Worksheet 694 · Skill 5

Set and drift

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1. At 0840 your fix is 113°T, 0.9 nm from Gannet Rock daybeacon. You steer 031°T at 4.0 kn through the water. At 0915 a new fix puts you 048°T, 2.9 nm from Gannet Rock daybeacon.

   Plot the 0915 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 0945 your fix is 060°T, 2.7 nm from Westfield church spire. You steer 112°T at 8.2 kn through the water. At 1015 a new fix puts you 228°T, 1.4 nm from Tern Island tower.

   Plot the 1015 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 0955 your fix is 302°T, 2.2 nm from Tern Island tower. You steer 194°T at 6.4 kn through the water. At 1040 a new fix puts you 346°T, 2.4 nm from Mill stack.

   Plot the 1040 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  

4. At 0945 your fix is 106°T, 2.0 nm from Westfield church spire. You steer 113°T at 7.1 kn through the water. At 1035 a new fix puts you 035°T, 2.5 nm from Mill stack.

   Plot the 1035 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  

5. At 1150 your fix is 157°T, 1.8 nm from Westfield church spire. You steer 085°T at 6.6 kn through the water. At 1230 a new fix puts you 351°T, 3.4 nm from Mill stack.

   Plot the 1230 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 1120 your fix is 065°T, 2.7 nm from Heron Point Light. You steer 313°T at 4.7 kn through the water. At 1200 a new fix puts you 082°T, 2.4 nm from Westfield church spire.

   Plot the 1200 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  

7. At 0905 your fix is 043°T, 2.1 nm from Mill stack. You steer 072°T at 4.8 kn through the water. At 1015 a new fix puts you 077°T, 2.7 nm from Gannet Rock daybeacon.

   Plot the 1015 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  

8. At 1130 your fix is 231°T, 3.2 nm from Tern Island tower. You steer 085°T at 6.6 kn through the water. At 1200 a new fix puts you 339°T, 1.4 nm from Gannet Rock daybeacon.

   Plot the 1200 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