't like peas or broccoli, but an entire political party and an ideological movement has now targeted oil as as big a threat to this country as conservative Republicans are! It's hard to get your arms around it."

22 posted on 11/26/2008 7:29:12 AM PST by steelyourfaith
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To: steelyourfaith

Oh yeah, I think I may have heard that.

Thanks.


23 posted on 11/26/2008 9:41:43 AM PST by Halfmanhalfamazing (There is no "rich". There is only "the hiring class".)
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To: All

The highest point of a rig is its flame tower, which is about 70 metres above the sea

http://news.bbc.co.uk/2/hi/uk_news/4576351.stm


24 posted on 12/04/2008 5:43:40 PM PST by Halfmanhalfamazing (There is no "rich". There is only "the hiring class".)
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To: Halfmanhalfamazing

The equation is this: Visible distance (nautical miles) = 1.17 × Square root
of the height (feet)

What that means is that an oil derrick 100 feet tall would be entirely below the
horizon at 11.7 nautical miles (13.5 statute miles) from shore. (Multiply
nautical miles by 1.15 to get statute miles.) If painted sea green/blue, they’d
be invisible even closer.

A 400-foot wind turbine would be entirely below the horizon at 23.4 nautical
miles (26.9 statute miles) from the Kennedy clan’s retreat on Cape Cod.


25 posted on 12/31/2008 3:27:51 AM PST by Halfmanhalfamazing (I do not support the federal government's terrorist bailout plan ; Gitmo needs to stay put)
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To: Halfmanhalfamazing
How Far Can You See at Sea?

To the point you fall off.

26 posted on 12/31/2008 3:30:58 AM PST by bmwcyle (McCain had no honor when he failed to defend Sarah Palin, Leno was not enough)
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