Worksheet 829 · 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 0805 your fix is 278°T, 2.4 nm from Tern Island tower. You steer 169°T at 5.1 kn through the water. At 0855 a new fix puts you 216°T, 3.0 nm from Tern Island tower.

   Plot the 0855 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  

2. At 1005 your fix is 263°T, 3.4 nm from Tern Island tower. You steer 055°T at 5.4 kn through the water. At 1040 a new fix puts you 318°T, 1.5 nm from Tern Island tower.

   Plot the 1040 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 1405 your fix is 032°T, 3.7 nm from Westfield church spire. You steer 168°T at 4.1 kn through the water. At 1435 a new fix puts you 077°T, 2.6 nm from Westfield church spire.

   Plot the 1435 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 1205 your fix is 140°T, 1.5 nm from Tern Island tower. You steer 096°T at 4.6 kn through the water. At 1235 a new fix puts you 034°T, 2.3 nm from Gannet Rock daybeacon.

   Plot the 1235 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 1325 your fix is 284°T, 2.1 nm from Tern Island tower. You steer 054°T at 4.2 kn through the water. At 1355 a new fix puts you 326°T, 2.1 nm from Tern Island tower.

   Plot the 1355 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 1105 your fix is 075°T, 2.6 nm from Westfield church spire. You steer 133°T at 8.6 kn through the water. At 1145 a new fix puts you 226°T, 2.2 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  

7. At 1050 your fix is 048°T, 3.1 nm from Gannet Rock daybeacon. You steer 252°T at 7.7 kn through the water. At 1155 a new fix puts you 234°T, 3.4 nm from Tern Island tower.

   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 65 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1415 your fix is 005°T, 2.7 nm from Westfield church spire. You steer 115°T at 7.1 kn through the water. At 1455 a new fix puts you 258°T, 2.5 nm from Tern Island tower.

   Plot the 1455 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