Worksheet 326 · Skill 5

Set and drift

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1. At 1330 your fix is 029°T, 2.9 nm from Heron Point Light. You steer 079°T at 5.2 kn through the water. At 1400 a new fix puts you 239°T, 1.8 nm from Tern Island tower.

   Plot the 1400 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 0820 your fix is 068°T, 3.4 nm from Westfield church spire. You steer 138°T at 4.8 kn through the water. At 0910 a new fix puts you 231°T, 3.1 nm from Tern Island tower.

   Plot the 0910 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  

3. At 1110 your fix is 269°T, 1.5 nm from Gannet Rock daybeacon. You steer 310°T at 8.0 kn through the water. At 1205 a new fix puts you 039°T, 3.9 nm from Westfield church spire.

   Plot the 1205 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  

4. At 1455 your fix is 111°T, 2.1 nm from Gannet Rock daybeacon. You steer 340°T at 4.8 kn through the water. At 1550 a new fix puts you 044°T, 3.8 nm from Gannet Rock daybeacon.

   Plot the 1550 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  

5. At 1150 your fix is 064°T, 3.0 nm from Westfield church spire. You steer 114°T at 4.4 kn through the water. At 1235 a new fix puts you 202°T, 1.7 nm from Tern Island tower.

   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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1420 your fix is 033°T, 3.2 nm from Westfield church spire. You steer 122°T at 5.1 kn through the water. At 1450 a new fix puts you 085°T, 3.5 nm from Westfield church spire.

   Plot the 1450 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 1120 your fix is 049°T, 2.6 nm from Heron Point Light. You steer 312°T at 4.3 kn through the water. At 1150 a new fix puts you 111°T, 1.7 nm from Westfield church spire.

   Plot the 1150 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 0800 your fix is 148°T, 1.9 nm from Westfield church spire. You steer 082°T at 4.7 kn through the water. At 0850 a new fix puts you 238°T, 3.0 nm from Tern Island tower.

   Plot the 0850 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