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Topic: Knot (speed)

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True airspeed

Knot

Log (speed)

Airspeed indicator

Miles per hour

Nautical mile

Speed

Calibrated airspeed

Equivalent airspeed

Airspeed

Kilometres per hour

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	Knot (speed) - Wikipedia, the free encyclopedia
		A knot is a unit of speed, abbreviated kt or kn.
		By convention, knots measures the speed of the vessel relative to the fluid itself and not land.
		Because a knot is defined as a nautical mile/hour, the expression "knots per hour" is considered incorrect as a unit of speed, since this suggests (nautical mile/hour²), which would be a measure of acceleration.
	en.wikipedia.org /wiki/Knot_(speed) (409 words)

	Knot
		In navigation, a knot is a unit of speed: one knot is one nautical mile per hour = 1.852 km/h = 0.514 m/s.
		Knots have been the subject of interest both for their ancient origins, common use or their mathematical implications, see knot theory.
		For example, loop knots share the attribute of having some kind of an anchor point constructed on the standing end (such as a loop or overhand knot) into which the working end is easily hitched to using a round turn[?]).
	www.ebroadcast.com.au /lookup/encyclopedia/bi/Bight.html (909 words)

	[No title]
		The speed ratio for strength of ebb is 0.8, except for an ebb speed at Tampa Bay entrance less than 1 knot or marked with an asterisk.
		It is reported that ebb currents on the north side of the bar attain speeds of 6 to 8 knots and that strong NW winds sometimes cause currents that set north in the area outside the jetties.
		Speed ratios are for greater flood and greater ebb.
	www.co-ops.nos.noaa.gov /currents04/currnote.html (3697 words)

	Knot (disambiguation) - Wikipedia, the free encyclopedia
		knot (mathematics), an abstract representation of an interwoven linear object
		knot (speed), a unit of water or air speed ideally equaling 1 nautical mile per hour, depending on the relative motion of the medium
		knot (wood), a mark left in timber by the origin of branches; the knot's grain travels in a different direction to the trunk of the tree
	en.wikipedia.org /wiki/Knots (263 words)

	Glacier Bay National Park & Preserve - News (Site not responding. Last check: 2007-11-02)
		Superintendent Tomie Lee announced a special 10 knot speed limit today for vessels traveling in Whidbey Passage whale waters to protect humpback whales that have been sighted in the area.
		If accidentally positioned within one quarter mile of a whale, vessel operators must slow immediately to 10 knots or less and steer the vessel on a steady course away from the whale (perpendicular to the whale’s course) until their vessel is at least one quarter mile from the whale.
		Speed and course restrictions in whale waters are intended to reduce the interruption of feeding whales and to lower the risk of whale/vessel collisions.
	www.nps.gov /glba/pphtml/newsdetail13836.html (485 words)

	Online Conversion - What is a "Knot"
		The number of knots in the rope that were counted in 30 seconds was then equal to the speed of the ship in nautical miles per hour.
		A "knot", therefore, is not a nautical mile; it is a nautical mile per hour.
		Thus 1 knot was equivalent to 1 nautical mile per hour; 5 knots were equivalent to 5 nautical miles per hour; etc. The similar sound of "knot" and "naut" is entirely coincidental.
	www.onlineconversion.com /forum/forum_1076731782.htm (1542 words)

	Math Forum - Ask Dr. Math
		Therefore the knot was the natural unit for measuring speed at sea.
		The rope had knots in it, and a sailor would count the knots that passed through his hands in a certain amount of time.
		The book in which speed (measured by heaving the log) and position were recorded was called the ship's log, so there are at least two terms that came from this practice.
	mathforum.org /library/drmath/view/58422.html (231 words)

	Knots versus Miles per Hour
		Both miles per hour and knots is a speed which is the number of units of distance that is covered for a certain amount of time.
		In aerodynamics, speed is also measured by the Mach number, which is the ratio of the speed of the object to the speed of sound.
		Since the speed of sound varies with the density of air (or whatever material it is transmitted through), one needs to determine the density of the air the aircraft is flying through.
	www.grc.nasa.gov /WWW/K-12/WindTunnel/Activities/knots_vs_mph.html (318 words)

	[No title]
		It is the pilot's responsibility and prerogative to refuse speed adjustment that he/she considers excessive or contrary to the aircraft's operating specifications.
		A speed not less than 210 knots; except when the aircraft is within 20 flying miles of the runway threshold of the airport of intended landing, a speed not less than 170 knots.
		A speed not less than 200 knots; except when the aircraft is within 20 flying miles of the runway threshold of the airport of intended landing, a speed not less than 150 knots.
	www.faa.gov /ATpubs/ATC/Chp5/atc0507.html (893 words)

	The Mavens' Word of the Day (Site not responding. Last check: 2007-11-02)
		One knot is a rate of speed equivalent to one nautical mile per hour, so it is proper to say that you're going eleven knots, for example.
		The use of knot to mean 'a nautical mile', as in "eleven knots per hour," is regarded as incorrect.
		The number of knots that would run out in 30 seconds (as measured by an hourglass) was equivalent to the speed in nautical miles an hour.
	www.randomhouse.com /wotd/index.pperl?date=19980505 (193 words)

	Regulations Changes for 2000 Boating Season
		The Department will establish a 6 knot speed limit in the vicinity of the Friendship Landing Launching ramp and a 25 knot speed limit starting above the ramp area to the headwaters of the Creek.
		The channel area is approximately 1500 ft in length and is confined with rock jetties and wood bulkhead on both sides.
		The Department will establish a 6 knot speed limit for all times from the jetty entrance to headwaters of the marina cove.
	www.dnr.state.md.us /boating/regschgs.html (742 words)

	Aerospaceweb.org \| Ask Us - Knots and the Nautical Mile
		The dictionary defines a knot as a unit of speed equal to one nautical mile per hour, where a nautical mile is 6,076.12 ft (1,852 m) in length.
		Of course, that error estimate assumes that the wood panel remains in the position where it was dropped and the rope does not stretch, both of which are probably not the case.
		Since the nautical mile and the knot are some of the fundamental cornerstones of navigation at sea, it is natural that they transferred to aviation as well.
	www.aerospaceweb.org /question/history/q0139.shtml (1239 words)

	Peter Suber, "Knot So Fast"
		When a knot is completed, knotters may drop it in any way at all in moving to the next cord and the next knot.
		Don't allow the last gesture on knot A to be the first gesture on knot B. We might restate this rule to allow knotters simultaneously to drop the cord for knot A with their left hand and pick up the new cord for knot B with their right.
		For example, one of my speed-methods for tying a square knot sometimes results in a cow hitch, which is topologically equivalent.
	www.earlham.edu /~peters/writing/knotfast.htm (1665 words)

	Submarine Underwater Log Systems - Chapter 7
		At 10 knots, 0.05 knot is 0.5 percent, 0.1 knot is 1 percent.
		If the master speed indicator indications do not agree with the calculated speed, the error is either due to the 3Y constant frequency supply not being exactly 60 cycles, or to the master speed indicator not being in exact calibration.
		For example: The speed reading may be 10.05 when the orifice is on zero, and should be 10.25 for +2 percent, and 10.45 for +4 percent, and 10.65 for +6 percent.
	www.maritime.org /fleetsub/log/chap7.htm (2540 words)

	Actions Taken on the 2003 Proposals
		The area is multi-use with skiing, tubing, anchoring, etc. The complaints have been significantly reduced this year and it is believed that this is due to increased patrols and a police presence being seen in the area.
		The Department should work with the boaters at the small marina to be sure there is optimum placement of the two ‘responsible for your wake’ buoys and increase the patrols to the area on weekends.
		During the boating season, there is a 35 daytime and 25 nighttime speed limit during the weekdays.
	www.dnr.state.md.us /boating/2003actions.html (928 words)

	Quarterly research reports for RACE Division of the Alaska Fisheries Science Ctr. for Jan-March 2000 (Site not responding. Last check: 2007-11-02)
		Door collapse occurred at several of the 2.0 knot speed increments as evidenced by a rapid decline in wing spread suggesting that the lowest STWs used in the experiment were at the operational limit of the trawl.
		However, at speeds greater than 4.5 knots the predicted distances off bottom are likely underestimated because the tilt meter was often observed losing contact with the bottom, and in many cases the bottom could no longer be seen.
		A study aimed at quantifying the escapement underneath the trawl at varying trawl speeds using an underbag is scheduled for this summer.
	www.afsc.noaa.gov /Quarterly/jfm2000/rptRACE_jfm00.htm (1957 words)

	Wind Speed
		One knot (1 nautical mile per hour) is equal to 1.15 miles per hour so for forecasting purposes, a knot and a mile/hour can be used interchangeably.
		For this class, a value within + or - 5 knots of the reported wind speed is considered "correct".
		On weather maps, the wind speed at a station is reported by a circle with a barb extending from it.
	geology.wcupa.edu /weather/forecast/discuss12.html (190 words)

	SpeedSailing FAQ
		Curiously, with the very high speeds now sailed, it is possible to sail an entire 500 meter run on a single gust of wind (at 45+ knots, a boat trasverses 500 meters in less than 22 seconds.
		Crossbow II regularly "pegged" her on-board knotmeter at 40 knots, yet her fastest measured speed was 36.
		Thus, a sailor who has been radar-timed at, say, 35 knots should be aware he or she has a ways to go before hitting the "big time" in world-class speed sailing.
	www.dcss.org /speedweek/FAQs.html (3473 words)

	Section 7 (Site not responding. Last check: 2007-11-02)
		It is the pilot's responsibility and prerogative to refuse speed adjustment that he considers excessive or contrary to the aircraft's operating specifications.
		Turbojet aircraft- A speed not less than 210 knots; except when the aircraft is within 20 flying miles of the runway threshold of the airport of intended landing, a speed not less than 170 knots.
		Reciprocating engine and turboprop aircraft- A speed not less than 200 knots; except when the aircraft is within 20 flying miles of the runway threshold of the airport of intended landing, a speed not less than 150 knots.
	www.peterson.af.mil /21sw/thuleatc/Pubs/7110_65/0507.htm (877 words)

	RMS Caronia II Timeline - Glossary Page 3 (Site not responding. Last check: 2007-11-02)
		In the United States the nautical mile is defined to be one-sixtieth part of the length of a degree on a great circle of a sphere whose surface is equal in area, to the area of the surface of the earth.
		A knot is not a measure of distance but a measure of speed, and the only measure of speed in the English language.
		When speaking of a vessel that travels, say 20 knots, we mean that the vessel is travelling at a speed of 20 nautical miles per hour; but the distance covered may be one nautical mile or a thousand, depending upon the length of time during which the 20-knot speed is maintained.
	www.caronia2.info /gloss03.htm (675 words)

	TTU Submariners @ WSI! (Site not responding. Last check: 2007-11-02)
		The 6.7 knot speed set last Saturday was by a sub with 20 percent less mass than Torpedo III, meaning that speed will be tough for TTU to beat.
		Using computer modeling, however, the students were able to determine that high 6 knot speeds are possible for their boat IF propulser John Gore is able to achieve a.75 to 1 horsepower output for 15 or more seconds.
		With news of the 6.7 knot speed arriving over the weekend and their scheduled competition today, the students had no time to construct new blades.
	www.tntech.edu /publicaffairs/rel/sub.html (1879 words)

	The Ocean Channel > How is speed measured on the water?
		One knot is equal to one nautical mile per hour.
		"The word "knot" originated long ago when sailing ships carried a speed-measuring device called a 'log chip and line:' A log attached to a rope was heaved overboard attached to a line that contained knots spaced at intervals of 47 feet, 3 inches (14.4 meters).
		As the login the water pulled on the rope and the rope was continually let out, the speed was calculated as the number of knots were counted in a standardized time interval of 28 seconds.
	www.ocean.com /resource.asp?resourceid=1204&catid=10 (292 words)

	Different types of knots
		A knot is also a unit of speed in aviation and marine navigation equal to one nautical mile per hour.
		Halyard knot: interlacing of ropes used to attach the halyard to a sail.
		Figure of eight knot: interlacing of ropes used to finish the end of a rope.
	www.infovisual.info /05/077_en.html (142 words)

	Manual for Expendable Radio Sono-Buoy Training Records (Site not responding. Last check: 2007-11-02)
		In the last example on this record, the speed of the DE is 10 knots, which is the usual speed for an ahead thrown attack.
		If the DE were making a 15 knot speed as in a conventional depth charge attack, the submarine signal would have been more completely masked by the sounds from the DE.
		In both cases the submarine is at periscope depth, and at a speed of 6 knots.
	www.hnsa.org /sound/sonobuoyman (6213 words)

	FR Doc 05-7894
		The existing speed limit did not address the needs of floatplane traffic, may have unnecessarily slowed the transits of smaller vessels, and did not apply in the northern portions of Tongass Narrows where traffic congestion and wake from larger vessels had become a concern.
		Two comments were received that favored extending the northern boundary of the seven-knot speed zone northward to Channel Island as a way to control wake damage to private and commercial property caused by large vessels transiting this area.
		The consensus expressed was that if the 7-knot speed limit were seasonal, the risk on the waterway would not be reduced in the [[Page 20473]] off months and the amount of wake damage to private and commercial property on Tongass Narrows would most likely increase.
	a257.g.akamaitech.net /7/257/2422/01jan20051800/edocket.access.gpo.gov/2005/05-7894.htm (2159 words)

	Tips on tying knots and tying the Shelton speed knot.
		The Shelton speed knot is perfect for tying all of your fishing needs and is great with ropes.
		The double San Diego jam knot is the only knot I have seen that if a good tier takes their time to ty it is perhaps a tiny bit stronger, but much more complicated to ty.
		This knot is simular to a clinch knot in strength.
	www.sheltonproducts.com /tipsonknots.html (960 words)

	Hydra
		This results in either increased towing speed or reduced fuel consumption because the horsepower required to tow at the same speed decreases.
		Gruzling explains that the loss of control in shallow waters comes from a bottom effect, when the stern rake is too steep relative to the depth of water and the water separates from the rake, so the skegs do not have enough flow over them to create the lift required to stabilize the barge.
		The lack of directional stability at slow speeds was a problem with the first generation of skegs resulting from how they were configured to come back on course after encountering a disturbance.
	www.nautican.com /hydra.htm (1430 words)

	Hunt 90 - Epoxy Construction
		Outlining seemingly contradictory goals, he wanted a large, luxurious motoryacht capable of a 28-knot top speed that would also be suitable for extended-range cruising.
		Through the early design process, the yacht’s length was increased several times until, at 90 feet, she was deemed big enough: four staterooms and a spacious galley in the lower deck, wide-open saloon and dining area on the main deck, and a big pilothouse and seating area on the flying bridge.
		Despite the greatly increased size, the owner maintained his requirement for a 28-knot top speed with a 25-knot cruise, to go island-hopping in areas like the Bahamas and the Caribbean.
	www.powerandmotoryacht.com /features/0903hunt (594 words)

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