16. Terms Used in Current Sailing Track (TR) Speed of Advance (SOA) Course (C) Speed (S)
17. Terms Used in Current Sailing Set (S) Drift (D) Course Made Good (CMG) Speed Made Good (SMG)
18. Present DR Position Previous Fix Position Course & Speed Vector Set & Drift Vector Present Fix Position CMG & SMG Vector Actual Current Triangle
19. Future DR Position Previous Fix Position Course & Speed Vector Anticipated or Expected Current Vector Estimated Position at Future Time Track & SOA Vector Estimated Current Triangle
20. 0700 Fix Position Computing Set & Drift 0730 DR Position Course & Speed Vector 0730 Fix Position CMG & SMG Vector c - 090 T s - 12 kts Actual Current Direction Set & Drift Vector Set = 190 T Drift = 2 kts Distance = 1 NM
21. Example Given the course and speed of the ship, and the estimated set and drift, find the anticipated track and the anticipated SOA. C - 090 T S - 12 knots D - 225 T S (set) - 3 knots
22. Example (TR - 102 T) (S - 10.1 kts) c - 090 T s - 12 kts Set - 225 T Drift - 3 kts
23. Example Given the set and drift of the estimated current is 045 T at 3 knots, and the desired track and SOA are 090 T at 12 knots, find the course and speed needed to make the track and SOA good.
24. Example (C - 102 T) (S - 10.2 kts) Set - 045 T Drift - 3 kts TR - 090 T SOA - 12 kts
25. Sensibility Check 1. Current pushing ahead, decrease speed. 2. Current pushing astern, increase speed. 3. Current pushing left, steer more to the right. 4. Current pushing right, steer more to the left.