USPS - dedicated to making boating safer and more fun 1 Section 7 Piloting – Plotting a Course Version /2006 United States Power Squadrons ® Boating Course >>

USPS - dedicated to making boating safer and more fun 2Definitions Navigation Navigation The science of moving a boat in a safe and efficient manner. The science of moving a boat in a safe and efficient manner. Piloting Piloting A part of navigation using landmarks, navigational aids, and soundings as primary tools. A part of navigation using landmarks, navigational aids, and soundings as primary tools. You will need a chart, a compass and plotting tools >>

USPS - dedicated to making boating safer and more fun 3 Rectangular Course Plotter Used throughout USPS courses 1.4 x 15 Transparent base 2.Parallel lines for alignment 3.Protractor scale for measurement >>

USPS - dedicated to making boating safer and more fun 4 Various Styles of Dividers >>

USPS - dedicated to making boating safer and more fun 5 A Chart Compass Rose A Chart Compass Rose Variation is found in the center of the compass rose >>

USPS - dedicated to making boating safer and more fun 6 Why Rules for Chart Work? Good habits will reduce errors Good habits will reduce errors Mistakes are easier to find Mistakes are easier to find Information is clear for future use Information is clear for future use Other boaters can follow your work Other boaters can follow your work You know you are in Safe Water You know you are in Safe Water >>

USPS - dedicated to making boating safer and more fun 7 Accuracy Standards Angle - Nearest Whole Degree º Angle - Nearest Whole Degree º Distance- Nearest 1/10 of a mile nm Distance- Nearest 1/10 of a mile nm Speed - Nearest 1/10 of a knot kn Speed - Nearest 1/10 of a knot kn Time- Nearest whole minute Time- Nearest whole minute >>

USPS - dedicated to making boating safer and more fun 8 Class Exercise On the Bowditch Bay chart, plot a course: On the Bowditch Bay chart, plot a course: From: G “ C 1 ” off Chapman Point From: G “ C 1 ” off Chapman Point To: RG “ D ” Gong on the upper right side of the chart To: RG “ D ” Gong on the upper right side of the chart Plot a Course: >>

USPS - dedicated to making boating safer and more fun 9 Bowditch Bay Practice Chart G C "1" RG "D" >>

USPS - dedicated to making boating safer and more fun 10 How To Draw A Course Line Using C "1" RG "D" Bowditch Bay Chart The Course Plotter >>

USPS - dedicated to making boating safer and more fun 11 Bowditch Bay Practice Chart Lay edge of the Course Plotter between the two nav aids 1 2 Using the Course Plotter as a straight edge, draw the course line >>

USPS - dedicated to making boating safer and more fun 12 How To Determine Course Heading Using The Course Plotter >> Two Methods Two Methods Using Plotter & Latitude grid lines Using Plotter & Latitude grid lines Using Plotter & Longitude grid lines Using Plotter & Longitude grid lines

USPS - dedicated to making boating safer and more fun 13 Plotting Tools >> Straight edge course line 000° 090° 180° 270°

USPS - dedicated to making boating safer and more fun 14 Using Longitude Grid Line >> Starting Waypoint Destination Waypoint Slide straight edge along course line align bulls-eye with grid line Read 067º on outer scales (scales read right to left)

USPS - dedicated to making boating safer and more fun 15 Using Latitude Grid Line >> Starting Waypoint Destination Waypoint Slide straight edge along course line align bulls-eye with grid line Read 157º / 337 º on outer scales (scales read right to left) Latitude Grid Line Yields Wrong Quadrant

USPS - dedicated to making boating safer and more fun 16 Using Latitude Grid Line >> Slide straight edge along course line align bulls-eye with grid line Read 140º / 320º on inner scales (scales read right to left) EXAMPLE 2 (new course) Latitude Grid Line Yields Proper Quadrant Starting Waypoint Destination Waypoint

USPS - dedicated to making boating safer and more fun 17 Labeling A Course Line Place the true course direction near the beginning of the course Course 067° true >> C "1" RG "D" C 067

USPS - dedicated to making boating safer and more fun 18 Bowditch Bay Practice Chart C067 >>

USPS - dedicated to making boating safer and more fun 19 Class Exercise Using Maptech’s Chart Navigator “A2B” function, determine the reciprocal course in the prior exercise. >>

USPS - dedicated to making boating safer and more fun 20 Determine the Course via Chart Navigator >> A B 1. Select A2B Tool2. Move cursor to 1st waypoint, click A 3. Move cursor to 2 nd waypoint, click B 4. Cursor over 1 st or 2 nd waypoint, right click Name: (date created or user assigned) Properties Delete Name: (date created or user assigned) Properties Delete 5. Click ‘Properties’

USPS - dedicated to making boating safer and more fun 21 Labeling A Course Line reciprocal Place the true course direction near the beginning of the course Course 247° true >> C "1" RG "D" C 247

USPS - dedicated to making boating safer and more fun 22 Bowditch Bay Practice Chart C247 >>

USPS - dedicated to making boating safer and more fun 23 Conclusion >> 1. Estimate the course (at least to 0-90, , etc). 2. Put a pencil or divider tip on one of the course points. 3. Bring the top edge of the plotter around so it goes between the two points. 4. Slide the plotter along the course line until the plotter bullseye is on a horizontal or vertical grid line. (Having the pencil or divider on one of the course points makes it easier to slide the plotter while keeping it aligned with the course line.) 5. Look at the four possible course readings, pick the one that fits your estimate of the course. (this, along with step 1, eliminates the need for remembering whether the inner graduations are for use with a meridian or parallel) 0º-090º 090º-180º 270º-360º 180º-270º

USPS - dedicated to making boating safer and more fun 24 END Section 7 United States Power Squadrons® Boating Course