A knock in terms of speed on a ship and a mile in terms of speed on a car. What is the differencs. A miles is 5,280 feet, what is a knock?
2006-08-30 10:14:49 · 11 answers · asked by forneylloyd 1 in Cars & Transportation ➔ Boats & Boating
KNOT
2006-08-30 10:17:29 · answer #1 · answered by Anonymous · 0⤊ 0⤋
What is a knot? What is a nautical mile?
Knots and Nautical miles are good old navy terms. The nautical mile was based on the circumference of the earth at the equator. Since the earth is 360 degrees of longitude around, and degrees are broken into 60 so-called "minutes", that means there are 360 * 60 = 21,600 "minutes" of longitude around the earth. This was taken as the basis for the nautical mile; thus, by definition, 1 minute of longitude at the equator is equal to 1 nautical mile. So the earth is ideally, by definition, 21,600 nautical miles (and 21,600 "minutes" of longitude) in circumference at the equator. If anyone ever asks you how far is it around the earth, you can quickly do the math in your head (360 degrees * 60 minutes per degree) and answer "about 21,600 nautical miles!"
2006-08-30 18:37:07 · answer #2 · answered by fobishi 1 · 0⤊ 0⤋
When navigation was new on sailing ships, some way to determine speed over water was needed in order to compute distance traveled on a map.
What was developed was a rope or line with a knot tied in it a regular intervals, usually a fathom (6ft. US). The line was tied to a log and the log tossed overboard. As the ship moved away from the log, the navigator counted the knots as they moved through his hand and his assitant noted the time required from knot to knot on a timepiece called a chronograph. It only took a short time to determine the speed of the ship; example: 3 knots in a 15 minute period = 12 knots in 1 hour.
This distance was transferred to the chart and the position was guessed at or "Dead Reckoned".
The length of the knot was arbitrary to the country of the particular ship and was not standardised until the 1800's.
Some knots might be 5 fathoms in length or any number.
Distance is not measured in knots, so comparing knots to miles is not feasable.
Land vehicles travel at miles per hour (or metric; kilometers per hour) and ships and planes travel at knots of speed.
2006-08-30 17:28:16 · answer #3 · answered by John G 2 · 3⤊ 0⤋
A KNOT is a speed measurement of 1 nautical mile per hour. A nautical mile is equal to a minute of latitude or a division of the earths circumference. A degree of latitude is 60 miles.A nautical mile is 1.18 statute miles.(now multiply by 5280)
2006-09-01 11:48:16 · answer #4 · answered by science teacher 7 · 0⤊ 0⤋
johnagwinn hit the nail on the head. One other point to note: The fathom was around 6 feet because the sailors streched out their arms to length for that. A six foot tall man has an arm reach of 6 feet.
2006-08-31 02:36:06 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Knots are nautical miles per hour. There are 6000 feet in a nautical mile versus 5280 feet in a statute mile (the mile your car uses on it's odometer) on average a knot is 1.1 statute miles per hour (MPH)
2006-08-30 17:21:23 · answer #6 · answered by Dave D 2 · 0⤊ 0⤋
1 nautical mile or knot os equivalent to 1.16 miles, it is also equivalent to 1 minute of 1 degree lattitude, this aids directly when charting a course, not all charts show the equator so you can use the lattitude as a scale for nautical miles,
2006-08-31 01:53:12 · answer #7 · answered by Lawrence H 2 · 0⤊ 0⤋
Knock? Do you mean knot?
One knot is 6,076.12 feet. So that places it just over one land mile.
2006-08-30 17:18:54 · answer #8 · answered by Oklahoman 6 · 0⤊ 0⤋
It's "knot", not "knock"... it's an abbreviated way of saying "nautical mile", which is 1.16 miles, IIRC.
2006-08-30 17:18:51 · answer #9 · answered by darqueness42 1 · 0⤊ 0⤋
yup
2006-08-30 18:31:57 · answer #10 · answered by jyd9999 6 · 0⤊ 0⤋