Worksheet 171 · Skill 5

Set and drift

Print this worksheet Next sheet

Plot Pass worksheet. Plot Pass $1.95/month or $19.50/year · Free during preview. Plotroom · cedarpointmarina.net · invented chart, not for navigation.

1. At 1340 your fix is 021°T, 3.8 nm from Westfield church spire. You steer 172°T at 6.3 kn through the water. At 1410 a new fix puts you 091°T, 2.6 nm from Westfield church spire.

   Plot the 1410 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 1100 your fix is 036°T, 2.4 nm from Heron Point Light. You steer 033°T at 4.5 kn through the water. At 1135 a new fix puts you 284°T, 3.4 nm from Tern Island tower.

   Plot the 1135 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  

3. At 0735 your fix is 264°T, 3.0 nm from Gannet Rock daybeacon. You steer 333°T at 5.6 kn through the water. At 0820 a new fix puts you 281°T, 2.5 nm from Tern Island tower.

   Plot the 0820 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  

4. At 1330 your fix is 297°T, 3.5 nm from Tern Island tower. You steer 149°T at 6.6 kn through the water. At 1405 a new fix puts you 223°T, 2.2 nm from Tern Island tower.

   Plot the 1405 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  

5. At 0840 your fix is 352°T, 1.1 nm from Kittle water tank. You steer 284°T at 5.1 kn through the water. At 0915 a new fix puts you 240°T, 2.6 nm from Gannet Rock daybeacon.

   Plot the 0915 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 1520 your fix is 045°T, 1.6 nm from Kittle water tank. You steer 334°T at 4.6 kn through the water. At 1600 a new fix puts you 343°T, 2.7 nm from Kittle water tank.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1215 your fix is 006°T, 1.4 nm from Heron Point Light. You steer 045°T at 5.0 kn through the water. At 1310 a new fix puts you 247°T, 1.7 nm from Tern Island tower.

   Plot the 1310 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  

8. At 1025 your fix is 319°T, 2.3 nm from Tern Island tower. You steer 219°T at 4.2 kn through the water. At 1105 a new fix puts you 258°T, 3.1 nm from Tern Island tower.

   Plot the 1105 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