Worksheet 581 · 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 1050 your fix is 049°T, 2.7 nm from Westfield church spire. You steer 148°T at 5.1 kn through the water. At 1130 a new fix puts you 352°T, 3.3 nm from Mill stack.

   Plot the 1130 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  

2. At 1025 your fix is 197°T, 2.0 nm from Tern Island tower. You steer 291°T at 5.6 kn through the water. At 1105 a new fix puts you 239°T, 3.3 nm from Tern Island tower.

   Plot the 1105 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 0705 your fix is 031°T, 3.6 nm from Heron Point Light. You steer 244°T at 4.3 kn through the water. At 0735 a new fix puts you 144°T, 1.1 nm from Westfield church spire.

   Plot the 0735 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  

4. At 1505 your fix is 011°T, 2.9 nm from Westfield church spire. You steer 127°T at 4.2 kn through the water. At 1550 a new fix puts you 072°T, 1.6 nm from Westfield church spire.

   Plot the 1550 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 1425 your fix is 298°T, 1.9 nm from Tern Island tower. You steer 196°T at 5.1 kn through the water. At 1520 a new fix puts you 054°T, 3.4 nm from Heron Point Light.

   Plot the 1520 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 1515 your fix is 061°T, 3.2 nm from Westfield church spire. You steer 216°T at 6.5 kn through the water. At 1550 a new fix puts you 127°T, 1.8 nm from Westfield church spire.

   Plot the 1550 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  

7. At 1045 your fix is 355°T, 3.1 nm from Mill stack. You steer 267°T at 7.2 kn through the water. At 1120 a new fix puts you 017°T, 1.2 nm from Heron Point Light.

   Plot the 1120 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  

8. At 1030 your fix is 024°T, 2.0 nm from Heron Point Light. You steer 078°T at 8.2 kn through the water. At 1135 a new fix puts you 068°T, 3.1 nm from Gannet Rock daybeacon.

   Plot the 1135 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 65 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn