Navigation of the Atlantic ocean

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J.D. Potter, 1883 - 192 sivua
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Sivu 37 - WIND 0 Calm. 1 Light Air 2 Light Breeze 3 Gentle Breeze 4 Moderate Breeze 5 Fresh Breeze 6 Strong Breeze — 7 Moderate Gale 8 Fresh Gale 9 Strong Gale 10 Whole Gale...
Sivu 120 - Guinea currents. — These exhibit the remarkable phenomenon of parallel streams, in contact with each other, flowing with great velocity in opposite directions, and having a difference of temperature amounting to ten or twelve degrees.
Sivu 38 - Passing temporary showers. q — Squally. r — Rain ; continued rain. s — Snow. t— Thunder. u — Ugly threatening appearance of the weather. v— Visibility of distant objects, whether the sky be cloudy or not. w — Wet dew. . — Under any letter, indicates an extraordinary degree. By the combination of these letters, all the ordinary phenomena of the weather may be recorded with facility and brevity. Examples : — bcm, Blue sky, with detached opening clouds, and a hazy atmosphere, gv, Gloomy...
Sivu 75 - But all danger from ice is far less than that which arises from the prevalence of fogs : they may occur at any time during the open or navigable season, but are most frequent in the early part of summer ; they are rare, and never of long continuance, during westerly winds, but seldom fail to accompany an easterly wind of any strength or duration.
Sivu 84 - St. Lawrence, and that by attending constantly to its state and changes, with reference to the winds and weather which preceded them, combined with the indications afforded by the appearance of the sky, &c., those changes of the wind and weather, which are about to take place, may be anticipated with a degree of certainty sufficient, in most cases, to enable us to...
Sivu 75 - ... are most frequent in the early part of summer ; they are rare, and never of long continuance during westerly winds, but seldom fail to accompany an easterly wind of any strength or duration. The above general observation is subject, however, to restriction, according to locality, or season. Thus winds between the south and west, which are usually clear weather winds above Anticosti, are frequently accompanied with fog in the eastern parts of the Gulf. Winds between the south and east are almost...
Sivu 38 - Blue sky. — Whether with clear or hazy atmosphere. C „ Cloudy. — ie Detached opening clouds. d „ Drizzling rain, f
Sivu 82 - I have endeavoured to describe, of an easterly gale, with a falling barometer, being always wet and foggy, and succeeded by a strong wind from the opposite quarter with a rising barometer. A second case, not of so frequent occurrence in common seasons, excepting in spring or early in summer, is the easterly wind with a rising barometer; which, although it may not be at first for a few hours, will almost always become fine and clear, and end in fine weather. A third case may be considered...
Sivu 82 - Easterly gale will not be improbable. We have experienced seasons in which the barometer may be said to have been no sooner blown up by one wind, than it has been blown down by another, and this stormy alternation to have continued for several months ; whilst in others we have scarcely had a double-reefed topsail breeze during the whole summer. There is, in fact, so great a difference in the phenomena of the weather in different seasons, that it becomes very difficult to write anything respecting...
Sivu 76 - ... of the deep-sea lead, with a chart containing correct soundings. The fogs, which accompany easterly gales, extend high up into the atmosphere, and cannot be looked over from any part of the rigging of a ship. They, however, are not so thick as those which occur in calms after a strong wind, and which are frequently so dense as to conceal a vessel within hail ; whilst the former often, but not always, admit the land, or other objects, to be distinguished at the distance of half a mile, or more,...

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