Worksheet 765 · 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 258°T, 3.4 nm from Tern Island tower. You steer 053°T at 8.0 kn through the water. At 0945 a new fix puts you 328°T, 1.5 nm from Tern Island tower.

   Plot the 0945 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 1410 your fix is 003°T, 1.3 nm from Kittle water tank. You steer 290°T at 5.0 kn through the water. At 1520 a new fix puts you 007°T, 3.2 nm from Mill stack.

   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 70 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1045 your fix is 053°T, 3.6 nm from Gannet Rock daybeacon. You steer 253°T at 4.7 kn through the water. At 1145 a new fix puts you 118°T, 1.4 nm from Tern Island tower.

   Plot the 1145 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 60 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 0955 your fix is 046°T, 2.4 nm from Mill stack. You steer 350°T at 4.4 kn through the water. At 1030 a new fix puts you 262°T, 2.9 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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1330 your fix is 068°T, 4.2 nm from Tern Island tower. You steer 177°T at 5.6 kn through the water. At 1420 a new fix puts you 113°T, 2.1 nm from Gannet Rock daybeacon.

   Plot the 1420 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  

6. At 0955 your fix is 331°T, 1.4 nm from Heron Point Light. You steer 051°T at 5.8 kn through the water. At 1025 a new fix puts you 033°T, 2.2 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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 0710 your fix is 095°T, 1.5 nm from Heron Point Light. You steer 342°T at 6.0 kn through the water. At 0820 a new fix puts you 038°T, 4.2 nm from Westfield church spire.

   Plot the 0820 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 70 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1240 your fix is 091°T, 2.1 nm from Heron Point Light. You steer 064°T at 6.3 kn through the water. At 1325 a new fix puts you 146°T, 2.5 nm from Tern Island tower.

   Plot the 1325 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