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

2. 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

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

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

6. 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

7. Distance Measurement - "Walking" the Dividers

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

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

10. 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
= S x 40
S = 12.0 kn

11. 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

12. 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

13. 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
= 10 x T
T = 30 m

15. 24 - Hour Clock
1200
1400
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0100
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16. Calculating Time Arrive: 1612  1572 Depart: 1047 1047 ——— 0525
(5h 25m)
Elapsed Time:

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

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