Worksheet 388 · Skill 5

Set and drift

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1. At 1440 your fix is 058°T, 3.9 nm from Tern Island tower. You steer 218°T at 6.7 kn through the water. At 1510 a new fix puts you 004°T, 1.2 nm from Gannet Rock daybeacon.

   Plot the 1510 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 1330 your fix is 047°T, 3.7 nm from Gannet Rock daybeacon. You steer 298°T at 4.2 kn through the water. At 1420 a new fix puts you 049°T, 1.7 nm from Tern Island tower.

   Plot the 1420 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 0905 your fix is 059°T, 3.4 nm from Gannet Rock daybeacon. You steer 250°T at 8.1 kn through the water. At 1015 a new fix puts you 044°T, 1.5 nm from Heron Point Light.

   Plot the 1015 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 70 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1150 your fix is 236°T, 1.4 nm from Tern Island tower. You steer 241°T at 4.2 kn through the water. At 1240 a new fix puts you 140°T, 1.7 nm from Westfield church spire.

   Plot the 1240 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 1135 your fix is 335°T, 1.2 nm from Heron Point Light. You steer 359°T at 6.1 kn through the water. At 1210 a new fix puts you 073°T, 1.8 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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1105 your fix is 110°T, 1.4 nm from Gannet Rock daybeacon. You steer 332°T at 8.3 kn through the water. At 1150 a new fix puts you 018°T, 2.6 nm from Tern Island tower.

   Plot the 1150 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  

7. At 1050 your fix is 357°T, 2.1 nm from Westfield church spire. You steer 146°T at 5.8 kn through the water. At 1140 a new fix puts you 041°T, 1.0 nm from Heron Point Light.

   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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1105 your fix is 069°T, 3.6 nm from Tern Island tower. You steer 165°T at 6.5 kn through the water. At 1145 a new fix puts you 105°T, 2.1 nm from Gannet Rock daybeacon.

   Plot the 1145 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