Worksheet 421 · 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 1225 your fix is 018°T, 2.7 nm from Mill stack. You steer 042°T at 5.4 kn through the water. At 1305 a new fix puts you 132°T, 2.6 nm from Tern Island tower.

   Plot the 1305 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  

2. At 1255 your fix is 191°T, 1.9 nm from Tern Island tower. You steer 248°T at 7.2 kn through the water. At 1330 a new fix puts you 057°T, 1.8 nm from Heron Point Light.

   Plot the 1330 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 1435 your fix is 283°T, 1.9 nm from Tern Island tower. You steer 272°T at 8.1 kn through the water. At 1505 a new fix puts you 036°T, 1.0 nm from Westfield church spire.

   Plot the 1505 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 1045 your fix is 194°T, 1.7 nm from Tern Island tower. You steer 236°T at 8.8 kn through the water. At 1115 a new fix puts you 074°T, 1.9 nm from Heron Point Light.

   Plot the 1115 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 1120 your fix is 057°T, 3.0 nm from Gannet Rock daybeacon. You steer 317°T at 5.6 kn through the water. At 1205 a new fix puts you 023°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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1505 your fix is 040°T, 1.1 nm from Westfield church spire. You steer 154°T at 8.1 kn through the water. At 1540 a new fix puts you 008°T, 1.1 nm from Heron Point Light.

   Plot the 1540 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  

7. At 1145 your fix is 225°T, 1.1 nm from Gannet Rock daybeacon. You steer 253°T at 7.2 kn through the water. At 1220 a new fix puts you 101°T, 1.8 nm from Heron Point Light.

   Plot the 1220 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  

8. At 1535 your fix is 214°T, 2.9 nm from Tern Island tower. You steer 263°T at 4.4 kn through the water. At 1605 a new fix puts you 049°T, 2.6 nm from Heron Point Light.

   Plot the 1605 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