Worksheet 436 · 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 1115 your fix is 163°T, 1.7 nm from Westfield church spire. You steer 057°T at 6.5 kn through the water. At 1145 a new fix puts you 103°T, 2.8 nm from Westfield church spire.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 1440 your fix is 074°T, 3.7 nm from Westfield church spire. You steer 194°T at 5.3 kn through the water. At 1515 a new fix puts you 341°T, 0.9 nm from Heron Point Light.

   Plot the 1515 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 0855 your fix is 267°T, 2.2 nm from Tern Island tower. You steer 317°T at 4.6 kn through the water. At 0940 a new fix puts you 302°T, 3.3 nm from Tern Island tower.

   Plot the 0940 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 0920 your fix is 359°T, 1.0 nm from Kittle water tank. You steer 012°T at 5.5 kn through the water. At 1025 a new fix puts you 067°T, 4.6 nm from Tern Island tower.

   Plot the 1025 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  

5. At 1400 your fix is 236°T, 1.8 nm from Tern Island tower. You steer 230°T at 4.6 kn through the water. At 1455 a new fix puts you 030°T, 1.7 nm from Heron Point Light.

   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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1220 your fix is 038°T, 1.1 nm from Gannet Rock daybeacon. You steer 336°T at 6.1 kn through the water. At 1305 a new fix puts you 046°T, 3.0 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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1300 your fix is 156°T, 1.6 nm from Gannet Rock daybeacon. You steer 289°T at 4.2 kn through the water. At 1405 a new fix puts you 054°T, 3.5 nm from Heron Point Light.

   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 65 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1400 your fix is 173°T, 1.1 nm from Gannet Rock daybeacon. You steer 288°T at 4.5 kn through the water. At 1445 a new fix puts you 250°T, 1.9 nm from Gannet Rock daybeacon.

   Plot the 1445 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