Worksheet 453 · Skill 5

Set and drift

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1. At 1330 your fix is 114°T, 2.4 nm from Westfield church spire. You steer 080°T at 6.8 kn through the water. At 1445 a new fix puts you 046°T, 2.9 nm from Gannet Rock daybeacon.

   Plot the 1445 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 1010 your fix is 160°T, 1.6 nm from Westfield church spire. You steer 099°T at 5.2 kn through the water. At 1130 a new fix puts you 281°T, 2.3 nm from Kittle water tank.

   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 80 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1520 your fix is 102°T, 2.3 nm from Westfield church spire. You steer 049°T at 7.7 kn through the water. At 1550 a new fix puts you 285°T, 2.4 nm from Tern Island tower.

   Plot the 1550 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  

4. At 1135 your fix is 035°T, 3.1 nm from Gannet Rock daybeacon. You steer 302°T at 4.8 kn through the water. At 1205 a new fix puts you 049°T, 2.4 nm from Tern Island tower.

   Plot the 1205 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  

5. At 0920 your fix is 029°T, 2.6 nm from Kittle water tank. You steer 256°T at 5.4 kn through the water. At 1010 a new fix puts you 198°T, 1.7 nm from Gannet Rock daybeacon.

   Plot the 1010 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  

6. At 1545 your fix is 332°T, 2.0 nm from Tern Island tower. You steer 263°T at 6.6 kn through the water. At 1625 a new fix puts you 020°T, 3.4 nm from Westfield church spire.

   Plot the 1625 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 1430 your fix is 156°T, 1.2 nm from Westfield church spire. You steer 050°T at 4.9 kn through the water. At 1530 a new fix puts you 079°T, 3.4 nm from Westfield church spire.

   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 60 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 0925 your fix is 229°T, 3.5 nm from Tern Island tower. You steer 088°T at 7.9 kn through the water. At 0955 a new fix puts you 306°T, 1.6 nm from Gannet Rock daybeacon.

   Plot the 0955 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