Worksheet 516 · 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 1535 your fix is 070°T, 2.6 nm from Gannet Rock daybeacon. You steer 224°T at 6.7 kn through the water. At 1605 a new fix puts you 340°T, 0.9 nm from Kittle water tank.

   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  

2. At 1115 your fix is 301°T, 3.5 nm from Tern Island tower. You steer 178°T at 7.6 kn through the water. At 1200 a new fix puts you 346°T, 1.5 nm from Mill stack.

   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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1350 your fix is 271°T, 2.0 nm from Gannet Rock daybeacon. You steer 245°T at 6.8 kn through the water. At 1420 a new fix puts you 331°T, 1.9 nm from Mill stack.

   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  

4. At 1440 your fix is 051°T, 4.0 nm from Tern Island tower. You steer 213°T at 4.8 kn through the water. At 1510 a new fix puts you 098°T, 1.9 nm from Tern Island tower.

   Plot the 1510 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 0810 your fix is 277°T, 3.2 nm from Tern Island tower. You steer 068°T at 4.9 kn through the water. At 0900 a new fix puts you 015°T, 2.6 nm from Tern Island tower.

   Plot the 0900 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  

6. At 1240 your fix is 071°T, 2.8 nm from Tern Island tower. You steer 158°T at 8.5 kn through the water. At 1315 a new fix puts you 035°T, 3.1 nm from Kittle water tank.

   Plot the 1315 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 1050 your fix is 307°T, 3.1 nm from Tern Island tower. You steer 191°T at 4.9 kn through the water. At 1145 a new fix puts you 046°T, 1.0 nm from Heron Point Light.

   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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1115 your fix is 013°T, 3.3 nm from Westfield church spire. You steer 094°T at 8.3 kn through the water. At 1155 a new fix puts you 330°T, 1.7 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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn