Worksheet 293 · Skill 5

Set and drift

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1. At 1420 your fix is 257°T, 2.5 nm from Gannet Rock daybeacon. You steer 260°T at 6.3 kn through the water. At 1450 a new fix puts you 075°T, 2.0 nm from Heron Point Light.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 1015 your fix is 048°T, 3.8 nm from Gannet Rock daybeacon. You steer 299°T at 6.4 kn through the water. At 1050 a new fix puts you 047°T, 1.9 nm from Tern Island tower.

   Plot the 1050 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  

3. At 1245 your fix is 016°T, 3.3 nm from Westfield church spire. You steer 104°T at 5.5 kn through the water. At 1335 a new fix puts you 291°T, 1.4 nm from Tern Island tower.

   Plot the 1335 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  

4. At 1430 your fix is 053°T, 3.3 nm from Gannet Rock daybeacon. You steer 188°T at 6.2 kn through the water. At 1505 a new fix puts you 074°T, 1.9 nm from Kittle water tank.

   Plot the 1505 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 1435 your fix is 045°T, 4.1 nm from Gannet Rock daybeacon. You steer 203°T at 4.2 kn through the water. At 1535 a new fix puts you 105°T, 2.4 nm from Gannet Rock daybeacon.

   Plot the 1535 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  

6. At 1420 your fix is 228°T, 1.9 nm from Gannet Rock daybeacon. You steer 304°T at 7.8 kn through the water. At 1450 a new fix puts you 232°T, 2.8 nm from Tern Island tower.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1010 your fix is 021°T, 2.4 nm from Gannet Rock daybeacon. You steer 143°T at 5.1 kn through the water. At 1055 a new fix puts you 043°T, 2.1 nm from Kittle water tank.

   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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1140 your fix is 097°T, 3.3 nm from Westfield church spire. You steer 179°T at 5.2 kn through the water. At 1215 a new fix puts you 105°T, 1.4 nm from Heron Point Light.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn