Worksheet 392 · Skill 5

Set and drift

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1. At 1415 your fix is 330°T, 1.2 nm from Heron Point Light. You steer 060°T at 6.7 kn through the water. At 1500 a new fix puts you 211°T, 2.8 nm from Tern Island tower.

   Plot the 1500 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 1040 your fix is 212°T, 1.5 nm from Tern Island tower. You steer 133°T at 4.9 kn through the water. At 1110 a new fix puts you 239°T, 1.7 nm from Gannet Rock daybeacon.

   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  

3. At 0830 your fix is 031°T, 2.9 nm from Gannet Rock daybeacon. You steer 166°T at 8.3 kn through the water. At 0900 a new fix puts you 100°T, 2.5 nm from Gannet Rock daybeacon.

   Plot the 0900 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 1015 your fix is 298°T, 1.5 nm from Tern Island tower. You steer 262°T at 7.5 kn through the water. At 1055 a new fix puts you 020°T, 1.1 nm from Westfield church spire.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1050 your fix is 079°T, 2.3 nm from Heron Point Light. You steer 067°T at 4.0 kn through the water. At 1135 a new fix puts you 251°T, 2.5 nm from Gannet Rock daybeacon.

   Plot the 1135 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  

6. At 1340 your fix is 319°T, 1.5 nm from Gannet Rock daybeacon. You steer 254°T at 4.6 kn through the water. At 1450 a new fix puts you 097°T, 2.8 nm from Westfield church spire.

   Plot the 1450 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  

7. At 1425 your fix is 009°T, 1.8 nm from Gannet Rock daybeacon. You steer 146°T at 5.9 kn through the water. At 1510 a new fix puts you 076°T, 1.7 nm from Kittle water tank.

   Plot the 1510 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 1405 your fix is 235°T, 1.7 nm from Tern Island tower. You steer 149°T at 5.8 kn through the water. At 1440 a new fix puts you 192°T, 1.4 nm from Gannet Rock daybeacon.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn