Worksheet 210 · Skill 3

Dead reckoning

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 1125 you fix your position 027°T, 2.6 nm from Westfield church spire. You steer 123°T at 5.5 kn until 1145, then 263°T at 4.2 kn until 1220.

   Give the 1220 DR position as the true bearing FROM Westfield church spire to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Westfield church spire: ________ °T   Distance: ________ nm  

2. At 0725 you fix your position 349°T, 1.0 nm from Kittle water tank. You steer 278°T at 5.5 kn until 0805, then 071°T at 8.5 kn until 0815.

   Give the 0815 DR position as the true bearing FROM Gannet Rock daybeacon to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Gannet Rock daybeacon: ________ °T   Distance: ________ nm  

3. At 0950 you fix your position 051°T, 4.2 nm from Westfield church spire. You steer 097°T at 8.1 kn until 1020, then 330°T at 6.7 kn until 1030.

   Give the 1030 DR position as the true bearing FROM Tern Island tower to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Tern Island tower: ________ °T   Distance: ________ nm  

4. At 1205 you fix your position 063°T, 5.3 nm from Tern Island tower. You steer 262°T at 8.8 kn until 1245, then 188°T at 8.9 kn until 1310.

   Give the 1310 DR position as the true bearing FROM Tern Island tower to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Tern Island tower: ________ °T   Distance: ________ nm  

5. At 0710 you fix your position 144°T, 2.6 nm from Tern Island tower. You steer 075°T at 5.7 kn until 0735, then 174°T at 4.4 kn until 0750.

   Give the 0750 DR position as the true bearing FROM Gannet Rock daybeacon to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Gannet Rock daybeacon: ________ °T   Distance: ________ nm  

6. At 0940 you fix your position 237°T, 2.7 nm from Tern Island tower. You steer 090°T at 4.6 kn until 1025, then 193°T at 8.3 kn until 1045.

   Give the 1045 DR position as the true bearing FROM Gannet Rock daybeacon to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Gannet Rock daybeacon: ________ °T   Distance: ________ nm  

7. At 0945 you fix your position 060°T, 4.9 nm from Tern Island tower. You steer 222°T at 8.9 kn until 1010, then 004°T at 8.4 kn until 1020.

   Give the 1020 DR position as the true bearing FROM Tern Island tower to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Tern Island tower: ________ °T   Distance: ________ nm  

8. At 1405 you fix your position 034°T, 3.5 nm from Westfield church spire. You steer 082°T at 6.3 kn until 1415, then 216°T at 4.0 kn until 1455.

   Give the 1455 DR position as the true bearing FROM Westfield church spire to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Westfield church spire: ________ °T   Distance: ________ nm