. Aerographer's Mate 3 & 2. United States. Navy; Meteorology; Oceanography. Chapter 11 —WATCH ROUTINES (CONTINUED) Table 11-1. —Standard precipitation coloring Precipitation areas Coloring Areas of continuous Light green shading, precipitation. Areas of intermittent Light green hatching, precipitation. Areas of showers. Areas of drizzle. Areas of past thunderstorms. Areas of present thunderstorms. Areas of fog. Green shower symbols. Green drizzle symbols Red thunderstorm symbols. Green thunderstorm symbols. Light yellow shading. ®'. »® Figure 11-12.— Forecast movement of fronts and
. Aerographer's Mate 3 & 2. United States. Navy; Meteorology; Oceanography. Chapter 11 —WATCH ROUTINES (CONTINUED) Table 11-1. —Standard precipitation coloring Precipitation areas Coloring Areas of continuous Light green shading, precipitation. Areas of intermittent Light green hatching, precipitation. Areas of showers. Areas of drizzle. Areas of past thunderstorms. Areas of present thunderstorms. Areas of fog. Green shower symbols. Green drizzle symbols Red thunderstorm symbols. Green thunderstorm symbols. Light yellow shading. ®'. »® Figure 11-12.— Forecast movement of fronts and pressure systems. to plot all ship and coast station reports avail- able for drawing a weather map. On such oc- casions, an analyzed weather map and/or prognosis showing the centers of pressure sys- tems, the fronts, and isobars drawn from data given in the coded analysis message may meet the local requirements. Also, in cases of com- munications failure which precludes the receipt of facsimile transmissions, this coded analysis or prognosis may be the only source upon which the weather officer has to base his forecasts. This code reduces to a numerical code form a weather map prepared at forecasting centers of meteorological servicer. Data included in these messages give the types, characteristics, central pressures, locations, and movements of pressure systems and position points for use in drawing the fronts and isobars. Types of fronts (whether warm, cold, occluded, or stationary) and the values for the isobars are also indi- cated in the messages. The message may be either a current map analysis with indications as to movement or development, or a prognostic map analysis. The international code, FM 46( ), was de- signed primarily for marine use. It is an abridged form of FM 45( ), and the symbolic letters and figures h&ve the same meaning in both codes. The symbolic form and an explanation of the letter specifications of these codes, refer to the Internationa
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