Worksheet 699 · Skill 5

Set and drift

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1. At 1210 your fix is 253°T, 1.6 nm from Gannet Rock daybeacon. You steer 287°T at 8.8 kn through the water. At 1250 a new fix puts you 149°T, 1.2 nm from Westfield church spire.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 1055 your fix is 026°T, 3.7 nm from Westfield church spire. You steer 185°T at 7.9 kn through the water. At 1135 a new fix puts you 014°T, 2.4 nm from Heron Point Light.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1315 your fix is 238°T, 2.3 nm from Gannet Rock daybeacon. You steer 298°T at 7.5 kn through the water. At 1410 a new fix puts you 064°T, 2.7 nm from Westfield church spire.

   Plot the 1410 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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1355 your fix is 318°T, 1.9 nm from Tern Island tower. You steer 196°T at 4.8 kn through the water. At 1435 a new fix puts you 032°T, 3.7 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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 0800 your fix is 007°T, 2.1 nm from Westfield church spire. You steer 156°T at 7.1 kn through the water. At 0840 a new fix puts you 004°T, 0.8 nm from Heron Point Light.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1335 your fix is 218°T, 2.1 nm from Gannet Rock daybeacon. You steer 291°T at 4.9 kn through the water. At 1425 a new fix puts you 090°T, 3.5 nm from Westfield church spire.

   Plot the 1425 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 1200 your fix is 055°T, 0.8 nm from Heron Point Light. You steer 071°T at 5.6 kn through the water. At 1235 a new fix puts you 350°T, 2.7 nm from Mill stack.

   Plot the 1235 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 0915 your fix is 001°T, 1.8 nm from Kittle water tank. You steer 270°T at 6.5 kn through the water. At 1025 a new fix puts you 093°T, 3.5 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 70 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn