Worksheet 660 · 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 1335 your fix is 050°T, 3.2 nm from Westfield church spire. You steer 118°T at 5.8 kn through the water. At 1410 a new fix puts you 231°T, 2.5 nm from Tern Island tower.

   Plot the 1410 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  

2. At 1600 your fix is 092°T, 1.6 nm from Gannet Rock daybeacon. You steer 247°T at 5.6 kn through the water. At 1655 a new fix puts you 017°T, 1.2 nm from Mill stack.

   Plot the 1655 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 0725 your fix is 065°T, 2.6 nm from Westfield church spire. You steer 175°T at 4.2 kn through the water. At 0800 a new fix puts you 110°T, 2.4 nm from Westfield church spire.

   Plot the 0800 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 1300 your fix is 047°T, 1.9 nm from Westfield church spire. You steer 104°T at 8.4 kn through the water. At 1415 a new fix puts you 328°T, 1.2 nm from Kittle water tank.

   Plot the 1415 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 75 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1155 your fix is 070°T, 2.0 nm from Heron Point Light. You steer 350°T at 7.0 kn through the water. At 1230 a new fix puts you 076°T, 2.6 nm from Westfield church spire.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1320 your fix is 231°T, 2.5 nm from Tern Island tower. You steer 313°T at 4.9 kn through the water. At 1420 a new fix puts you 038°T, 2.4 nm from Westfield church spire.

   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 60 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1335 your fix is 301°T, 3.9 nm from Tern Island tower. You steer 092°T at 5.6 kn through the water. At 1405 a new fix puts you 337°T, 1.6 nm from Tern Island tower.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 0955 your fix is 076°T, 1.2 nm from Westfield church spire. You steer 001°T at 5.1 kn through the water. At 1025 a new fix puts you 022°T, 2.3 nm from Westfield church spire.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn