Assume that the GHA of the Vernal Equinox at the time of observation is 45Ad. Then the Vernal Equinox can be located on the time diagram as shown in Fig. 157, where the symbol for the Vernal Equinox is located 45Ad W of Greenwich. Next, theanbsp;...
|Title||:||Basic Seamanship and Navigation|
|Author||:||Edmund A. Gibson|