Worksheet 652 · Skill 5

Set and drift

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1. At 0930 your fix is 011°T, 2.7 nm from Mill stack. You steer 048°T at 4.1 kn through the water. At 1030 a new fix puts you 004°T, 1.1 nm from Gannet Rock daybeacon.

   Plot the 1030 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 0920 your fix is 022°T, 2.4 nm from Gannet Rock daybeacon. You steer 229°T at 4.8 kn through the water. At 1035 a new fix puts you 048°T, 3.4 nm from Heron Point Light.

   Plot the 1035 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  

3. At 1235 your fix is 244°T, 2.9 nm from Tern Island tower. You steer 284°T at 4.8 kn through the water. At 1310 a new fix puts you 113°T, 2.4 nm from Westfield church spire.

   Plot the 1310 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  

4. At 0905 your fix is 072°T, 1.4 nm from Gannet Rock daybeacon. You steer 284°T at 7.2 kn through the water. At 1025 a new fix puts you 112°T, 2.0 nm from Westfield church spire.

   Plot the 1025 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  

5. At 1520 your fix is 193°T, 2.2 nm from Tern Island tower. You steer 309°T at 5.5 kn through the water. At 1605 a new fix puts you 282°T, 3.3 nm from Tern Island tower.

   Plot the 1605 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 1120 your fix is 018°T, 2.1 nm from Mill stack. You steer 321°T at 4.0 kn through the water. At 1220 a new fix puts you 032°T, 2.4 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 60 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1340 your fix is 311°T, 1.5 nm from Kittle water tank. You steer 044°T at 4.4 kn through the water. At 1415 a new fix puts you 026°T, 2.6 nm from Kittle water tank.

   Plot the 1415 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 1555 your fix is 286°T, 1.7 nm from Gannet Rock daybeacon. You steer 276°T at 7.5 kn through the water. At 1640 a new fix puts you 073°T, 2.8 nm from Westfield church spire.

   Plot the 1640 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