Worksheet 292 · Skill 5

Set and drift

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1. At 0845 your fix is 074°T, 2.6 nm from Tern Island tower. You steer 212°T at 5.4 kn through the water. At 1000 a new fix puts you 000°T, 2.2 nm from Mill stack.

   Plot the 1000 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 1000 your fix is 123°T, 1.3 nm from Gannet Rock daybeacon. You steer 351°T at 6.5 kn through the water. At 1050 a new fix puts you 044°T, 1.5 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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1155 your fix is 011°T, 1.6 nm from Gannet Rock daybeacon. You steer 229°T at 4.2 kn through the water. At 1300 a new fix puts you 091°T, 2.1 nm from Heron Point Light.

   Plot the 1300 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  

4. At 0805 your fix is 271°T, 3.4 nm from Tern Island tower. You steer 211°T at 4.3 kn through the water. At 0905 a new fix puts you 042°T, 1.0 nm from Heron Point Light.

   Plot the 0905 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  

5. At 1100 your fix is 042°T, 3.4 nm from Westfield church spire. You steer 175°T at 5.9 kn through the water. At 1130 a new fix puts you 093°T, 2.7 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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1120 your fix is 050°T, 2.4 nm from Westfield church spire. You steer 143°T at 4.6 kn through the water. At 1210 a new fix puts you 088°T, 3.6 nm from Westfield church spire.

   Plot the 1210 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 1410 your fix is 321°T, 1.3 nm from Gannet Rock daybeacon. You steer 106°T at 5.2 kn through the water. At 1450 a new fix puts you 040°T, 2.6 nm from Kittle water tank.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 0715 your fix is 292°T, 2.1 nm from Tern Island tower. You steer 067°T at 7.9 kn through the water. At 0745 a new fix puts you 049°T, 2.4 nm from Tern Island tower.

   Plot the 0745 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