Worksheet 751 · Skill 5

Set and drift

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1. At 1230 your fix is 029°T, 1.4 nm from Tern Island tower. You steer 096°T at 4.3 kn through the water. At 1300 a new fix puts you 025°T, 2.9 nm from Gannet Rock daybeacon.

   Plot the 1300 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 0810 your fix is 284°T, 1.9 nm from Gannet Rock daybeacon. You steer 277°T at 6.3 kn through the water. At 0905 a new fix puts you 113°T, 2.1 nm from Westfield church spire.

   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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 0710 your fix is 077°T, 4.0 nm from Tern Island tower. You steer 165°T at 4.4 kn through the water. At 0740 a new fix puts you 051°T, 2.9 nm from Gannet Rock daybeacon.

   Plot the 0740 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  

4. At 1430 your fix is 185°T, 1.2 nm from Gannet Rock daybeacon. You steer 284°T at 5.5 kn through the water. At 1500 a new fix puts you 018°T, 2.8 nm from Mill stack.

   Plot the 1500 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  

5. At 1155 your fix is 024°T, 3.4 nm from Westfield church spire. You steer 141°T at 5.5 kn through the water. At 1240 a new fix puts you 245°T, 3.2 nm from Tern Island tower.

   Plot the 1240 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  

6. At 0705 your fix is 186°T, 1.7 nm from Tern Island tower. You steer 066°T at 6.0 kn through the water. At 0750 a new fix puts you 035°T, 3.7 nm from Gannet Rock daybeacon.

   Plot the 0750 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  

7. At 1145 your fix is 086°T, 2.3 nm from Tern Island tower. You steer 122°T at 4.3 kn through the water. At 1230 a new fix puts you 092°T, 1.8 nm from Gannet Rock daybeacon.

   Plot the 1230 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  

8. At 1330 your fix is 148°T, 2.4 nm from Tern Island tower. You steer 051°T at 4.4 kn through the water. At 1405 a new fix puts you 017°T, 2.5 nm from Gannet Rock daybeacon.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn