Worksheet 385 · 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 1205 your fix is 309°T, 1.8 nm from Tern Island tower. You steer 071°T at 4.5 kn through the water. At 1240 a new fix puts you 033°T, 2.6 nm from Tern Island tower.

   Plot the 1240 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 1525 your fix is 289°T, 2.4 nm from Tern Island tower. You steer 268°T at 4.6 kn through the water. At 1605 a new fix puts you 064°T, 3.3 nm from Westfield church spire.

   Plot the 1605 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  

3. At 1215 your fix is 288°T, 2.0 nm from Tern Island tower. You steer 201°T at 4.8 kn through the water. At 1305 a new fix puts you 244°T, 3.5 nm from Tern Island tower.

   Plot the 1305 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 1125 your fix is 356°T, 1.0 nm from Heron Point Light. You steer 091°T at 8.7 kn through the water. At 1210 a new fix puts you 258°T, 2.2 nm from Gannet Rock daybeacon.

   Plot the 1210 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 1145 your fix is 041°T, 4.3 nm from Westfield church spire. You steer 142°T at 6.7 kn through the water. At 1240 a new fix puts you 222°T, 2.4 nm from Gannet Rock daybeacon.

   Plot the 1240 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  

6. At 1250 your fix is 278°T, 2.8 nm from Tern Island tower. You steer 150°T at 6.6 kn through the water. At 1330 a new fix puts you 213°T, 3.3 nm from Tern Island tower.

   Plot the 1330 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 0805 your fix is 045°T, 3.0 nm from Tern Island tower. You steer 169°T at 6.2 kn through the water. At 0855 a new fix puts you 348°T, 3.0 nm from Kittle water tank.

   Plot the 0855 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 1155 your fix is 300°T, 3.2 nm from Tern Island tower. You steer 240°T at 4.9 kn through the water. At 1235 a new fix puts you 092°T, 1.6 nm from Westfield church spire.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn