Worksheet 510 · 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 1555 your fix is 033°T, 2.3 nm from Westfield church spire. You steer 124°T at 4.5 kn through the water. At 1720 a new fix puts you 352°T, 2.2 nm from Mill stack.

   Plot the 1720 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 85 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 0930 your fix is 287°T, 3.3 nm from Tern Island tower. You steer 161°T at 5.4 kn through the water. At 1030 a new fix puts you 214°T, 2.2 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 60 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 0830 your fix is 041°T, 3.7 nm from Westfield church spire. You steer 125°T at 4.4 kn through the water. At 0940 a new fix puts you 264°T, 1.2 nm from Gannet Rock daybeacon.

   Plot the 0940 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  

4. At 0720 your fix is 261°T, 2.1 nm from Tern Island tower. You steer 299°T at 6.4 kn through the water. At 0810 a new fix puts you 038°T, 3.3 nm from Westfield church spire.

   Plot the 0810 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  

5. At 1515 your fix is 029°T, 0.9 nm from Gannet Rock daybeacon. You steer 139°T at 6.8 kn through the water. At 1545 a new fix puts you 016°T, 1.4 nm from Kittle water tank.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1025 your fix is 036°T, 3.0 nm from Heron Point Light. You steer 047°T at 4.5 kn through the water. At 1110 a new fix puts you 299°T, 1.5 nm from Tern Island tower.

   Plot the 1110 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  

7. At 1325 your fix is 266°T, 1.7 nm from Tern Island tower. You steer 144°T at 4.3 kn through the water. At 1420 a new fix puts you 254°T, 1.5 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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 0945 your fix is 097°T, 1.7 nm from Westfield church spire. You steer 079°T at 5.5 kn through the water. At 1030 a new fix puts you 264°T, 2.7 nm from Tern Island tower.

   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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn