Worksheet 696 · Skill 5

Set and drift

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1. At 1150 your fix is 101°T, 3.0 nm from Westfield church spire. You steer 146°T at 6.7 kn through the water. At 1220 a new fix puts you 004°T, 0.9 nm from Mill stack.

   Plot the 1220 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 1455 your fix is 223°T, 1.5 nm from Tern Island tower. You steer 216°T at 4.1 kn through the water. At 1535 a new fix puts you 341°T, 2.6 nm from Mill stack.

   Plot the 1535 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  

3. At 1250 your fix is 303°T, 4.3 nm from Tern Island tower. You steer 097°T at 5.2 kn through the water. At 1405 a new fix puts you 041°T, 2.9 nm from Tern Island tower.

   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 75 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 0905 your fix is 219°T, 3.1 nm from Tern Island tower. You steer 080°T at 5.9 kn through the water. At 0940 a new fix puts you 157°T, 2.9 nm from Tern Island tower.

   Plot the 0940 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  

5. At 1105 your fix is 050°T, 4.2 nm from Westfield church spire. You steer 238°T at 4.6 kn through the water. At 1135 a new fix puts you 043°T, 3.1 nm from Westfield church spire.

   Plot the 1135 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  

6. At 1600 your fix is 056°T, 2.2 nm from Heron Point Light. You steer 104°T at 6.6 kn through the water. At 1655 a new fix puts you 343°T, 1.4 nm from Kittle water tank.

   Plot the 1655 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  

7. At 1055 your fix is 206°T, 2.1 nm from Gannet Rock daybeacon. You steer 325°T at 7.2 kn through the water. At 1150 a new fix puts you 063°T, 3.0 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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1530 your fix is 273°T, 2.4 nm from Tern Island tower. You steer 151°T at 8.3 kn through the water. At 1600 a new fix puts you 024°T, 2.6 nm from Mill stack.

   Plot the 1600 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