Worksheet 568 · 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 1030 your fix is 187°T, 1.9 nm from Tern Island tower. You steer 285°T at 5.7 kn through the water. At 1125 a new fix puts you 347°T, 1.8 nm from Heron Point Light.

   Plot the 1125 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  

2. At 1445 your fix is 014°T, 1.4 nm from Gannet Rock daybeacon. You steer 132°T at 4.7 kn through the water. At 1515 a new fix puts you 070°T, 1.6 nm from Gannet Rock daybeacon.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 0810 your fix is 123°T, 1.4 nm from Westfield church spire. You steer 094°T at 5.8 kn through the water. At 0925 a new fix puts you 075°T, 2.2 nm from Gannet Rock daybeacon.

   Plot the 0925 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 75 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1010 your fix is 257°T, 3.3 nm from Tern Island tower. You steer 274°T at 4.7 kn through the water. At 1040 a new fix puts you 034°T, 0.9 nm from Westfield church spire.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 0930 your fix is 254°T, 2.7 nm from Tern Island tower. You steer 291°T at 7.3 kn through the water. At 1010 a new fix puts you 357°T, 1.3 nm from Westfield church spire.

   Plot the 1010 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  

6. At 0805 your fix is 058°T, 3.0 nm from Tern Island tower. You steer 260°T at 6.4 kn through the water. At 0930 a new fix puts you 356°T, 1.2 nm from Westfield church spire.

   Plot the 0930 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 85 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 1325 your fix is 086°T, 2.3 nm from Tern Island tower. You steer 156°T at 4.6 kn through the water. At 1405 a new fix puts you 090°T, 1.2 nm from Gannet Rock daybeacon.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1545 your fix is 259°T, 1.3 nm from Gannet Rock daybeacon. You steer 275°T at 4.5 kn through the water. At 1710 a new fix puts you 029°T, 1.4 nm from Heron Point Light.

   Plot the 1710 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 85 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn