Did you referance a tides and current book? It will tell you the speed and direction of the current which you can add or subtract as a vector to your course and speed. You have to compensate the tide and cutrent to your specific location which adds even more difficulty.
I kinda feel like it is a bit of an exercise in frustration though. Especially in a sailboat since any change in wind can have a significant change in VMG or course speed. Best use of the tide charts in my opinion is to ensure you are timing your trip with the current instead of against. It can make a huge difference. In fact many areas can expierience currents in excess of hull speed so despite your best efforts you will never make it to your destination. If tides and currents are strong in your area a rule of thumb is leave on high tide, return on low. 1-2 hours early doesn't hurt. Josh Muckley S/V Sea Hawk On Jan 6, 2014 1:23 PM, "Curtis" <cpt.b...@gmail.com> wrote: > So I'm as some of you know in the process of moving to the next step in my > training. I'm in the planing stages of my first over-night near shore > passage. I will leave early am: 4:00 with a full moon to help and head out > to the "R 4" F1 R4s @ 32-05,901"N 080-35,099W this is the channel into > Port Royal sound Beaufort SC. > I intend to sail out with the tide its a 19 mile ride I figure 5.5 knots > of speed? That will put me there at Day break or just after 3.45 hrs. > Then run straight east for 5nm to 32-029'899N 080-29'988 W That will take > a nother 90 min, > Here, I will turn south to 32-03,997W 080-29'167W 1.92 miles = 34min > Here i will turn back west to 32-03'984W 080-34'965w this 4.92 leg take > .89 min > Then I will turn North to will bring me the 4.92 nm back to to the "R 4" > F1 R4s @ 32-05,901"N 080-35,099W the bell marker at the mouth of the > channel. Then my hope will be to take the the Tide back in. > So here is the question." If I do this near shore how much will the tide > effect my timing in the course: I plugged in the 5.5 based off motor speed. > All together time from the dock and back to the dock. 10.956 hours to > cover 60.26nm > How much time will the tide cost me off shore? I know a bought the tide in > and out of the river. Just need help with the offshore expectation? > Thanks again. let me know if you need more information. > LT > > > > > > > -- > “Sailors, with their built in sense of order, service and discipline, > should really be running the world.” - Nicholas Monsarrat > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > >
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