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Before ships had instrumentation to determine their speed, sailors needed some way to estimate their speed and thus determine how far they had travelled for navigation purposes. Since the only useful point of reference was the sea itself, they would drop a 'chip log' into the sea. The chip log was a wooden panel attached to a line. The panel was weighted at one end so that it would float perpendicular to the surface of the sea and thus create drag. The line was knotted every 567 inches (47'3") and the number of knots that passed through the sailor's hand during a 30-second period (determined by a sand-glass) determined the speed the craft was sailing relative to the sea surface. One knot would therefore be equivalent to 1.85166 kph. Today, we use a 28-second period which equates to 1.852 kph.
The "knot" indicated speed was standardized to be equal to a nautical mile per hour, which matched the ship's speed with its position when not in a moving current.
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What is the speed in meters per second of a ship traveling at twenty knots?
10.2888888 is the speed in meters per second of a ship traveling at 20 knots.
How long will it take you to travel 58 nautical miles?
That's going to have a definite connection with the speed at which you travel. Here are a few examples: Speed = 1 knot. Time for 58 nm = 58hours Speed = 5 knots. Time = 11hours 36minutes Speed = 10 knots. Time = 5hours 48minutes Speed = 100 knots. Time = 34minutes 48seconds
What is the rotation speed of a bombardier Learjet 45?
120 knots
How many knots equals 1 mile?
There's no sensible answer to this. Knots is a measurement of speed, and speed is distance over time. Mile is just distance.You'd have to sat something like what speed in MPH is equal to one knot.
What is the average speed of a jet plane?
The average speed of a jet plane is about 900 kilometers per hour. However, this is usually measured in knots which refers to nautical miles and this translates to about 500 knots.
What unit speed is used to measure the speed of ships?
The nautical term for a unit of speed when sailing or navigating a boat is the word knots. To measure a knot it is the unit of speed equal to one nautical mile approximately 1.151 mph.
Why is it incorrect to use the term 'knots per hour'?
Because 'knots' is a speed or velocity and does not require a time unit added. It means nautical miles per hour.
Where did the use of the term knots to measure the speed of a ship originate?
It originated in reference to the knots sailors tied in the rope used to measure the distance a ship travled. E2020's answer
How fast is the speed of sound in knots?
The speed of sound measured at sea level is 661.47 knots.
Why is ship's speed measure in 'knots'?
The term comes from the way people measured the speed that the boat was traveling at. They would have a slender rope with knots on at regular intervals, and something to create drag at the end. Then they'd throw the rope overboard and count the number of knots that were pulled out in a certain amount of time.
What is the term for water speed?
The speed of water flow is the current. The speed of vessels traveling over water may be measured in 'knots" (meaning nautical miles per hour).
Average speed of a granny mobile?
The average speed for a granny mobile is averaged at about 7.6 knots. The max speed is 12.3 knots.
A sail boat broke a speed record by traveling at an average speed of 44.5 knots over 500 metersWhat is the average rate of speed in knots per meter?
.089 knots per meter or 11.23 meters per knots
What is RMS Queen Mary's Top Speed?
When Normal Cruises, it has a top speed of 28.5 Knots but when it regained the blue riband of the atlantic , it reached 29.64 knots, 30 knots and 31.69 Knots
What is an airplane speed?
knots
What is the cruising speed of a airbus a319?
Max cruising speed is 487 knots, economy(most efficient) cruising speed is 454 knots.
A speed boat moves at 35 knots and an auto moves at 35 statute miles per hour convert the speed boat's velocity to statute miles per hour and the auto velocity to knots?
35 knots = 40.28 mph 35 mph = 30.41 knots
