Worksheet 452 · Skill 5

Set and drift

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1. At 1525 your fix is 119°T, 1.8 nm from Gannet Rock daybeacon. You steer 253°T at 6.5 kn through the water. At 1555 a new fix puts you 058°T, 2.4 nm from Mill stack.

   Plot the 1555 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  

2. At 0825 your fix is 358°T, 2.3 nm from Mill stack. You steer 097°T at 4.2 kn through the water. At 0910 a new fix puts you 220°T, 1.2 nm from Gannet Rock daybeacon.

   Plot the 0910 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  

3. At 1205 your fix is 028°T, 3.8 nm from Westfield church spire. You steer 134°T at 8.0 kn through the water. At 1250 a new fix puts you 010°T, 3.0 nm from Mill stack.

   Plot the 1250 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  

4. At 1530 your fix is 353°T, 1.9 nm from Mill stack. You steer 292°T at 6.9 kn through the water. At 1605 a new fix puts you 004°T, 2.2 nm from Heron Point Light.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 0940 your fix is 328°T, 1.9 nm from Heron Point Light. You steer 018°T at 4.6 kn through the water. At 1015 a new fix puts you 052°T, 2.2 nm from Westfield church spire.

   Plot the 1015 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  

6. At 1120 your fix is 354°T, 1.7 nm from Mill stack. You steer 073°T at 7.8 kn through the water. At 1205 a new fix puts you 036°T, 2.7 nm from Kittle water tank.

   Plot the 1205 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  

7. At 1110 your fix is 022°T, 0.8 nm from Heron Point Light. You steer 091°T at 7.5 kn through the water. At 1215 a new fix puts you 108°T, 1.4 nm from Gannet Rock daybeacon.

   Plot the 1215 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  

8. At 1035 your fix is 013°T, 3.5 nm from Westfield church spire. You steer 141°T at 4.7 kn through the water. At 1105 a new fix puts you 048°T, 2.8 nm from Westfield church spire.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn