Worksheet 489 · 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 051°T, 1.4 nm from Kittle water tank. You steer 345°T at 5.8 kn through the water. At 0930 a new fix puts you 069°T, 4.8 nm from Tern Island tower.

   Plot the 0930 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  

2. At 1405 your fix is 307°T, 3.9 nm from Tern Island tower. You steer 172°T at 8.9 kn through the water. At 1440 a new fix puts you 065°T, 2.2 nm from Heron Point Light.

   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  

3. At 0920 your fix is 262°T, 2.0 nm from Tern Island tower. You steer 310°T at 6.1 kn through the water. At 0955 a new fix puts you 043°T, 4.6 nm from Westfield church spire.

   Plot the 0955 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  

4. At 0940 your fix is 208°T, 1.6 nm from Tern Island tower. You steer 076°T at 6.0 kn through the water. At 1035 a new fix puts you 048°T, 3.2 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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1250 your fix is 050°T, 3.8 nm from Gannet Rock daybeacon. You steer 309°T at 5.5 kn through the water. At 1330 a new fix puts you 048°T, 2.3 nm from Tern Island tower.

   Plot the 1330 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 1055 your fix is 030°T, 2.3 nm from Westfield church spire. You steer 120°T at 8.3 kn through the water. At 1125 a new fix puts you 036°T, 3.6 nm from Heron Point Light.

   Plot the 1125 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 0840 your fix is 071°T, 1.4 nm from Gannet Rock daybeacon. You steer 009°T at 8.3 kn through the water. At 0910 a new fix puts you 065°T, 4.6 nm from Tern Island tower.

   Plot the 0910 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 1035 your fix is 231°T, 2.4 nm from Tern Island tower. You steer 250°T at 6.2 kn through the water. At 1120 a new fix puts you 024°T, 1.6 nm from Heron Point Light.

   Plot the 1120 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