Worksheet 911 · 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 0910 your fix is 032°T, 2.5 nm from Heron Point Light. You steer 082°T at 5.3 kn through the water. At 1030 a new fix puts you 268°T, 1.6 nm from Gannet Rock daybeacon.

   Plot the 1030 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 80 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 0945 your fix is 210°T, 3.3 nm from Tern Island tower. You steer 281°T at 4.0 kn through the water. At 1025 a new fix puts you 041°T, 3.2 nm from Heron Point Light.

   Plot the 1025 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  

3. At 1125 your fix is 002°T, 1.8 nm from Westfield church spire. You steer 085°T at 7.0 kn through the water. At 1240 a new fix puts you 014°T, 2.0 nm from Tern Island tower.

   Plot the 1240 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  

4. At 1000 your fix is 338°T, 1.0 nm from Heron Point Light. You steer 348°T at 4.7 kn through the water. At 1045 a new fix puts you 053°T, 2.8 nm from Westfield church spire.

   Plot the 1045 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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1440 your fix is 105°T, 1.1 nm from Gannet Rock daybeacon. You steer 022°T at 5.8 kn through the water. At 1525 a new fix puts you 071°T, 5.0 nm from Tern Island tower.

   Plot the 1525 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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 0725 your fix is 307°T, 2.3 nm from Tern Island tower. You steer 199°T at 4.2 kn through the water. At 0805 a new fix puts you 252°T, 2.3 nm from Tern Island tower.

   Plot the 0805 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  

7. At 0830 your fix is 061°T, 2.1 nm from Heron Point Light. You steer 325°T at 5.2 kn through the water. At 0900 a new fix puts you 099°T, 1.4 nm from Westfield church spire.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1405 your fix is 045°T, 1.9 nm from Westfield church spire. You steer 146°T at 9.0 kn through the water. At 1440 a new fix puts you 321°T, 2.2 nm from Mill stack.

   Plot the 1440 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