Worksheet 150 · 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 1050 your fix is 005°T, 2.7 nm from Westfield church spire. You steer 130°T at 8.8 kn through the water. At 1155 a new fix puts you 314°T, 1.1 nm from Kittle water tank.

   Plot the 1155 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  

2. At 1305 your fix is 214°T, 3.3 nm from Tern Island tower. You steer 337°T at 4.1 kn through the water. At 1355 a new fix puts you 076°T, 3.6 nm from Westfield church spire.

   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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1110 your fix is 241°T, 1.1 nm from Gannet Rock daybeacon. You steer 286°T at 5.1 kn through the water. At 1235 a new fix puts you 032°T, 1.4 nm from Heron Point Light.

   Plot the 1235 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 85 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1535 your fix is 080°T, 2.3 nm from Gannet Rock daybeacon. You steer 335°T at 8.8 kn through the water. At 1610 a new fix puts you 035°T, 2.5 nm from Tern Island tower.

   Plot the 1610 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  

5. At 1205 your fix is 352°T, 2.3 nm from Tern Island tower. You steer 207°T at 5.6 kn through the water. At 1245 a new fix puts you 257°T, 2.4 nm from Tern Island tower.

   Plot the 1245 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  

6. At 0735 your fix is 285°T, 3.4 nm from Tern Island tower. You steer 142°T at 4.0 kn through the water. At 0810 a new fix puts you 205°T, 1.6 nm from Tern Island tower.

   Plot the 0810 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 0735 your fix is 351°T, 3.0 nm from Mill stack. You steer 338°T at 7.3 kn through the water. At 0810 a new fix puts you 053°T, 3.5 nm from Westfield church spire.

   Plot the 0810 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  

8. At 1435 your fix is 202°T, 1.9 nm from Tern Island tower. You steer 069°T at 6.2 kn through the water. At 1520 a new fix puts you 029°T, 2.7 nm from Gannet Rock daybeacon.

   Plot the 1520 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