Worksheet 848 · Skill 5

Set and drift

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1. At 1455 your fix is 090°T, 2.1 nm from Heron Point Light. You steer 084°T at 4.7 kn through the water. At 1605 a new fix puts you 043°T, 1.9 nm from Kittle water tank.

   Plot the 1605 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 70 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 1325 your fix is 066°T, 4.6 nm from Tern Island tower. You steer 191°T at 5.5 kn through the water. At 1355 a new fix puts you 042°T, 2.2 nm from Gannet Rock daybeacon.

   Plot the 1355 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  

3. At 1150 your fix is 109°T, 2.5 nm from Westfield church spire. You steer 085°T at 7.5 kn through the water. At 1240 a new fix puts you 018°T, 1.0 nm from Gannet Rock daybeacon.

   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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1145 your fix is 273°T, 2.2 nm from Gannet Rock daybeacon. You steer 258°T at 7.0 kn through the water. At 1225 a new fix puts you 062°T, 1.3 nm from Heron Point Light.

   Plot the 1225 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 1020 your fix is 142°T, 1.0 nm from Gannet Rock daybeacon. You steer 270°T at 5.6 kn through the water. At 1115 a new fix puts you 075°T, 1.6 nm from Heron Point Light.

   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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1140 your fix is 167°T, 1.2 nm from Westfield church spire. You steer 063°T at 8.4 kn through the water. At 1215 a new fix puts you 081°T, 3.5 nm from Westfield church spire.

   Plot the 1215 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  

7. At 0935 your fix is 025°T, 1.9 nm from Mill stack. You steer 329°T at 8.8 kn through the water. At 1005 a new fix puts you 073°T, 3.6 nm from Westfield church spire.

   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  

8. At 1550 your fix is 000°T, 1.6 nm from Westfield church spire. You steer 116°T at 4.0 kn through the water. At 1650 a new fix puts you 019°T, 2.8 nm from Heron Point Light.

   Plot the 1650 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