Worksheet 245 · 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 0715 your fix is 043°T, 4.1 nm from Westfield church spire. You steer 090°T at 7.0 kn through the water. At 0745 a new fix puts you 003°T, 1.7 nm from Tern Island tower.

   Plot the 0745 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 1455 your fix is 325°T, 1.5 nm from Tern Island tower. You steer 253°T at 7.7 kn through the water. At 1525 a new fix puts you 069°T, 3.4 nm from Westfield church spire.

   Plot the 1525 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 1120 your fix is 040°T, 2.0 nm from Heron Point Light. You steer 355°T at 4.8 kn through the water. At 1205 a new fix puts you 063°T, 2.8 nm from Westfield church spire.

   Plot the 1205 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  

4. At 1215 your fix is 062°T, 5.3 nm from Tern Island tower. You steer 200°T at 8.6 kn through the water. At 1305 a new fix puts you 345°T, 1.2 nm from Kittle water tank.

   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  

5. At 1325 your fix is 041°T, 4.4 nm from Westfield church spire. You steer 146°T at 6.0 kn through the water. At 1430 a new fix puts you 000°T, 2.4 nm from Mill stack.

   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 65 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1045 your fix is 034°T, 2.0 nm from Tern Island tower. You steer 067°T at 4.3 kn through the water. At 1115 a new fix puts you 056°T, 3.4 nm from Tern Island tower.

   Plot the 1115 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  

7. At 1020 your fix is 220°T, 3.2 nm from Tern Island tower. You steer 311°T at 4.9 kn through the water. At 1055 a new fix puts you 071°T, 3.1 nm from Westfield church spire.

   Plot the 1055 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 0900 your fix is 037°T, 4.9 nm from Gannet Rock daybeacon. You steer 232°T at 9.0 kn through the water. At 0955 a new fix puts you 217°T, 3.4 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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn