Worksheet 710 · 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 0900 your fix is 029°T, 3.7 nm from Westfield church spire. You steer 183°T at 8.2 kn through the water. At 0930 a new fix puts you 121°T, 1.5 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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 1100 your fix is 023°T, 2.0 nm from Mill stack. You steer 325°T at 6.6 kn through the water. At 1130 a new fix puts you 089°T, 3.6 nm from Westfield church spire.

   Plot the 1130 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 0850 your fix is 240°T, 2.4 nm from Gannet Rock daybeacon. You steer 110°T at 4.1 kn through the water. At 0920 a new fix puts you 224°T, 1.8 nm from Gannet Rock daybeacon.

   Plot the 0920 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 1550 your fix is 080°T, 3.0 nm from Tern Island tower. You steer 222°T at 6.8 kn through the water. At 1700 a new fix puts you 330°T, 1.7 nm from Mill stack.

   Plot the 1700 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  

5. At 1120 your fix is 039°T, 0.9 nm from Gannet Rock daybeacon. You steer 256°T at 6.6 kn through the water. At 1225 a new fix puts you 074°T, 1.3 nm from Heron Point Light.

   Plot the 1225 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  

6. At 0710 your fix is 232°T, 3.0 nm from Tern Island tower. You steer 304°T at 4.4 kn through the water. At 0805 a new fix puts you 066°T, 0.9 nm from Westfield church spire.

   Plot the 0805 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  

7. At 0825 your fix is 352°T, 3.1 nm from Mill stack. You steer 320°T at 6.4 kn through the water. At 0855 a new fix puts you 062°T, 2.6 nm from Westfield church spire.

   Plot the 0855 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  

8. At 1255 your fix is 021°T, 2.1 nm from Kittle water tank. You steer 241°T at 4.2 kn through the water. At 1340 a new fix puts you 280°T, 2.5 nm from Kittle water tank.

   Plot the 1340 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