Worksheet 145 · 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 1240 your fix is 247°T, 2.6 nm from Gannet Rock daybeacon. You steer 308°T at 4.2 kn through the water. At 1325 a new fix puts you 235°T, 3.2 nm from Tern Island tower.

   Plot the 1325 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  

2. At 1205 your fix is 321°T, 1.8 nm from Tern Island tower. You steer 216°T at 5.8 kn through the water. At 1255 a new fix puts you 221°T, 3.2 nm from Tern Island tower.

   Plot the 1255 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  

3. At 1055 your fix is 027°T, 2.1 nm from Heron Point Light. You steer 356°T at 4.0 kn through the water. At 1130 a new fix puts you 063°T, 1.9 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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1450 your fix is 207°T, 2.1 nm from Tern Island tower. You steer 291°T at 4.1 kn through the water. At 1550 a new fix puts you 348°T, 1.9 nm from Heron Point Light.

   Plot the 1550 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  

5. At 0800 your fix is 050°T, 3.0 nm from Gannet Rock daybeacon. You steer 295°T at 6.0 kn through the water. At 0850 a new fix puts you 343°T, 2.2 nm from Tern Island tower.

   Plot the 0850 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 1140 your fix is 230°T, 2.5 nm from Gannet Rock daybeacon. You steer 323°T at 6.2 kn through the water. At 1215 a new fix puts you 252°T, 2.6 nm from Tern Island tower.

   Plot the 1215 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 0850 your fix is 304°T, 4.4 nm from Tern Island tower. You steer 195°T at 6.4 kn through the water. At 0920 a new fix puts you 070°T, 2.4 nm from Westfield church spire.

   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  

8. At 1245 your fix is 008°T, 2.2 nm from Heron Point Light. You steer 052°T at 6.1 kn through the water. At 1340 a new fix puts you 300°T, 3.2 nm from Tern Island tower.

   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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn