Worksheet 297 · Skill 5

Set and drift

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1. At 1105 your fix is 222°T, 2.6 nm from Gannet Rock daybeacon. You steer 287°T at 7.4 kn through the water. At 1140 a new fix puts you 042°T, 3.0 nm from Heron Point Light.

   Plot the 1140 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 1140 your fix is 040°T, 2.0 nm from Kittle water tank. You steer 009°T at 4.4 kn through the water. At 1230 a new fix puts you 051°T, 3.0 nm from Gannet Rock daybeacon.

   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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1310 your fix is 012°T, 1.8 nm from Heron Point Light. You steer 007°T at 7.3 kn through the water. At 1340 a new fix puts you 056°T, 3.8 nm from Westfield church spire.

   Plot the 1340 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  

4. At 1600 your fix is 308°T, 2.3 nm from Tern Island tower. You steer 188°T at 6.4 kn through the water. At 1655 a new fix puts you 039°T, 2.6 nm from Heron Point Light.

   Plot the 1655 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  

5. At 1455 your fix is 227°T, 2.9 nm from Tern Island tower. You steer 001°T at 6.8 kn through the water. At 1525 a new fix puts you 319°T, 1.5 nm from Tern Island tower.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 0855 your fix is 355°T, 1.7 nm from Mill stack. You steer 354°T at 4.4 kn through the water. At 1010 a new fix puts you 264°T, 2.1 nm from Tern Island tower.

   Plot the 1010 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  

7. At 0720 your fix is 077°T, 2.5 nm from Westfield church spire. You steer 014°T at 4.3 kn through the water. At 0750 a new fix puts you 290°T, 3.9 nm from Tern Island tower.

   Plot the 0750 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  

8. At 1005 your fix is 020°T, 2.9 nm from Westfield church spire. You steer 095°T at 6.6 kn through the water. At 1055 a new fix puts you 356°T, 1.3 nm from Tern Island tower.

   Plot the 1055 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