Worksheet 294 · Skill 5

Set and drift

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1. At 1220 your fix is 226°T, 1.4 nm from Gannet Rock daybeacon. You steer 262°T at 4.5 kn through the water. At 1250 a new fix puts you 356°T, 2.1 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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 0800 your fix is 072°T, 4.0 nm from Tern Island tower. You steer 184°T at 8.4 kn through the water. At 0840 a new fix puts you 303°T, 1.4 nm from Kittle water tank.

   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  

3. At 1145 your fix is 245°T, 3.4 nm from Tern Island tower. You steer 256°T at 5.8 kn through the water. At 1225 a new fix puts you 121°T, 2.2 nm from Westfield church spire.

   Plot the 1225 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  

4. At 1235 your fix is 230°T, 2.6 nm from Tern Island tower. You steer 114°T at 6.2 kn through the water. At 1325 a new fix puts you 287°T, 2.4 nm from Kittle water tank.

   Plot the 1325 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  

5. At 0920 your fix is 151°T, 1.6 nm from Gannet Rock daybeacon. You steer 274°T at 4.3 kn through the water. At 1040 a new fix puts you 052°T, 3.4 nm from Heron Point Light.

   Plot the 1040 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  

6. At 0720 your fix is 168°T, 1.4 nm from Tern Island tower. You steer 068°T at 4.8 kn through the water. At 0815 a new fix puts you 027°T, 3.3 nm from Gannet Rock daybeacon.

   Plot the 0815 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  

7. At 1415 your fix is 090°T, 1.8 nm from Gannet Rock daybeacon. You steer 222°T at 5.2 kn through the water. At 1455 a new fix puts you 062°T, 2.4 nm from Mill stack.

   Plot the 1455 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  

8. At 1510 your fix is 062°T, 3.5 nm from Westfield church spire. You steer 143°T at 5.4 kn through the water. At 1605 a new fix puts you 001°T, 3.0 nm from Mill stack.

   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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn