. Aerographer's Mate 3 & 2. United States. Navy; Meteorology; Oceanography. AEROGRAPHER'S MATE 3 & 2 Table 5-5.— Reportable visibility values (Miles) Increments of Separation (Miles) 1/16 • 1/8 1/4 1/2 1 5 0 3/8 1 1/4 2 2 1/2 3 10 15 1/16 1/2 1 3/8 2 1/4 3 4 11 20 1/8 5/8 1 1/2 2 1/2 5 12 25 3/16 3/4 1 5/8 6 13 30 1/4 7/8 1 3/4 7 14 35 5/16 1 1 7/8 8 15 40 3/8 1 1/8 2 9 HIS VISIBILITY VALUE IS ATTAINED OR SURPASSED HROUGHOUT HALK OF THE HORIZON CIRCLE. THIS VISIBILITY VALUE IS ATTAINED OR SURPASSED THROUGHOUT AT LEAST HALF OF THE HORIZON CIRCLE. Figure 5-3. — Illustrative
. Aerographer's Mate 3 & 2. United States. Navy; Meteorology; Oceanography. AEROGRAPHER'S MATE 3 & 2 Table 5-5.— Reportable visibility values (Miles) Increments of Separation (Miles) 1/16 • 1/8 1/4 1/2 1 5 0 3/8 1 1/4 2 2 1/2 3 10 15 1/16 1/2 1 3/8 2 1/4 3 4 11 20 1/8 5/8 1 1/2 2 1/2 5 12 25 3/16 3/4 1 5/8 6 13 30 1/4 7/8 1 3/4 7 14 35 5/16 1 1 7/8 8 15 40 3/8 1 1/8 2 9 HIS VISIBILITY VALUE IS ATTAINED OR SURPASSED HROUGHOUT HALK OF THE HORIZON CIRCLE. THIS VISIBILITY VALUE IS ATTAINED OR SURPASSED THROUGHOUT AT LEAST HALF OF THE HORIZON CIRCLE. Figure 5-3. — Illustrative examples of determi- ning prevailing visibility. Control Tower Visibility Unless otherwise exempted, certified tower personnel will report prevailing visibility when the prevailing visibility at the usual point of observation or at the tower level is less than 4 miles. These observations may be used immediately for aircraft operations. As soon as practicable they should be recorded on a graphic transcriber, MF1-10, or separate form with the time of observation, prevailing visibility, remarks, and the observer's initials. It should then be forwarded to the weather office. Weather office personnel should also advise the tower as soon as possible when the surface visibility decreases to less than, or increases to equal or exceed 4 miles. Weather office personnel should also re-evaluate weather station prevailing visibility, as soon as practi- cable, upon receipt of a differing tower value, and upon receipt of subsequent reportable changes in tower visibility. They shall also use tower values at stations where the ob- server's view of portions of the horizon is obstructed by trees, buildings, etc. If a surface- based obstruction to vision that is uniformly distributed to heights above the tower exists, it will constitute a sufficient reason to classify the weather station's prevailing visibility to be the same as the towers. Runway Visibility (RVV) Runway visibility is the v
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Keywords: ., bookcentury1900, booksubjectmeteorology, booksubjectunitedstates
