Worksheet 237 · 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 1255 your fix is 318°T, 1.4 nm from Kittle water tank. You steer 292°T at 7.2 kn through the water. At 1355 a new fix puts you 045°T, 3.1 nm from Heron Point Light.

   Plot the 1355 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  

2. At 0835 your fix is 054°T, 1.9 nm from Gannet Rock daybeacon. You steer 215°T at 8.6 kn through the water. At 0905 a new fix puts you 286°T, 2.1 nm from Kittle water tank.

   Plot the 0905 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 1310 your fix is 021°T, 2.3 nm from Tern Island tower. You steer 271°T at 6.0 kn through the water. At 1350 a new fix puts you 307°T, 3.6 nm from Tern Island tower.

   Plot the 1350 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 0805 your fix is 043°T, 4.5 nm from Westfield church spire. You steer 226°T at 4.0 kn through the water. At 0840 a new fix puts you 063°T, 1.9 nm from Westfield church spire.

   Plot the 0840 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 1035 your fix is 033°T, 4.1 nm from Westfield church spire. You steer 177°T at 5.2 kn through the water. At 1115 a new fix puts you 070°T, 1.1 nm from Westfield church spire.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1340 your fix is 038°T, 4.3 nm from Westfield church spire. You steer 102°T at 7.1 kn through the water. At 1440 a new fix puts you 059°T, 2.4 nm from Tern Island tower.

   Plot the 1440 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 1040 your fix is 006°T, 3.2 nm from Mill stack. You steer 275°T at 4.7 kn through the water. At 1115 a new fix puts you 028°T, 2.4 nm from Heron Point Light.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1345 your fix is 021°T, 2.6 nm from Westfield church spire. You steer 114°T at 6.7 kn through the water. At 1425 a new fix puts you 251°T, 2.0 nm from Tern Island tower.

   Plot the 1425 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