Worksheet 701 · Skill 5

Set and drift

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1. At 1010 your fix is 309°T, 2.0 nm from Tern Island tower. You steer 078°T at 5.1 kn through the water. At 1105 a new fix puts you 036°T, 4.3 nm from Gannet Rock daybeacon.

   Plot the 1105 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  

2. At 0700 your fix is 067°T, 2.8 nm from Tern Island tower. You steer 157°T at 5.8 kn through the water. At 0735 a new fix puts you 059°T, 2.8 nm from Gannet Rock daybeacon.

   Plot the 0735 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  

3. At 1300 your fix is 051°T, 2.0 nm from Gannet Rock daybeacon. You steer 351°T at 5.1 kn through the water. At 1335 a new fix puts you 070°T, 4.1 nm from Tern Island tower.

   Plot the 1335 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 1140 your fix is 027°T, 3.3 nm from Heron Point Light. You steer 030°T at 4.3 kn through the water. At 1230 a new fix puts you 301°T, 2.9 nm from Tern Island tower.

   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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 0820 your fix is 061°T, 3.4 nm from Heron Point Light. You steer 073°T at 6.5 kn through the water. At 0855 a new fix puts you 018°T, 1.0 nm from Gannet Rock daybeacon.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 0940 your fix is 047°T, 3.4 nm from Westfield church spire. You steer 149°T at 5.4 kn through the water. At 1010 a new fix puts you 080°T, 3.0 nm from Westfield church spire.

   Plot the 1010 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  

7. At 1145 your fix is 332°T, 2.9 nm from Kittle water tank. You steer 262°T at 5.0 kn through the water. At 1240 a new fix puts you 351°T, 1.8 nm from Mill stack.

   Plot the 1240 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  

8. At 1000 your fix is 041°T, 2.5 nm from Tern Island tower. You steer 277°T at 8.4 kn through the water. At 1030 a new fix puts you 305°T, 3.3 nm from Tern Island tower.

   Plot the 1030 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