National Geographic : 1917 Oct
279. Coast Guard cutters patrolling the anchorage grounds of the large harbors of the United States fly at their jackstaff a flag of white upon which is imposed a blue anchor. 280. The service flag of the Coast and Geo detic Survey consists of a blue field' upon which is imposed a disc of white, bearing within its circumference a triangle of red. 281. The Superintendent of the Coast and Geodetic Survey has a flag with a blue field bearing a white triangle on ,the hialfnext to the staff. This triangle, which is equilateral, proclaims the great work of fundamental sur veying in United States waters, which is the chief activity of this bureau. 282. The 30th Congress, August 7, 1848, au thorized "That all such licensed yachts shall use a signal of the form, size, and colors pre scribed by the Secretary of the Navy, and the owners thereof shall at all times permit the naval architects in the employ.- -f the United States to examine and copy the models of said yachts." 283-284. The commission pennants of the Coast and Geodetic Survey are here shown. They are flown at the main mast while the vessels are in commission. 285. The Secretary of Labor has a flag upon which are the four stars that the President and other members of his official family have on their flags, together with the seal of the De partment of Labor. This includes an escutch eon surmounted by a spread eagle, and bearing on its field the plow and other devices which proclaim the dignity of labor. 286. Vessels of the U. S . Immigration Serv ice display a pennant whose field is of white, bordered with blue and lettered with red. It is of a swallow-tailed, triangular design (or burgee) and bears, in addition to the lettering, the seal of the department to which it belongs. 287. Vessels belonging to the U. S. Postal Service fly a red, swallow-tailed, triangular pennant (or burgee), bordered with blue, bear ing the American spread eagle and inscribed with the wolds "United States Mail." 288. The United States power-boat squad rons carry a flag like the yacht ensign, except that it wears perpendicular blue stripes where the'yacht ensign has horizontal red ones, and has a red canton where the yacht ensign has one of blue. 289-300. U. S. WEATHER FORECAST FLAGS AND STORM WARNINGS 289, white flagiindicates clear or fair weather 290, blue flag, indicates rain or snow. 291, white and blue flag (parallel bars of white and blue), indicates that local rains or showers will occur, ard that the rainfall will not be general. 292 always refers to temperature; when placed above (289, 290, 291) it indicates warmer weather; when placed below it indicates colder weather; when not displayed, the indications are that the temperature will remain stationary, or that the change in temperature will not vary more than four degrees from the temperature of the same hour of the preceding day from March to October, inclusive, and not more than six degrees for the remaining months of the year. 293, white flag, with black square in center. indicates the approach of a sudden and decided fall in temperature. When 293 is displayed, 292 is always omitted. When displayed on poles the flags should be arranged to read downward; when displayed from horizontal supports a small streamer should be attached to indicate the point from which the flags are to be read. In the United States the system of weather signals is very complete, information of the approach of. storms being received from vari ous stations in the United States, and even throughout the West Indies. These warnings are published at the various seaports by the display of flags by day and by lanterns at night; also by bulletins and reports furnished to newspapers. Every effort is made by the Weather Bureau of the United States Depart ment of Agriculture to give these warnings as early as possible at all points where they may be of service to mariners and others. Storm warnings are displayed by the United States Weather Bureau at 142 stations on the Atlantic and Gulf coasts and at 46 stations on the Pacific coast. (294) Small-craft warnings.- A red pennant indicates that moderately strong winds are ex pected. (295,'296, 298, 299) Storm warnings.- A red flag, with a black center, indicates that a storm of marked violence is expected. The pennants displayed with the flags indi cate the direction of the wind: Red, easterly; white, westerly. The pennant above the flag indicates that the wind is expected to blow from the northerly quadrants; below, from southerly quadrants. (297) By night a red light indicates easterly winds, and a white light below a red light west erly winds. (300) Hurricane warnings.-Two red flags, with black centers, displayed one above the other, indicate the expected approach of a tropical hurricane, or one of those extremely severe and dangerous storms which occasion ally move across the Lakes and northern At lantic coast. Small-craft and hurricane warnings are not displayed at night.