Worksheet 561 · 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 1530 your fix is 062°T, 4.7 nm from Tern Island tower. You steer 268°T at 7.1 kn through the water. At 1600 a new fix puts you 352°T, 2.3 nm from Tern Island tower.

   Plot the 1600 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 1120 your fix is 054°T, 3.3 nm from Tern Island tower. You steer 257°T at 7.0 kn through the water. At 1150 a new fix puts you 305°T, 2.1 nm from Tern Island tower.

   Plot the 1150 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  

3. At 1325 your fix is 210°T, 2.5 nm from Gannet Rock daybeacon. You steer 314°T at 5.6 kn through the water. At 1400 a new fix puts you 211°T, 3.1 nm from Tern Island tower.

   Plot the 1400 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 1130 your fix is 317°T, 2.7 nm from Tern Island tower. You steer 269°T at 6.6 kn through the water. At 1215 a new fix puts you 012°T, 3.4 nm from Westfield church spire.

   Plot the 1215 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 1150 your fix is 023°T, 3.6 nm from Westfield church spire. You steer 127°T at 5.6 kn through the water. At 1235 a new fix puts you 254°T, 1.5 nm from Tern Island tower.

   Plot the 1235 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 1505 your fix is 194°T, 2.3 nm from Tern Island tower. You steer 280°T at 5.4 kn through the water. At 1545 a new fix puts you 023°T, 2.8 nm from Heron Point Light.

   Plot the 1545 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 1100 your fix is 047°T, 3.5 nm from Gannet Rock daybeacon. You steer 190°T at 4.3 kn through the water. At 1135 a new fix puts you 076°T, 3.3 nm from Gannet Rock daybeacon.

   Plot the 1135 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 1125 your fix is 012°T, 2.0 nm from Gannet Rock daybeacon. You steer 126°T at 4.9 kn through the water. At 1200 a new fix puts you 079°T, 2.9 nm from Gannet Rock daybeacon.

   Plot the 1200 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