Worksheet 50 · 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 0825 your fix is 006°T, 2.8 nm from Mill stack. You steer 270°T at 4.5 kn through the water. At 0900 a new fix puts you 054°T, 2.5 nm from Heron Point Light.

   Plot the 0900 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  

2. At 1210 your fix is 081°T, 2.8 nm from Westfield church spire. You steer 038°T at 4.2 kn through the water. At 1245 a new fix puts you 299°T, 3.0 nm from Tern Island tower.

   Plot the 1245 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  

3. At 1345 your fix is 029°T, 1.8 nm from Mill stack. You steer 355°T at 8.6 kn through the water. At 1415 a new fix puts you 234°T, 1.8 nm from Tern Island tower.

   Plot the 1415 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 0920 your fix is 039°T, 4.6 nm from Gannet Rock daybeacon. You steer 202°T at 4.3 kn through the water. At 1000 a new fix puts you 109°T, 1.6 nm from Gannet Rock daybeacon.

   Plot the 1000 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 0720 your fix is 248°T, 2.0 nm from Tern Island tower. You steer 136°T at 6.2 kn through the water. At 0800 a new fix puts you 170°T, 1.6 nm from Gannet Rock daybeacon.

   Plot the 0800 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  

6. At 0720 your fix is 051°T, 2.9 nm from Heron Point Light. You steer 264°T at 4.5 kn through the water. At 0755 a new fix puts you 352°T, 1.0 nm from Heron Point Light.

   Plot the 0755 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  

7. At 1300 your fix is 086°T, 2.7 nm from Gannet Rock daybeacon. You steer 238°T at 6.8 kn through the water. At 1335 a new fix puts you 239°T, 1.6 nm from Gannet Rock daybeacon.

   Plot the 1335 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  

8. At 1425 your fix is 075°T, 2.6 nm from Tern Island tower. You steer 226°T at 5.5 kn through the water. At 1520 a new fix puts you 277°T, 1.3 nm from Gannet Rock daybeacon.

   Plot the 1520 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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn