Worksheet 308 · 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 0825 your fix is 079°T, 3.5 nm from Westfield church spire. You steer 037°T at 6.3 kn through the water. At 0855 a new fix puts you 299°T, 2.6 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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 0830 your fix is 242°T, 1.9 nm from Gannet Rock daybeacon. You steer 032°T at 5.7 kn through the water. At 0920 a new fix puts you 003°T, 1.7 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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1155 your fix is 061°T, 3.9 nm from Tern Island tower. You steer 216°T at 4.6 kn through the water. At 1325 a new fix puts you 166°T, 1.0 nm from Gannet Rock daybeacon.

   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 90 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 0805 your fix is 312°T, 1.8 nm from Tern Island tower. You steer 191°T at 9.0 kn through the water. At 0835 a new fix puts you 228°T, 3.1 nm from Tern Island tower.

   Plot the 0835 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 1130 your fix is 018°T, 2.4 nm from Gannet Rock daybeacon. You steer 220°T at 4.8 kn through the water. At 1230 a new fix puts you 018°T, 2.5 nm from Mill stack.

   Plot the 1230 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  

6. At 1505 your fix is 073°T, 3.6 nm from Westfield church spire. You steer 068°T at 5.8 kn through the water. At 1555 a new fix puts you 333°T, 2.1 nm from Tern Island tower.

   Plot the 1555 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  

7. At 1100 your fix is 333°T, 2.5 nm from Mill stack. You steer 335°T at 4.5 kn through the water. At 1150 a new fix puts you 240°T, 3.1 nm from Tern Island tower.

   Plot the 1150 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  

8. At 0805 your fix is 015°T, 2.5 nm from Heron Point Light. You steer 100°T at 5.9 kn through the water. At 0840 a new fix puts you 056°T, 3.5 nm from Heron Point Light.

   Plot the 0840 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