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#1
posted to rec.boats.cruising
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Haversine Calculator
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#2
posted to rec.boats.cruising
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Haversine Calculator
On Thu, 09 Oct 2008 23:13:16 -0400, Wayne.B
wrote: On Fri, 10 Oct 2008 01:56:42 GMT, (Richard Casady) wrote: You can't possibly think the difference between a 6 mi long rhumb line and a great circle is of any significant. It makes a big difference on 3,000 mile east/west passages however, especially in higher latitudes. That is the extreme case where following the GC is of the most benefit. Thirty five years ago I had a HP calculator that took magnetic cards. I had the Nav pack and it would give the distance and heading between two points. I think it would split it up into waypoints for a better approximation. Casady |
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#3
posted to rec.boats.cruising
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Haversine Calculator
Richard Casady wrote:
On Thu, 09 Oct 2008 23:13:16 -0400, Wayne.B wrote: On Fri, 10 Oct 2008 01:56:42 GMT, (Richard Casady) wrote: You can't possibly think the difference between a 6 mi long rhumb line and a great circle is of any significant. It makes a big difference on 3,000 mile east/west passages however, especially in higher latitudes. That is the extreme case where following the GC is of the most benefit. Thirty five years ago I had a HP calculator that took magnetic cards. I had the Nav pack and it would give the distance and heading between two points. I think it would split it up into waypoints for a better approximation. Amazing how far technology has come. I've got a hand held GPS that will calculate GCs and give you a constantly changing course to steer while following them. I'll bet I could buy about 10 of them for what you paid for your HP, (corrected to todays dollar or course). Cheers Martin Casady |
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#4
posted to rec.boats.cruising
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Haversine Calculator
On Fri, 10 Oct 2008 15:43:25 -0400, Marty wrote:
Richard Casady wrote: On Thu, 09 Oct 2008 23:13:16 -0400, Wayne.B wrote: On Fri, 10 Oct 2008 01:56:42 GMT, (Richard Casady) wrote: You can't possibly think the difference between a 6 mi long rhumb line and a great circle is of any significant. It makes a big difference on 3,000 mile east/west passages however, especially in higher latitudes. That is the extreme case where following the GC is of the most benefit. Thirty five years ago I had a HP calculator that took magnetic cards. I had the Nav pack and it would give the distance and heading between two points. I think it would split it up into waypoints for a better approximation. Amazing how far technology has come. I've got a hand held GPS that will calculate GCs and give you a constantly changing course to steer while following them. I'll bet I could buy about 10 of them for what you paid for your HP, (corrected to todays dollar or course). $800 when gas was 30 cents or so. Casady |
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