Worksheet 395 · 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 1020 your fix is 302°T, 1.4 nm from Tern Island tower. You steer 252°T at 6.1 kn through the water. At 1050 a new fix puts you 277°T, 3.0 nm from Tern Island tower.

   Plot the 1050 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  

2. At 0935 your fix is 041°T, 1.5 nm from Tern Island tower. You steer 270°T at 6.5 kn through the water. At 1015 a new fix puts you 313°T, 3.7 nm from Tern Island tower.

   Plot the 1015 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 1325 your fix is 120°T, 1.4 nm from Westfield church spire. You steer 096°T at 6.2 kn through the water. At 1405 a new fix puts you 041°T, 3.3 nm from Heron Point Light.

   Plot the 1405 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  

4. At 1135 your fix is 086°T, 2.9 nm from Westfield church spire. You steer 121°T at 4.6 kn through the water. At 1230 a new fix puts you 288°T, 1.3 nm from Gannet Rock daybeacon.

   Plot the 1230 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 1355 your fix is 023°T, 2.0 nm from Heron Point Light. You steer 347°T at 7.3 kn through the water. At 1425 a new fix puts you 035°T, 3.8 nm from Westfield church spire.

   Plot the 1425 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  

6. At 0845 your fix is 004°T, 1.8 nm from Gannet Rock daybeacon. You steer 081°T at 4.2 kn through the water. At 0915 a new fix puts you 033°T, 2.7 nm from Gannet Rock daybeacon.

   Plot the 0915 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 1045 your fix is 047°T, 4.2 nm from Westfield church spire. You steer 143°T at 6.3 kn through the water. At 1205 a new fix puts you 051°T, 1.5 nm from Mill stack.

   Plot the 1205 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  

8. At 1440 your fix is 179°T, 1.4 nm from Tern Island tower. You steer 273°T at 6.1 kn through the water. At 1525 a new fix puts you 070°T, 2.2 nm from Westfield church spire.

   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