Worksheet 39 · 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 031°T, 2.6 nm from Kittle water tank. You steer 342°T at 5.7 kn through the water. At 1205 a new fix puts you 033°T, 3.8 nm from Gannet Rock daybeacon.

   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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 1135 your fix is 318°T, 1.5 nm from Tern Island tower. You steer 249°T at 4.0 kn through the water. At 1230 a new fix puts you 055°T, 3.2 nm from Westfield church spire.

   Plot the 1230 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  

3. At 0725 your fix is 075°T, 3.2 nm from Westfield church spire. You steer 091°T at 4.8 kn through the water. At 0755 a new fix puts you 254°T, 1.5 nm from Tern Island tower.

   Plot the 0755 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 1140 your fix is 075°T, 3.5 nm from Westfield church spire. You steer 123°T at 8.3 kn through the water. At 1235 a new fix puts you 003°T, 1.4 nm from Kittle water tank.

   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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1125 your fix is 201°T, 1.7 nm from Tern Island tower. You steer 088°T at 6.6 kn through the water. At 1200 a new fix puts you 079°T, 2.4 nm from Gannet Rock daybeacon.

   Plot the 1200 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 1505 your fix is 237°T, 2.0 nm from Tern Island tower. You steer 315°T at 5.9 kn through the water. At 1535 a new fix puts you 048°T, 3.7 nm from Westfield church spire.

   Plot the 1535 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 1410 your fix is 205°T, 1.5 nm from Gannet Rock daybeacon. You steer 276°T at 8.8 kn through the water. At 1445 a new fix puts you 052°T, 2.7 nm from Heron Point Light.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1500 your fix is 087°T, 1.8 nm from Tern Island tower. You steer 070°T at 4.5 kn through the water. At 1530 a new fix puts you 068°T, 4.0 nm from Tern Island tower.

   Plot the 1530 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