Worksheet 332 · Skill 5

Set and drift

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1. At 1050 your fix is 047°T, 3.2 nm from Heron Point Light. You steer 130°T at 6.6 kn through the water. At 1125 a new fix puts you 041°T, 2.3 nm from Mill stack.

   Plot the 1125 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 0715 your fix is 170°T, 1.3 nm from Gannet Rock daybeacon. You steer 254°T at 7.0 kn through the water. At 0755 a new fix puts you 350°T, 1.1 nm from Mill stack.

   Plot the 0755 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 0700 your fix is 242°T, 2.5 nm from Gannet Rock daybeacon. You steer 093°T at 4.6 kn through the water. At 0805 a new fix puts you 027°T, 2.2 nm from Kittle water tank.

   Plot the 0805 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  

4. At 1250 your fix is 039°T, 4.3 nm from Gannet Rock daybeacon. You steer 236°T at 4.8 kn through the water. At 1355 a new fix puts you 296°T, 0.9 nm from Gannet Rock daybeacon.

   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 65 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 0855 your fix is 074°T, 3.7 nm from Tern Island tower. You steer 202°T at 4.3 kn through the water. At 0930 a new fix puts you 057°T, 1.5 nm from Gannet Rock daybeacon.

   Plot the 0930 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  

6. At 1010 your fix is 041°T, 2.1 nm from Westfield church spire. You steer 126°T at 6.9 kn through the water. At 1110 a new fix puts you 255°T, 2.4 nm from Gannet Rock daybeacon.

   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  

7. At 0810 your fix is 123°T, 1.1 nm from Gannet Rock daybeacon. You steer 260°T at 6.4 kn through the water. At 0845 a new fix puts you 012°T, 2.2 nm from Mill stack.

   Plot the 0845 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 1335 your fix is 026°T, 2.0 nm from Heron Point Light. You steer 093°T at 5.9 kn through the water. At 1405 a new fix puts you 263°T, 3.1 nm from Gannet Rock daybeacon.

   Plot the 1405 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