Worksheet 324 · Skill 5

Set and drift

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1. At 0740 your fix is 205°T, 1.5 nm from Gannet Rock daybeacon. You steer 304°T at 8.5 kn through the water. At 0830 a new fix puts you 043°T, 2.2 nm from Westfield church spire.

   Plot the 0830 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  

2. At 1320 your fix is 191°T, 1.5 nm from Gannet Rock daybeacon. You steer 089°T at 4.0 kn through the water. At 1355 a new fix puts you 103°T, 2.4 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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1335 your fix is 079°T, 1.9 nm from Westfield church spire. You steer 128°T at 6.1 kn through the water. At 1440 a new fix puts you 003°T, 1.7 nm from Mill stack.

   Plot the 1440 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 65 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 0825 your fix is 239°T, 2.5 nm from Gannet Rock daybeacon. You steer 262°T at 6.1 kn through the water. At 0855 a new fix puts you 329°T, 2.3 nm from Mill stack.

   Plot the 0855 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  

5. At 1445 your fix is 326°T, 2.8 nm from Tern Island tower. You steer 261°T at 7.5 kn through the water. At 1525 a new fix puts you 006°T, 2.9 nm from Westfield church spire.

   Plot the 1525 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 1255 your fix is 340°T, 2.5 nm from Mill stack. You steer 358°T at 5.2 kn through the water. At 1325 a new fix puts you 226°T, 2.5 nm from Tern Island tower.

   Plot the 1325 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  

7. At 1505 your fix is 026°T, 1.7 nm from Heron Point Light. You steer 132°T at 4.7 kn through the water. At 1545 a new fix puts you 096°T, 1.8 nm from Heron Point Light.

   Plot the 1545 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 0945 your fix is 028°T, 2.2 nm from Mill stack. You steer 334°T at 6.0 kn through the water. At 1020 a new fix puts you 222°T, 3.4 nm from Tern Island tower.

   Plot the 1020 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