Worksheet 414 · Skill 5

Set and drift

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1. At 0715 your fix is 004°T, 1.7 nm from Mill stack. You steer 075°T at 8.6 kn through the water. At 0745 a new fix puts you 119°T, 1.5 nm from Gannet Rock daybeacon.

   Plot the 0745 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 1140 your fix is 296°T, 2.8 nm from Tern Island tower. You steer 199°T at 4.6 kn through the water. At 1225 a new fix puts you 267°T, 3.3 nm from Tern Island tower.

   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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1155 your fix is 011°T, 2.9 nm from Mill stack. You steer 325°T at 6.4 kn through the water. At 1250 a new fix puts you 060°T, 3.3 nm from Westfield church spire.

   Plot the 1250 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  

4. At 1110 your fix is 097°T, 2.9 nm from Westfield church spire. You steer 060°T at 5.2 kn through the water. At 1145 a new fix puts you 283°T, 1.5 nm from Tern Island tower.

   Plot the 1145 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 1035 your fix is 090°T, 2.4 nm from Westfield church spire. You steer 130°T at 4.0 kn through the water. At 1125 a new fix puts you 205°T, 2.6 nm from Tern Island tower.

   Plot the 1125 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  

6. At 0920 your fix is 282°T, 3.3 nm from Tern Island tower. You steer 169°T at 4.6 kn through the water. At 1005 a new fix puts you 042°T, 3.0 nm from Heron Point Light.

   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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1010 your fix is 155°T, 1.6 nm from Gannet Rock daybeacon. You steer 302°T at 4.1 kn through the water. At 1050 a new fix puts you 237°T, 2.3 nm from Gannet Rock daybeacon.

   Plot the 1050 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  

8. At 0740 your fix is 041°T, 3.0 nm from Westfield church spire. You steer 138°T at 4.8 kn through the water. At 0825 a new fix puts you 051°T, 3.5 nm from Heron Point Light.

   Plot the 0825 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