Worksheet 523 · Skill 5

Set and drift

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1. At 1205 your fix is 026°T, 2.2 nm from Westfield church spire. You steer 116°T at 4.2 kn through the water. At 1325 a new fix puts you 258°T, 2.4 nm from Gannet Rock daybeacon.

   Plot the 1325 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 80 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 1400 your fix is 344°T, 1.2 nm from Gannet Rock daybeacon. You steer 273°T at 4.4 kn through the water. At 1430 a new fix puts you 169°T, 1.2 nm from Tern Island tower.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1310 your fix is 190°T, 1.8 nm from Gannet Rock daybeacon. You steer 317°T at 8.1 kn through the water. At 1410 a new fix puts you 055°T, 3.1 nm from Westfield church spire.

   Plot the 1410 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  

4. At 1040 your fix is 048°T, 1.6 nm from Westfield church spire. You steer 092°T at 5.1 kn through the water. At 1130 a new fix puts you 284°T, 1.5 nm from Tern Island tower.

   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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1010 your fix is 091°T, 3.3 nm from Westfield church spire. You steer 098°T at 7.0 kn through the water. At 1100 a new fix puts you 149°T, 2.6 nm from Tern Island tower.

   Plot the 1100 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  

6. At 1415 your fix is 284°T, 1.1 nm from Gannet Rock daybeacon. You steer 277°T at 4.3 kn through the water. At 1525 a new fix puts you 064°T, 2.0 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 70 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1010 your fix is 011°T, 1.8 nm from Gannet Rock daybeacon. You steer 012°T at 6.8 kn through the water. At 1040 a new fix puts you 055°T, 3.7 nm from Tern Island tower.

   Plot the 1040 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  

8. At 1535 your fix is 033°T, 1.8 nm from Mill stack. You steer 309°T at 7.8 kn through the water. At 1635 a new fix puts you 099°T, 1.8 nm from Westfield church spire.

   Plot the 1635 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