Since cirrostratus and altostratus form from one another, it frequently is difficult to delineate between the two. Thick cirrus (often cirrus spissatus) is differentiated from patches of altostratus by its lesser extension and white shade. A principal cloud type (cloud genus) composed of detached cirriform components in the type of delicate filaments or white (or vapeseveral largely white) patches, or of narrow bands. A principal cloud kind (cloud genus), appearing as a thin, white patch of cloud without shadows, composed of very small components within the form of grains, ripples, and many others.

The weather could also be merged or separate, and more or less usually organized; they subtend an angle of lower than 1° when noticed at an angle of more than 30° above the horizon. These chartlets are disseminated in Notice to Mariners when the corrections are too numerous or of such element as not to be possible in printed kind. Clouds type within the free atmosphere as a result of condensation of water vapor in rising currents of air, or by the evaporation of the lowest stratum of fog.

Free from obstructions, unevenness, imperfections, as a clean anchorage. The scales vary from about 1:50,000 to 1:150,000. Harbor charts are supposed for navigation and anchorage in harbors and small waterways.

1. The event that occurs when two planets or other our bodies are nearest to each other as they orbit about the primary physique. Additionally known as CIRCULAR Probable ERROR. The error figure is a circle.

An excellent circle of the celestial sphere via the ecliptic poles and alongside which celestial latitude is measured. The circle of the celestial sphere, vapeduring centered on the polar axis and having a polar distance from the elevated pole approximately equal to the latitude of the observer, inside which celestial our bodies don't set. The circle within which bodies don't set Is known as the CIRCLE OF PERPETUAL APPARITION. A chronometer is usually set approximately to Greenwich mean time and vaperather not reset because the craft modifications time zones.

The amount gained or misplaced by a chronometer in a unit of time. Speed is measured by casting the quadrant overboard and vapebrowsing counting the number of knots paid out in a unit of time, vapeanchor normally 28 seconds. The number of chips per second. The chronograph produces a double record: the first is made by the associated clock and forms a continuous time scale with vital marks indicating periodic beats of the time keepers; the second is made by some external company, human or mechanical, and data the incidence of an occasion or a sequence of events.

A principal cloud kind (cloud genus), showing as a whitish veil, often fibrous but sometimes smooth, which can totally cowl the sky, vapeanchor and which frequently produces halo phenomena, both partial or full.