Worksheet 282 · Skill 5

Set and drift

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1. At 1215 your fix is 060°T, 3.1 nm from Westfield church spire. You steer 208°T at 4.0 kn through the water. At 1300 a new fix puts you 106°T, 2.1 nm from Westfield church spire.

   Plot the 1300 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  

2. At 0740 your fix is 007°T, 1.5 nm from Kittle water tank. You steer 015°T at 4.6 kn through the water. At 0820 a new fix puts you 073°T, 2.3 nm from Gannet Rock daybeacon.

   Plot the 0820 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 1400 your fix is 009°T, 2.2 nm from Westfield church spire. You steer 078°T at 5.7 kn through the water. At 1445 a new fix puts you 287°T, 3.4 nm from Tern Island tower.

   Plot the 1445 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 1520 your fix is 022°T, 1.7 nm from Heron Point Light. You steer 003°T at 4.8 kn through the water. At 1555 a new fix puts you 075°T, 3.4 nm from Westfield church spire.

   Plot the 1555 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 1120 your fix is 286°T, 1.8 nm from Gannet Rock daybeacon. You steer 288°T at 4.7 kn through the water. At 1235 a new fix puts you 138°T, 1.4 nm from Westfield church spire.

   Plot the 1235 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  

6. At 1340 your fix is 359°T, 2.7 nm from Mill stack. You steer 350°T at 9.0 kn through the water. At 1410 a new fix puts you 287°T, 2.1 nm from Tern Island tower.

   Plot the 1410 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 1455 your fix is 155°T, 1.5 nm from Gannet Rock daybeacon. You steer 286°T at 6.5 kn through the water. At 1540 a new fix puts you 341°T, 2.6 nm from Mill stack.

   Plot the 1540 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  

8. At 1310 your fix is 009°T, 2.0 nm from Gannet Rock daybeacon. You steer 232°T at 4.4 kn through the water. At 1350 a new fix puts you 194°T, 1.8 nm from Tern Island tower.

   Plot the 1350 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