Worksheet 922 · Skill 5

Set and drift

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1. At 1345 your fix is 044°T, 1.3 nm from Kittle water tank. You steer 013°T at 4.1 kn through the water. At 1420 a new fix puts you 073°T, 3.1 nm from Gannet Rock daybeacon.

   Plot the 1420 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  

2. At 1455 your fix is 303°T, 2.8 nm from Tern Island tower. You steer 225°T at 4.9 kn through the water. At 1540 a new fix puts you 024°T, 2.3 nm from Heron Point Light.

   Plot the 1540 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  

3. At 0935 your fix is 286°T, 3.6 nm from Tern Island tower. You steer 191°T at 6.6 kn through the water. At 1005 a new fix puts you 243°T, 3.6 nm from Tern Island tower.

   Plot the 1005 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 1055 your fix is 090°T, 2.2 nm from Gannet Rock daybeacon. You steer 220°T at 4.1 kn through the water. At 1140 a new fix puts you 333°T, 1.1 nm from Kittle water tank.

   Plot the 1140 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  

5. At 1040 your fix is 033°T, 3.0 nm from Gannet Rock daybeacon. You steer 302°T at 8.0 kn through the water. At 1115 a new fix puts you 330°T, 1.6 nm from Tern Island tower.

   Plot the 1115 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  

6. At 0940 your fix is 352°T, 3.3 nm from Mill stack. You steer 356°T at 5.0 kn through the water. At 1025 a new fix puts you 271°T, 3.0 nm from Tern Island tower.

   Plot the 1025 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 1030 your fix is 227°T, 2.4 nm from Tern Island tower. You steer 276°T at 7.0 kn through the water. At 1105 a new fix puts you 072°T, 2.6 nm from Westfield church spire.

   Plot the 1105 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 1355 your fix is 023°T, 1.2 nm from Westfield church spire. You steer 124°T at 4.3 kn through the water. At 1515 a new fix puts you 358°T, 1.7 nm from Mill stack.

   Plot the 1515 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