Piloting - Distance, Speed, Time Welcome to the United States Power Squadrons' Chart Smart Seminar Piloting - Distance, Speed, Time (Section 6)

Section 5: Piloting - Distance, Speed, Time Class Agenda - cont'd Section 5: Piloting - Distance, Speed, Time The DST Formula Alternative Method of Using 60D=ST

THE 60 x D = S x T FORMULA D = Distance (in nautical miles - nm) S = Speed (in knots - kn) T = Time (in minutes - m)

Alternative Method of Using the 60 x D = S x T Formula

Calculating Distance Formula: 60 x D = S x T 60 x D = 10 x 30 How far will your boat go if you run at 10 knots for 30 minutes? Formula: 60 x D = S x T 60 x D = 10 x 30 60 x D = 300 D = 5.0 nm

Distance Measurement - "Walking" the Dividers

Labeling a Course Line For Distance Course 067° true Distance to next objective 11.2 nautical miles

Labeling a Course Line For Distance Course 247° true (reciprocal of 067°) Distance to next objective 11.2 nautical miles

Calculating Speed What was your boat speed if it took you 40 minutes to run 8 nautical miles? Formula: 60 x D = S x T 60 x 8 = S x 40 480 = S x 40 S = 12.0 kn

Labeling a Course Line For Speed Course 067° true, Speed 12.0 kn Speed is placed beneath the course line and near the beginning of the course

Labeling a Course Line For Speed Course 247° true (reciprocal of 067°) Speed is placed beneath the course line and near the beginning of the course

Calculating Time How long will it take you to go 5 nautical miles at 10 knots? Formula: 60 x D = S x T 60 x 5 = 10 x T 300 = 10 x T T = 30 m

24 - Hour Clock 1200 1400 1300 1500 1600 2300 2200 2100 2000 1800 1900 1700 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 1100 2400 0000

Calculating Time Arrive: 1612  1572 Depart: 1047 1047 ——— 0525 (5h 25m) Elapsed Time:

Calculating Time Depart: 2200 Elapsed Time: 1030 ——— Arrive: 3230 - 2400  0830 (next day)

Piloting - Distance, Speed, Time End of Section 6 Piloting - Distance, Speed, Time