Worksheet 296 · Skill 5

Set and drift

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1. At 1445 your fix is 030°T, 2.3 nm from Mill stack. You steer 306°T at 6.1 kn through the water. At 1600 a new fix puts you 075°T, 1.2 nm from Westfield church spire.

   Plot the 1600 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  

2. At 1005 your fix is 258°T, 1.9 nm from Gannet Rock daybeacon. You steer 312°T at 5.0 kn through the water. At 1130 a new fix puts you 356°T, 1.8 nm from Westfield church spire.

   Plot the 1130 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 85 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 0715 your fix is 046°T, 3.0 nm from Westfield church spire. You steer 187°T at 6.9 kn through the water. At 0750 a new fix puts you 339°T, 1.6 nm from Heron Point Light.

   Plot the 0750 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 1335 your fix is 047°T, 1.6 nm from Gannet Rock daybeacon. You steer 001°T at 4.1 kn through the water. At 1415 a new fix puts you 067°T, 2.9 nm from Tern Island tower.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1045 your fix is 073°T, 1.5 nm from Westfield church spire. You steer 064°T at 6.1 kn through the water. At 1140 a new fix puts you 308°T, 2.4 nm from Tern Island tower.

   Plot the 1140 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  

6. At 1450 your fix is 298°T, 4.0 nm from Tern Island tower. You steer 148°T at 5.3 kn through the water. At 1530 a new fix puts you 195°T, 1.8 nm from Tern Island tower.

   Plot the 1530 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  

7. At 0955 your fix is 052°T, 2.1 nm from Westfield church spire. You steer 105°T at 8.5 kn through the water. At 1045 a new fix puts you 138°T, 2.4 nm from Tern Island tower.

   Plot the 1045 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  

8. At 1545 your fix is 005°T, 2.2 nm from Tern Island tower. You steer 216°T at 7.9 kn through the water. At 1615 a new fix puts you 269°T, 1.9 nm from Tern Island tower.

   Plot the 1615 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