Worksheet 73 · 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 1520 your fix is 034°T, 1.8 nm from Heron Point Light. You steer 100°T at 8.3 kn through the water. At 1550 a new fix puts you 229°T, 1.9 nm from Gannet Rock daybeacon.

   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  

2. At 1025 your fix is 353°T, 1.2 nm from Tern Island tower. You steer 075°T at 6.1 kn through the water. At 1105 a new fix puts you 045°T, 3.0 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  

3. At 0735 your fix is 045°T, 3.3 nm from Gannet Rock daybeacon. You steer 190°T at 5.0 kn through the water. At 0805 a new fix puts you 087°T, 1.1 nm from Gannet Rock daybeacon.

   Plot the 0805 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 1115 your fix is 269°T, 2.1 nm from Tern Island tower. You steer 245°T at 4.7 kn through the water. At 1225 a new fix puts you 150°T, 0.8 nm from Westfield church spire.

   Plot the 1225 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  

5. At 1115 your fix is 214°T, 1.9 nm from Gannet Rock daybeacon. You steer 263°T at 5.7 kn through the water. At 1155 a new fix puts you 324°T, 1.3 nm from Mill stack.

   Plot the 1155 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  

6. At 1350 your fix is 030°T, 2.1 nm from Tern Island tower. You steer 116°T at 7.3 kn through the water. At 1420 a new fix puts you 051°T, 3.5 nm from Gannet Rock daybeacon.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1300 your fix is 077°T, 3.2 nm from Tern Island tower. You steer 154°T at 4.5 kn through the water. At 1340 a new fix puts you 100°T, 1.4 nm from Gannet Rock daybeacon.

   Plot the 1340 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 1020 your fix is 211°T, 2.3 nm from Tern Island tower. You steer 260°T at 7.3 kn through the water. At 1050 a new fix puts you 039°T, 2.1 nm from Heron Point Light.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn