Worksheet 244 · Skill 5

Set and drift

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1. At 1300 your fix is 141°T, 1.6 nm from Gannet Rock daybeacon. You steer 266°T at 6.7 kn through the water. At 1350 a new fix puts you 054°T, 1.0 nm from Heron Point Light.

   Plot the 1350 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 0835 your fix is 047°T, 2.1 nm from Westfield church spire. You steer 099°T at 5.1 kn through the water. At 0910 a new fix puts you 296°T, 2.4 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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1005 your fix is 049°T, 3.9 nm from Westfield church spire. You steer 089°T at 8.1 kn through the water. At 1045 a new fix puts you 051°T, 3.4 nm from Tern Island tower.

   Plot the 1045 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  

4. At 1300 your fix is 223°T, 2.9 nm from Tern Island tower. You steer 254°T at 4.1 kn through the water. At 1340 a new fix puts you 135°T, 1.9 nm from Westfield church spire.

   Plot the 1340 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  

5. At 0920 your fix is 359°T, 0.8 nm from Kittle water tank. You steer 344°T at 5.6 kn through the water. At 1000 a new fix puts you 016°T, 2.3 nm from Gannet Rock daybeacon.

   Plot the 1000 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  

6. At 1305 your fix is 057°T, 2.8 nm from Heron Point Light. You steer 324°T at 4.2 kn through the water. At 1350 a new fix puts you 087°T, 3.2 nm from Westfield church spire.

   Plot the 1350 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 1355 your fix is 041°T, 2.0 nm from Heron Point Light. You steer 083°T at 4.6 kn through the water. At 1430 a new fix puts you 264°T, 2.6 nm from Gannet Rock daybeacon.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 0740 your fix is 210°T, 1.9 nm from Gannet Rock daybeacon. You steer 318°T at 8.0 kn through the water. At 0840 a new fix puts you 048°T, 3.5 nm from Westfield church spire.

   Plot the 0840 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