Worksheet 158 · 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 1505 your fix is 005°T, 2.4 nm from Mill stack. You steer 339°T at 4.0 kn through the water. At 1600 a new fix puts you 076°T, 3.3 nm from Westfield church spire.

   Plot the 1600 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  

2. At 1130 your fix is 063°T, 3.1 nm from Westfield church spire. You steer 146°T at 5.5 kn through the water. At 1215 a new fix puts you 344°T, 2.9 nm from Mill stack.

   Plot the 1215 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  

3. At 0730 your fix is 069°T, 1.7 nm from Heron Point Light. You steer 346°T at 4.4 kn through the water. At 0845 a new fix puts you 009°T, 3.2 nm from Westfield church spire.

   Plot the 0845 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 75 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1235 your fix is 319°T, 1.6 nm from Kittle water tank. You steer 312°T at 7.2 kn through the water. At 1345 a new fix puts you 255°T, 2.1 nm from Tern Island tower.

   Plot the 1345 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 70 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1325 your fix is 045°T, 1.7 nm from Kittle water tank. You steer 316°T at 6.6 kn through the water. At 1355 a new fix puts you 036°T, 1.1 nm from Gannet Rock daybeacon.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1315 your fix is 066°T, 1.4 nm from Heron Point Light. You steer 355°T at 6.9 kn through the water. At 1355 a new fix puts you 296°T, 3.8 nm from Tern Island tower.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1500 your fix is 062°T, 1.3 nm from Westfield church spire. You steer 118°T at 8.0 kn through the water. At 1600 a new fix puts you 010°T, 1.8 nm from Mill stack.

   Plot the 1600 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  

8. At 1015 your fix is 091°T, 1.9 nm from Tern Island tower. You steer 218°T at 5.5 kn through the water. At 1055 a new fix puts you 261°T, 1.5 nm from Gannet Rock daybeacon.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn