Worksheet 115 · 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 1600 your fix is 183°T, 1.6 nm from Tern Island tower. You steer 081°T at 8.0 kn through the water. At 1635 a new fix puts you 056°T, 2.9 nm from Gannet Rock daybeacon.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 1225 your fix is 188°T, 1.8 nm from Tern Island tower. You steer 319°T at 4.0 kn through the water. At 1325 a new fix puts you 287°T, 2.4 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 60 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1010 your fix is 291°T, 3.2 nm from Tern Island tower. You steer 202°T at 4.4 kn through the water. At 1110 a new fix puts you 041°T, 1.9 nm from Heron Point Light.

   Plot the 1110 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  

4. At 0935 your fix is 070°T, 2.3 nm from Westfield church spire. You steer 086°T at 5.6 kn through the water. At 1015 a new fix puts you 236°T, 1.6 nm from Tern Island tower.

   Plot the 1015 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  

5. At 0945 your fix is 028°T, 4.0 nm from Westfield church spire. You steer 162°T at 4.8 kn through the water. At 1045 a new fix puts you 266°T, 3.6 nm from Tern Island tower.

   Plot the 1045 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 0910 your fix is 057°T, 3.1 nm from Heron Point Light. You steer 002°T at 4.9 kn through the water. At 0950 a new fix puts you 269°T, 3.7 nm from Tern Island tower.

   Plot the 0950 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 1130 your fix is 051°T, 1.9 nm from Westfield church spire. You steer 094°T at 7.9 kn through the water. At 1200 a new fix puts you 230°T, 1.7 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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1405 your fix is 171°T, 1.0 nm from Gannet Rock daybeacon. You steer 262°T at 6.5 kn through the water. At 1505 a new fix puts you 314°T, 1.3 nm from Mill stack.

   Plot the 1505 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