Worksheet 898 · Skill 5

Set and drift

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1. At 1400 your fix is 086°T, 3.2 nm from Westfield church spire. You steer 155°T at 6.2 kn through the water. At 1435 a new fix puts you 069°T, 2.5 nm from Heron Point Light.

   Plot the 1435 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 1115 your fix is 265°T, 2.6 nm from Tern Island tower. You steer 181°T at 8.2 kn through the water. At 1145 a new fix puts you 353°T, 1.8 nm from Mill stack.

   Plot the 1145 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 1500 your fix is 298°T, 2.8 nm from Tern Island tower. You steer 280°T at 8.5 kn through the water. At 1530 a new fix puts you 030°T, 3.1 nm from Westfield church spire.

   Plot the 1530 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 1110 your fix is 034°T, 2.4 nm from Westfield church spire. You steer 106°T at 6.1 kn through the water. At 1155 a new fix puts you 314°T, 1.3 nm from Tern Island tower.

   Plot the 1155 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  

5. At 1150 your fix is 238°T, 1.9 nm from Gannet Rock daybeacon. You steer 276°T at 8.7 kn through the water. At 1220 a new fix puts you 049°T, 2.1 nm from Heron Point Light.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 0750 your fix is 036°T, 3.4 nm from Westfield church spire. You steer 106°T at 4.3 kn through the water. At 0840 a new fix puts you 059°T, 4.0 nm from Westfield church spire.

   Plot the 0840 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  

7. At 1455 your fix is 248°T, 2.5 nm from Gannet Rock daybeacon. You steer 277°T at 4.3 kn through the water. At 1530 a new fix puts you 038°T, 2.7 nm from Heron Point Light.

   Plot the 1530 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  

8. At 1310 your fix is 071°T, 2.8 nm from Gannet Rock daybeacon. You steer 327°T at 4.6 kn through the water. At 1400 a new fix puts you 026°T, 1.8 nm from Tern Island tower.

   Plot the 1400 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