Worksheet 3 · 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 0745 your fix is 212°T, 2.9 nm from Tern Island tower. You steer 300°T at 8.0 kn through the water. At 0815 a new fix puts you 084°T, 1.8 nm from Westfield church spire.

   Plot the 0815 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 1555 your fix is 076°T, 2.8 nm from Tern Island tower. You steer 280°T at 4.9 kn through the water. At 1650 a new fix puts you 316°T, 1.8 nm from Tern Island tower.

   Plot the 1650 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  

3. At 0920 your fix is 128°T, 1.4 nm from Tern Island tower. You steer 047°T at 6.8 kn through the water. At 0955 a new fix puts you 070°T, 4.7 nm from Tern Island tower.

   Plot the 0955 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 0740 your fix is 295°T, 3.7 nm from Tern Island tower. You steer 189°T at 4.1 kn through the water. At 0810 a new fix puts you 092°T, 3.7 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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 0935 your fix is 073°T, 1.9 nm from Westfield church spire. You steer 113°T at 4.6 kn through the water. At 1025 a new fix puts you 007°T, 2.8 nm from Mill stack.

   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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 0840 your fix is 295°T, 3.2 nm from Tern Island tower. You steer 287°T at 4.7 kn through the water. At 0920 a new fix puts you 013°T, 2.7 nm from Westfield church spire.

   Plot the 0920 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 1335 your fix is 089°T, 2.6 nm from Westfield church spire. You steer 045°T at 5.3 kn through the water. At 1425 a new fix puts you 339°T, 1.9 nm from Tern Island tower.

   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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 0830 your fix is 032°T, 3.1 nm from Heron Point Light. You steer 113°T at 5.1 kn through the water. At 0900 a new fix puts you 266°T, 2.9 nm from Gannet Rock daybeacon.

   Plot the 0900 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