Worksheet 213 · 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 168°T, 1.6 nm from Westfield church spire. You steer 051°T at 5.6 kn through the water. At 1620 a new fix puts you 281°T, 3.1 nm from Tern Island tower.

   Plot the 1620 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  

2. At 1310 your fix is 014°T, 1.9 nm from Westfield church spire. You steer 085°T at 7.9 kn through the water. At 1345 a new fix puts you 297°T, 1.2 nm from Tern Island tower.

   Plot the 1345 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 1415 your fix is 064°T, 1.8 nm from Heron Point Light. You steer 019°T at 5.3 kn through the water. At 1505 a new fix puts you 274°T, 3.5 nm from Tern Island tower.

   Plot the 1505 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  

4. At 1320 your fix is 064°T, 1.9 nm from Westfield church spire. You steer 152°T at 6.0 kn through the water. At 1350 a new fix puts you 022°T, 1.3 nm from Heron Point Light.

   Plot the 1350 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  

5. At 1515 your fix is 209°T, 2.6 nm from Tern Island tower. You steer 239°T at 4.2 kn through the water. At 1545 a new fix puts you 352°T, 2.9 nm from Mill stack.

   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 1315 your fix is 037°T, 1.5 nm from Kittle water tank. You steer 289°T at 7.0 kn through the water. At 1345 a new fix puts you 270°T, 1.9 nm from Gannet Rock daybeacon.

   Plot the 1345 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 0745 your fix is 232°T, 3.2 nm from Tern Island tower. You steer 253°T at 4.1 kn through the water. At 0835 a new fix puts you 349°T, 1.0 nm from Heron Point Light.

   Plot the 0835 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  

8. At 0840 your fix is 017°T, 2.3 nm from Heron Point Light. You steer 113°T at 5.6 kn through the water. At 0935 a new fix puts you 013°T, 1.9 nm from Mill stack.

   Plot the 0935 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