Worksheet 805 · Skill 5

Set and drift

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1. At 1235 your fix is 001°T, 1.3 nm from Kittle water tank. You steer 285°T at 5.0 kn through the water. At 1335 a new fix puts you 015°T, 2.8 nm from Mill stack.

   Plot the 1335 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  

2. At 1210 your fix is 047°T, 2.1 nm from Westfield church spire. You steer 074°T at 7.0 kn through the water. At 1240 a new fix puts you 319°T, 2.3 nm from Tern Island tower.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1300 your fix is 197°T, 2.4 nm from Tern Island tower. You steer 288°T at 4.9 kn through the water. At 1410 a new fix puts you 045°T, 3.5 nm from Westfield church spire.

   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 70 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1120 your fix is 052°T, 3.2 nm from Westfield church spire. You steer 130°T at 7.8 kn through the water. At 1220 a new fix puts you 343°T, 1.1 nm from Kittle water tank.

   Plot the 1220 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  

5. At 1220 your fix is 342°T, 1.1 nm from Kittle water tank. You steer 272°T at 6.6 kn through the water. At 1315 a new fix puts you 023°T, 2.1 nm from Mill stack.

   Plot the 1315 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 0905 your fix is 285°T, 1.8 nm from Tern Island tower. You steer 229°T at 4.9 kn through the water. At 0935 a new fix puts you 268°T, 2.9 nm from Tern Island tower.

   Plot the 0935 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 1120 your fix is 070°T, 3.3 nm from Tern Island tower. You steer 148°T at 4.1 kn through the water. At 1215 a new fix puts you 013°T, 2.0 nm from Kittle water tank.

   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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 0850 your fix is 259°T, 2.9 nm from Gannet Rock daybeacon. You steer 123°T at 5.3 kn through the water. At 0920 a new fix puts you 281°T, 2.4 nm from Kittle water tank.

   Plot the 0920 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