Worksheet 352 · Skill 5

Set and drift

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1. At 0940 your fix is 059°T, 0.8 nm from Heron Point Light. You steer 009°T at 9.0 kn through the water. At 1020 a new fix puts you 058°T, 3.9 nm from Westfield church spire.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 0835 your fix is 028°T, 1.8 nm from Kittle water tank. You steer 265°T at 4.6 kn through the water. At 0955 a new fix puts you 218°T, 2.4 nm from Gannet Rock daybeacon.

   Plot the 0955 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 80 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1025 your fix is 056°T, 3.0 nm from Tern Island tower. You steer 144°T at 4.0 kn through the water. At 1105 a new fix puts you 033°T, 3.8 nm from Gannet Rock daybeacon.

   Plot the 1105 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  

4. At 0755 your fix is 026°T, 3.0 nm from Westfield church spire. You steer 166°T at 6.8 kn through the water. At 0825 a new fix puts you 076°T, 1.8 nm from Westfield church spire.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1220 your fix is 323°T, 1.5 nm from Tern Island tower. You steer 239°T at 4.9 kn through the water. At 1350 a new fix puts you 070°T, 1.6 nm from Heron Point Light.

   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 90 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1040 your fix is 249°T, 3.4 nm from Tern Island tower. You steer 325°T at 7.9 kn through the water. At 1110 a new fix puts you 042°T, 3.3 nm from Westfield church spire.

   Plot the 1110 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 1300 your fix is 019°T, 3.7 nm from Westfield church spire. You steer 127°T at 5.8 kn through the water. At 1350 a new fix puts you 076°T, 3.6 nm from Westfield church spire.

   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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1540 your fix is 006°T, 2.1 nm from Gannet Rock daybeacon. You steer 146°T at 4.4 kn through the water. At 1645 a new fix puts you 104°T, 2.6 nm from Gannet Rock daybeacon.

   Plot the 1645 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