Mark the Assumed Position (AP) for your Celestial Body (CB) 2. Here are some useful plotting guidelines: 1.
You may wish to use a blank SRF for each of these two new sights. Note that you must calculate the intercept from hc and ho. Use the data in the table below to plot the three sights (all three sights use the same dead reckoning position because the boat is anchored): Celestial Body Remember to correctly scale the longitude lines. This was illustrated for the Sun example during the Plotting a Line of Position video. The first step is to set up the longitude and latitude lines on the plotting paper and marking the dead reckoning position N 30° 12′ and W 60° 10′. The second will be Diphda, the most brilliant star in the constellation Cetus the Whale, and the third will be Capella, the brightest star in the constellation Auriga and third brightest in the northern celestial hemisphere.
This is called a 3-star fix.Īssuming that we have been anchored since we have taken the Sun sight, we wait until twilight to take two more sights. Now that you have completed the AstroNav course, you can practice the fundamentals of plotting using the AstroNav technique with the example of the lower limb of the Sun from the course, along with two additional sights.
0 kommentar(er)
