Worksheet 715 · 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 1310 your fix is 032°T, 2.5 nm from Tern Island tower. You steer 249°T at 7.5 kn through the water. At 1400 a new fix puts you 060°T, 3.8 nm from Westfield church spire.

   Plot the 1400 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 1555 your fix is 074°T, 2.0 nm from Heron Point Light. You steer 339°T at 8.1 kn through the water. At 1625 a new fix puts you 073°T, 2.8 nm from Westfield church spire.

   Plot the 1625 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  

3. At 1530 your fix is 076°T, 3.1 nm from Westfield church spire. You steer 110°T at 6.1 kn through the water. At 1610 a new fix puts you 171°T, 1.7 nm from Tern Island tower.

   Plot the 1610 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  

4. At 0850 your fix is 305°T, 2.4 nm from Tern Island tower. You steer 250°T at 6.0 kn through the water. At 0925 a new fix puts you 068°T, 2.9 nm from Westfield church spire.

   Plot the 0925 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  

5. At 1050 your fix is 233°T, 2.0 nm from Gannet Rock daybeacon. You steer 285°T at 4.1 kn through the water. At 1145 a new fix puts you 047°T, 2.0 nm from Heron Point Light.

   Plot the 1145 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 1300 your fix is 006°T, 3.4 nm from Westfield church spire. You steer 123°T at 7.3 kn through the water. At 1430 a new fix puts you 192°T, 2.1 nm from Tern Island tower.

   Plot the 1430 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 90 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1435 your fix is 204°T, 2.2 nm from Tern Island tower. You steer 148°T at 6.5 kn through the water. At 1505 a new fix puts you 289°T, 1.9 nm from Kittle water tank.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1305 your fix is 000°T, 1.3 nm from Westfield church spire. You steer 118°T at 4.7 kn through the water. At 1335 a new fix puts you 074°T, 1.7 nm from Westfield church spire.

   Plot the 1335 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