For us to work out the course to steer we must draw a triangle, each side of which represents the same period of time. So our next step is to measure off the distance we expect the boat to travel through the water in 1 hour. In this case 5M.
If you want a course to steer for several hours, just add each hour of tide: For a cross channel passage you can find the net tide for 12 hours, see here: Tide_planning_course_to_steer.pdf
So you steer of 12º off. It is an approximation (except for 30 mins/0.5 which is exact) but it is a very good one from dead ahead 0º all the way round to 45º. If you’re on deck, calculating course to steer corrections in your head can be extremely useful.
One method requires you to divide 60 by your boat speed, and then multiply this by the rate of tide in order to calculate a course to steer. This is correct of course, but how to do this easily?
Designated by 1 arrow (mnemonic “water has one”). I measured this direction which is 118 deg T. This is the CTS (Course to Steer). It means if your boat heading is 118 T then your ground track will be from the eFix position towards point C AND towards the Buoy RW “NH” since it lies on the same line.
4:479:22Course to Steer Per Standard Magnetic Compass - YouTubeYouTubeStart of suggested clipEnd of suggested clipThree one three plus nine gives us three two - three - two would be what the true direction is basedMoreThree one three plus nine gives us three two - three - two would be what the true direction is based on magnetic north.
With your straight edge, draw a line from the last fix to the end of the set/drift line. Measure the angle of this line against the compass rose to get the Course Over Ground. The Speed over Ground is also the length of the line, if the measured time was an hour.
0:551:39How to Determine Sailing Leeway - YouTubeYouTubeStart of suggested clipEnd of suggested clipWe can determine leeway angle by using a simple technique with a hand bearing compass. We stand in aMoreWe can determine leeway angle by using a simple technique with a hand bearing compass. We stand in a cockpit facing the wheel or tiller sight. Through the back state dead astern.
Now the fix is simple: in order to get the true heading correct, we must subtract the value of the leeway with his sign. Let's take an example. If we sail with a true heading of 50 degrees and a leeway of 10 degrees on the starboard, then tack to the left, we have to apply the formula Pv= Rv – ( +/- leeway).
0:115:57Speed over Ground (SOG) & Speed over water (SOW)/STW ExplainedYouTubeStart of suggested clipEnd of suggested clipSince you are having a favorable effect of two knots. You will be having a speed over groundMoreSince you are having a favorable effect of two knots. You will be having a speed over ground remember speed over ground is the gps speed of 14 knots. And speed over water will remain 12 knots.
What is the definition of course to steer? A course to steer is roughly defined as the estimated course that a boat should steer in order to arrive at a specific waypoint, taking into consideration the effects that wind and tide will have on the vessel.
Leeway is the amount of drift motion to leeward of an object floating in the water caused by the component of the wind vector that is perpendicular to the object's forward motion.
The relationship between ship's track direction and true course mainly depends on the combined action of the leeway and drift angle γ:γ=α+β, and the positive and negative wind-current pressure difference depends on the result of the combined action of the leeway and drift angle.
Leeway increases as boat speed decreases. On a vessel that can make 30 knots, leeway will be minimal and for practical purposes can normally be ignored.
Noun. estimated position (plural estimated positions) (navigation) An estimate of the position of a ship or aircraft at a certain time, worked out by adding the estimated effect of the tide and wind to the dead reckoning.
Course to Steer (CTS) is the required heading of the yacht to achieve an intended COG. The true course must be corrected for leeway, variation and deviation to find the compass course to use at the helm → CTS.