Worksheet 232 · 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 1045 your fix is 347°T, 1.4 nm from Gannet Rock daybeacon. You steer 232°T at 4.3 kn through the water. At 1200 a new fix puts you 221°T, 3.5 nm from Tern Island tower.

   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 75 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 0745 your fix is 037°T, 1.8 nm from Heron Point Light. You steer 293°T at 4.4 kn through the water. At 0825 a new fix puts you 333°T, 1.9 nm from Heron Point Light.

   Plot the 0825 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  

3. At 1555 your fix is 269°T, 2.1 nm from Tern Island tower. You steer 130°T at 4.4 kn through the water. At 1635 a new fix puts you 217°T, 2.4 nm from Tern Island tower.

   Plot the 1635 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  

4. At 1400 your fix is 158°T, 1.2 nm from Gannet Rock daybeacon. You steer 296°T at 7.9 kn through the water. At 1445 a new fix puts you 272°T, 3.0 nm from Tern Island tower.

   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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1325 your fix is 261°T, 1.4 nm from Tern Island tower. You steer 197°T at 5.2 kn through the water. At 1355 a new fix puts you 064°T, 3.1 nm from Heron Point Light.

   Plot the 1355 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  

6. At 1020 your fix is 172°T, 1.3 nm from Gannet Rock daybeacon. You steer 100°T at 4.3 kn through the water. At 1050 a new fix puts you 042°T, 1.0 nm from Kittle water tank.

   Plot the 1050 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 1315 your fix is 347°T, 1.1 nm from Heron Point Light. You steer 072°T at 4.7 kn through the water. At 1400 a new fix puts you 355°T, 2.5 nm from Mill stack.

   Plot the 1400 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  

8. At 0815 your fix is 008°T, 2.4 nm from Tern Island tower. You steer 252°T at 7.0 kn through the water. At 0855 a new fix puts you 270°T, 3.4 nm from Tern Island tower.

   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 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn