Measuring distances in the Ocean.
- Thread starter mudcat100
- Start date
May want to recheck that.
One knot forward speed = one nautical mile = approx. 1.15 statute mile.
vigil617
US Veteran
I have done this myself, and yes, it is a ton of fun. That's the yellowfin (mostly) tuna run, with a few blackfin mixed in. The giant bluefins are also caught off the North Carolina coast, sometimes quite close to shore, but that's a whole other fishery.
The folks who figured around 185 statute miles are, I think, probably right. My own math came out to about 205 miles but I did some averaging in my computations.
And yes, a nautical mile is different from a statute mile, being 2,000 statute yards instead of 1,780.
Little known fact: there are 15 degrees of longitude in each time "zone" from Greenwich, England, which is at 0 degrees. (24 hours in a day, one revolution of the earth, 360 degrees, so 15 degrees each, right?) Each is assigned a number and letter. Nags Head and Myrtle Beach are both in the "+5 R" zone, five zones west of Greenwich, except during daylight savings time, when it becomes "+4 Q". So, times there are either 5 hours earlier than at Greenwich, or 4 hours during DST.
Within those zones, the time of, for instance, sunrise can vary up to half an hour according to position within the zone. Nominally, sunrise is based on the middle of the zone -- in other words, 7.5 degrees from the "edges". On ships at sea, it's good navigation practice to compute sunrise and sunset for the ship's actual position to know when to turn on and turn off the navigation lights per the nautical rules of the road -- especially on cloudy days.
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IndianaDave
Member
I still have to say it if I have to do infrequent trig. Thank you and RIP Father Cylwicki sophomore trig.
SC_Mike
Member
[ame]https://www.youtube.com/watch?v=ZBAijg5Betw[/ame]
The real question is, why would someone want to go to Myrtle Beach?
The real question is, why would someone want to go to Myrtle Beach?
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kozmic
Member
I have done this myself, and yes, it is a ton of fun. That's the yellowfin (mostly) tuna run, with a few blackfin mixed in. The giant bluefins are also caught off the North Carolina coast, sometimes quite close to shore, but that's a whole other fishery.
The folks who figured around 185 statute miles are, I think, probably right. My own math came out to about 205 miles but I did some averaging in my computations.
And yes, a nautical mile is different from a statute mile, being 2,000 statute yards instead of 1,780.
Little known fact: there are 15 degrees of longitude in each time "zone" from Greenwich, England, which is at 0 degrees. (24 hours in a day, one revolution of the earth, 360 degrees, so 15 degrees each, right?) Each is assigned a number and letter. Nags Head and Myrtle Beach are both in the "+5 R" zone, five zones west of Greenwich, except during daylight savings time, when it becomes "+4 Q". So, times there are either 5 hours earlier than at Greenwich, or 4 hours during DST.
Within those zones, the time of, for instance, sunrise can vary up to half an hour according to position within the zone. Nominally, sunrise is based on the middle of the zone -- in other words, 7.5 degrees from the "edges". On ships at sea, it's good navigation practice to compute sunrise and sunset for the ship's actual position to know when to turn on and turn off the navigation lights per the nautical rules of the road -- especially on cloudy days.
Sorry Chip, but my eyes glazed over right after the part about fishing.
To the OP...I think you could walk it in a few days however you'll want a second opinion before you lace up your Nikes.
Copied from "The Sundial Primer"
Found this interesting for I'm looking for distance calculation.
The math seems straightforward but I don't know the difference between cosine and cosign.
Get divorced. It'll become painfully clear.
vigil617
US Veteran
Sorry Chip, but my eyes glazed over right after the part about fishing.
To the OP...I think you could walk it in a few days however you'll want a second opinion before you lace up your Nikes.
I have the highest regard for mudcat100, Rick, but I doubt that even he could make the walk due east of Myrtle Beach for 185 miles, Nikes nothwithstanding.
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5Wire
Member
Easting would look a lot like this:
DWFAN
US Veteran
Coldshooter
Member
And if you were traveling at a rate of 100 leagues per fortnight how many hours would the trip take.
While current and jet streams do effect travel time they do not effect actual distance. Doing it by lat long requires that you first do the lat foor both positions. Subtracting one from the other and converting to miles. Lats remain constant. Dodo the long is more complicated. First change in long at highest lat, converted to miles at that lat, then change at lowest lat. converted to miles. Add those together and divide by 2. This will give you the average. Then take that measurement squared add it to the lat measurement squared and solve for square root. Or take a good globe and stretch a string from A to B and use the globes scale. A globe is in proportion and a string pulled tights will go the shorted distance on a curved surface. Great circle route,
THE PILGRIM
Member
The Drinking Sailors don't bother with a Great Circle.
They prefer the Rum Line. (Rhumb)
Rhumb line - Wikipedia
They prefer the Rum Line. (Rhumb)
Rhumb line - Wikipedia
Beam me up Scotty........Warp 2 Mr. Sulu
625-7
Member
I used polar to rectangular conversion to go to Myrtle Beach. Why you ask? To assimilate MC squared of fair maidens attempting to control a mechanized male bovine. Quite an affair I might say. Apparently an assortment of science and math nerds congregate to such events. Fort Sumpter was worth ride!
