CaptainCaveman
New member
I know its 4 knots but how fast have you gone on the river?
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Knots on river?
- Thread starter CaptainCaveman
- Start date
kazbaz2
New member
not sure if its right but im sure the rule is 1 nuetical mile per nuetical knot i.e. 1 mile= 1 knot?correct me if im wrong
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oldharry
Well-known member
1 knot = 1 nautical mile, of which there are 60 to a degree of latitude, which makes navigation nice and easy (well marginally easier anyway). but Nm's are not the same as statute miles, so 4 knots is roughly 5 mph
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MIKE_MCKIE
New member
NO IT IS NOT!!! SEMANTICS, BUT VERY IMPORTANT SEMANTICS.
One knot is one Nautical Mile per hour. It is a measure of speed, not a linear distance.
Yes a nautical mile is slightly longer than a statute mile, 6076 feet as against 5280, so one knot equals 6076/5280 miles per hour, ie 1.15075757575mph.
The term "knots per hour" so beloved of yotties is in fact an acceleration, somewhat akin to Newtons law of gravity of 32ft/per second/per second, ie one nautical mile/per hour/per hour. At a "speed" of say 10 knots per hour, you would break the sound barrier in about 3 days!
Disgruntled (for the xxx millionth time!!)
Master Mariner (FG)
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One knot is one Nautical Mile per hour. It is a measure of speed, not a linear distance.
Yes a nautical mile is slightly longer than a statute mile, 6076 feet as against 5280, so one knot equals 6076/5280 miles per hour, ie 1.15075757575mph.
The term "knots per hour" so beloved of yotties is in fact an acceleration, somewhat akin to Newtons law of gravity of 32ft/per second/per second, ie one nautical mile/per hour/per hour. At a "speed" of say 10 knots per hour, you would break the sound barrier in about 3 days!
Disgruntled (for the xxx millionth time!!)
Master Mariner (FG)
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ccscott49
Active member
I don't understand what you are getting at. What's a river got to do with it? A knot is 1 nautical mile per hour, it's a measure of speed, where does a river make any difference? Apart from maybe a speed limit.
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tome
New member
What on earth are you talking about????
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Seafort
New member
If I get your drift. /forums/images/icons/wink.gif
Find the flow rate and either add or subtract it to your log speed (with/against).
Failing that take along someone with a handhald GPS and check the SOG.
Dave.
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Find the flow rate and either add or subtract it to your log speed (with/against).
Failing that take along someone with a handhald GPS and check the SOG.
Dave.
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boatone
Well-known member
Isnt it a pity........
.....that peeps dont read the question properly ...../forums/images/icons/smile.gif
Im not telling how fast Ive done on the river but I do behave reasonably responsibly!
TonyR
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.....that peeps dont read the question properly ...../forums/images/icons/smile.gif
Im not telling how fast Ive done on the river but I do behave reasonably responsibly!
TonyR
<hr width=100% size=1><A target="_blank" HREF=http://www.boatsontheweb.com/galleryframes.html> BoatsOnTheWeb, Photo Gallery, Chat Room</A>
mike_kolling
N/A
Not as fast as others I could mention.
My favourite was when I was looking to buy another Princess 37, and the then owner proudly declared that he regulary went tonking up along Runneymede at 26knots and did I want a demo!
Thankfully for us all he sold it and its gone down the coast now.
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My favourite was when I was looking to buy another Princess 37, and the then owner proudly declared that he regulary went tonking up along Runneymede at 26knots and did I want a demo!
Thankfully for us all he sold it and its gone down the coast now.
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ccscott49
Active member
Re: Isnt it a pity........
Tony, would you mind explaining what he means, please? I can't make it out, sorry but I've read it six or seven times.
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Tony, would you mind explaining what he means, please? I can't make it out, sorry but I've read it six or seven times.
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oldharry
Well-known member
Re: Knots as speed
I thought that thats what I was saying.... in a nice easy way to understand.
But a knot is the same speed whether on land sea, air or river - so where DOES the river come in to the questioners question?
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I thought that thats what I was saying.... in a nice easy way to understand.
But a knot is the same speed whether on land sea, air or river - so where DOES the river come in to the questioners question?
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ccscott49
Active member
Re: Knots as speed
I'm still at a loss myself, but boatone, seems to think I didn't read the question???
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I'm still at a loss myself, but boatone, seems to think I didn't read the question???
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BrendanS
Well-known member
Re: Knots as speed
4knts = speed limit on river (not the same everywhere of course)
How fast = what top speed actually attained on river
I've known few people on non-tidal Thames who have opened up and been in excess of 40knts after a few evening drinks on way back from pub.
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4knts = speed limit on river (not the same everywhere of course)
How fast = what top speed actually attained on river
I've known few people on non-tidal Thames who have opened up and been in excess of 40knts after a few evening drinks on way back from pub.
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Neal
New member
I mainly agree with you Mike ...
particularly from a philological and etymological perspective (what me, full of bullshit?). Howver, I believe the great Captain Bligh uses the term 'knots per hour' in the log of HMS Bounty.
Has the meaning changed over the years, or was Bligh being careless?
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particularly from a philological and etymological perspective (what me, full of bullshit?). Howver, I believe the great Captain Bligh uses the term 'knots per hour' in the log of HMS Bounty.
Has the meaning changed over the years, or was Bligh being careless?
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boatmad2
New member
Re: I mainly agree with you Mike ...
We once went to a certain river to test a rebuilt outboard. The man in the office said its water skiing day but there is nobody here today sure go ahead give it a good blast if you want. Phantom 17 plus race tuned 150 Yamaha 70mph plus and im not saying how much plus, no names no packdrill.
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We once went to a certain river to test a rebuilt outboard. The man in the office said its water skiing day but there is nobody here today sure go ahead give it a good blast if you want. Phantom 17 plus race tuned 150 Yamaha 70mph plus and im not saying how much plus, no names no packdrill.
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