Worksheet 519 · Skill 5

Set and drift

Print this worksheet Next sheet

Plot Pass worksheet. Plot Pass $1.95/month or $19.50/year · Free during preview. Plotroom · cedarpointmarina.net · invented chart, not for navigation.

1. At 0945 your fix is 027°T, 2.1 nm from Tern Island tower. You steer 134°T at 6.7 kn through the water. At 1035 a new fix puts you 076°T, 2.9 nm from Gannet Rock daybeacon.

   Plot the 1035 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 0730 your fix is 046°T, 1.1 nm from Westfield church spire. You steer 115°T at 4.4 kn through the water. At 0845 a new fix puts you 285°T, 1.8 nm from Gannet Rock daybeacon.

   Plot the 0845 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 75 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1320 your fix is 234°T, 2.2 nm from Tern Island tower. You steer 101°T at 5.2 kn through the water. At 1350 a new fix puts you 290°T, 1.5 nm from Gannet Rock daybeacon.

   Plot the 1350 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1315 your fix is 125°T, 1.0 nm from Gannet Rock daybeacon. You steer 264°T at 5.2 kn through the water. At 1355 a new fix puts you 215°T, 3.2 nm from Tern Island tower.

   Plot the 1355 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 0905 your fix is 059°T, 1.2 nm from Westfield church spire. You steer 065°T at 7.4 kn through the water. At 0940 a new fix puts you 308°T, 3.7 nm from Tern Island tower.

   Plot the 0940 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1100 your fix is 044°T, 3.3 nm from Heron Point Light. You steer 088°T at 6.8 kn through the water. At 1130 a new fix puts you 208°T, 1.5 nm from Tern Island tower.

   Plot the 1130 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1205 your fix is 106°T, 1.6 nm from Westfield church spire. You steer 106°T at 6.4 kn through the water. At 1255 a new fix puts you 243°T, 1.3 nm from Gannet Rock daybeacon.

   Plot the 1255 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 0750 your fix is 116°T, 1.9 nm from Gannet Rock daybeacon. You steer 274°T at 4.8 kn through the water. At 0855 a new fix puts you 265°T, 2.7 nm from Gannet Rock daybeacon.

   Plot the 0855 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 65 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn