Worksheet 882 · Skill 5

Set and drift

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1. At 1440 your fix is 234°T, 2.7 nm from Tern Island tower. You steer 314°T at 7.2 kn through the water. At 1530 a new fix puts you 019°T, 3.5 nm from Westfield church spire.

   Plot the 1530 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 1430 your fix is 225°T, 3.2 nm from Tern Island tower. You steer 015°T at 4.3 kn through the water. At 1505 a new fix puts you 280°T, 2.1 nm from Tern Island tower.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1600 your fix is 332°T, 2.8 nm from Kittle water tank. You steer 282°T at 6.5 kn through the water. At 1650 a new fix puts you 044°T, 3.5 nm from Heron Point Light.

   Plot the 1650 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  

4. At 1300 your fix is 086°T, 2.8 nm from Westfield church spire. You steer 120°T at 6.4 kn through the water. At 1405 a new fix puts you 339°T, 0.9 nm from Kittle water tank.

   Plot the 1405 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  

5. At 1250 your fix is 210°T, 2.5 nm from Gannet Rock daybeacon. You steer 310°T at 5.6 kn through the water. At 1415 a new fix puts you 169°T, 0.8 nm from Westfield church spire.

   Plot the 1415 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 85 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1250 your fix is 055°T, 1.8 nm from Kittle water tank. You steer 332°T at 6.4 kn through the water. At 1320 a new fix puts you 074°T, 1.7 nm from Gannet Rock daybeacon.

   Plot the 1320 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 1235 your fix is 003°T, 2.0 nm from Westfield church spire. You steer 141°T at 4.2 kn through the water. At 1345 a new fix puts you 042°T, 2.6 nm from Heron Point Light.

   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  

8. At 1200 your fix is 338°T, 1.7 nm from Kittle water tank. You steer 009°T at 5.6 kn through the water. At 1235 a new fix puts you 065°T, 2.0 nm from Gannet Rock daybeacon.

   Plot the 1235 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