Worksheet 431 · 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 1250 your fix is 248°T, 2.4 nm from Gannet Rock daybeacon. You steer 039°T at 7.4 kn through the water. At 1320 a new fix puts you 337°T, 1.2 nm from Gannet Rock daybeacon.

   Plot the 1320 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 0705 your fix is 062°T, 2.7 nm from Tern Island tower. You steer 284°T at 5.6 kn through the water. At 0735 a new fix puts you 338°T, 2.1 nm from Tern Island tower.

   Plot the 0735 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 1350 your fix is 011°T, 3.2 nm from Westfield church spire. You steer 142°T at 6.3 kn through the water. At 1500 a new fix puts you 238°T, 2.6 nm from Gannet Rock daybeacon.

   Plot the 1500 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 70 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1235 your fix is 343°T, 2.4 nm from Mill stack. You steer 320°T at 7.1 kn through the water. At 1330 a new fix puts you 049°T, 2.1 nm from Westfield church spire.

   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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1225 your fix is 008°T, 1.9 nm from Kittle water tank. You steer 271°T at 8.3 kn through the water. At 1320 a new fix puts you 039°T, 2.2 nm from Heron Point Light.

   Plot the 1320 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 1545 your fix is 283°T, 1.5 nm from Gannet Rock daybeacon. You steer 066°T at 7.1 kn through the water. At 1625 a new fix puts you 074°T, 2.9 nm from Gannet Rock daybeacon.

   Plot the 1625 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  

7. At 0905 your fix is 070°T, 3.3 nm from Westfield church spire. You steer 136°T at 4.2 kn through the water. At 1005 a new fix puts you 254°T, 2.5 nm from Gannet Rock daybeacon.

   Plot the 1005 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 60 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1510 your fix is 044°T, 1.3 nm from Kittle water tank. You steer 011°T at 7.3 kn through the water. At 1540 a new fix puts you 050°T, 3.5 nm from Gannet Rock daybeacon.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn