Piloting - Plotting a Course Welcome to the United States Power Squadrons' Chart Smart Seminar Piloting - Plotting a Course (Section 5)

Section 5: Piloting - Plotting a Course Class Agenda - cont'd Section 5: Piloting - Plotting a Course Navigation vs Piloting Accuracy Standards Plotting Tools Hands-on Practice

You will need a chart, a compass and plotting tools Definitions Navigation The science of directing the movements of a boat from one place to another in a safe and efficient manner. Piloting A part of navigation using landmarks, navigational aids, and soundings as primary tools. You will need a chart, a compass and plotting tools

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Why Rules for Chart Work? Good habits will reduce errors Mistakes are easier to find Information is clear for future use Other boaters can follow your work To know you are in Safe Water

Accuracy Standards Angular Measurement - Nearest Whole Degree - 214 º (with three digits)   Distance - Nearest one-tenth of a mile - 6.5 nm Speed - Nearest one-tenth of a knot - 4.3 kn Time - Nearest whole minute - 43 m

How To Draw A Course Line Using The Course Plotter RG "D" C "1" Bowditch Bay Chart

RG "D" C "1"

DRAW THE COURSE LINE USING THE QUIK COURSE PLOTTER AS A STRAIGHT EDGE

Place Center at Beginning of Course

Determine the Course 1 2 3 Read: 067 Plot the course Once we have identified the starting and ending points, we need to draw a course line. You can use the course plotter as a straightedge to do that. Next, you will want to know the Course angle. You place the center of the course plotter over the starting point and align it with the grid lines on the chart. Then, you read the course angle on the scale as shown. IN this case, the course will be 067 degrees. 1 Plot the course 2 Check it for safe passage 3 Measure the course direction (true)

Labeling A Course Line C 067 Course 067° true Place the true course direction near the beginning of the course

C067

Class Exercise #4 On the Bowditch Bay practice chart, determine and label the reciprocal course in Exercise #3. Update Variation to the current year. Determine magnetic and compass courses.

Labeling A Course Line C 247 067 180 247 Course 247° True reciprocal Place the true course direction near the beginning of the course

C247

The TVMDC Formula True Course T _247°_ Variation V _15°W_ Add Add East West Magnetic Course M _262°_ Subtract Subtract West East Deviation D _0°_ Compass Course C _262°_ Deviation is assumed to be 0 ° for demonstration only

Piloting - Plotting a Course End of Section 5 Piloting - Plotting a Course