Worksheet 197 · 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 1130 you fix your position 069°T, 3.5 nm from Tern Island tower. You steer 202°T at 4.5 kn until 1215, then 106°T at 7.2 kn until 1235.

   Give the 1235 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  

2. At 1030 you fix your position 050°T, 2.6 nm from Tern Island tower. You steer 201°T at 4.6 kn until 1040, then 280°T at 9.5 kn until 1105.

   Give the 1105 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  

3. At 0855 you fix your position 027°T, 3.2 nm from Heron Point Light. You steer 125°T at 4.1 kn until 0935, then 003°T at 6.5 kn until 0955.

   Give the 0955 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 1220 you fix your position 050°T, 2.0 nm from Gannet Rock daybeacon. You steer 265°T at 6.3 kn until 1305, then 084°T at 6.3 kn until 1335.

   Give the 1335 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  

5. At 0750 you fix your position 286°T, 3.7 nm from Tern Island tower. You steer 125°T at 4.3 kn until 0830, then 184°T at 4.6 kn until 0855.

   Give the 0855 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  

6. At 1230 you fix your position 226°T, 1.6 nm from Gannet Rock daybeacon. You steer 015°T at 8.6 kn until 1255, then 154°T at 6.5 kn until 1310.

   Give the 1310 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 1320 you fix your position 229°T, 2.5 nm from Gannet Rock daybeacon. You steer 299°T at 9.1 kn until 1330, then 345°T at 4.7 kn until 1400.

   Give the 1400 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 1550 you fix your position 352°T, 1.6 nm from Mill stack. You steer 270°T at 7.0 kn until 1605, then 303°T at 6.4 kn until 1615.

   Give the 1615 DR position as the true bearing FROM Heron Point Light 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 Heron Point Light: ________ °T   Distance: ________ nm