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Has anyone tried moving the speedo to centerline |
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Pride of Waterford
Captain Joined: 31 December 2013 Location: chichester Status: Offline Points: 243 |
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What are you dumping?
I might be interested in recycling them on my boat. If you haven't dumped already please let me know what you have thats still working Many thanks Jon
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Brod Port Lairge
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jracoffman
Commander Joined: 12 March 2013 Location: Westport, CT Status: Offline Points: 135 |
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I haven't dumped anything and happy to discuss selling my old SIMRAD displays (6 IS20s, 3 of which are COMBIs), BR24 Radar, and NX40 chart plotter. As I was periodically having to replace IS20s, I noticed they are increasingly difficult to find... Feel free to PM me for more specifics and any offer you are willing to make.
James |
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James C
Gemini, Hanse 375 #644 USA 60468 |
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Pride of Waterford
Captain Joined: 31 December 2013 Location: chichester Status: Offline Points: 243 |
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2 combis and 2 of the 7 or 3 way simnet connectors and a couple of lengths of cable would be useful.
I have a NX40 in good condition but I have noticed there is still a market for those so you should be able to ebay that. Let me know approx price you want and We can organise paypal payment and shipping as a gift of no commercial value which would make customs easier here. All best jon
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Brod Port Lairge
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Johan Hackman
Admiral of the Fleet Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4262 |
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Why do you mean the calculation is wrong? Johan |
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iemand
Admiral Joined: 13 February 2004 Location: Germany Status: Offline Points: 1082 |
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Because the wind is blowing with 20kn
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Hanse 312 MJ 2004 - Hanse 370e MJ 2007
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Johan Hackman
Admiral of the Fleet Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4262 |
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I see what you mean. So here's my next "lesson":
I wrote previously that you must ask yourself in relation to WHAT the wind is blowing. In your example the wind is blowing 20 knots in relation to the ground. While on the river you will only experience 18 knots, because then the wind is blowing in relation to the water. If you change the parametres you will see what I mean. Take away all the land and put yourself in your boat on the ocean. You cannot even see land from where you are, only water. You have no idea what the wind across the nearest land is. There is a 10 knot Southerly wind and a 10 knot Northerly current, i.e. the wind blows in exactly the same speed and direction as the water is flowing. You will not have any wind at all while there will be a 10 knot wind across the nearest land. Standing on the shore will be windy but drifting in your boat will be windless. That's because one wind information is the wind across land and the other wind across water. Therefore 18 knots is correct as long as you want the wind across the water, and that is going to be the information you are looking for if you are sailing. Johan |
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jracoffman
Commander Joined: 12 March 2013 Location: Westport, CT Status: Offline Points: 135 |
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All good discussion here. Hadn't heard of the ultra sonic option, and may research that. Since I am racing extensively, AND in an area of heavy currents (Long Island Sound) having STW be very accurate on both tacks is important information for me. It can very up to a knot from one tack to the other. I am purchasing a 'shorty' thru-hull that only sticks up about 3 inches, so we will see if we can get it under the floorboard of the forward cabin on my 375 which has very little clearance. The other issue I am being told is that it needs to be 1-2 feet forward of the leading edge of the keel, so that may push me to put the speedo all the way to in front of the water tank. Will keep everyone posted.
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James C
Gemini, Hanse 375 #644 USA 60468 |
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Johan Hackman
Admiral of the Fleet Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4262 |
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James,
I just tried to reply to your post but I get a message that this forum is moderated. Johan |
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Johan Hackman
Admiral of the Fleet Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4262 |
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Ok, so I shall retry to write the post without upsetting the forum software.
All transducers are made by a company called Airmar. Maybe the fact that I posted a link to their site upset the software so I will ask you to Google it. You should check their product range and you will probably find a few ultrasonic speed sensors there. Johan |
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Johan Hackman
Admiral of the Fleet Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4262 |
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My sensor is a Maretron DST100 (depth, speed and temperature) but the user guide is identical to the guide for the Airmar DST800, which I believe is the "triducer" Hanse fits in their boats nowadays.
Johan Edited by Johan Hackman - 07 July 2017 at 14:18 |
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