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DEEP CONDITION SHEWN

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Originally appearing in Volume V24, Page 927 of the 1911 Encyclopedia Britannica.
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DEEP See also:

CONDITION SHEWN NORMAl. •• See also:LIGHT _...--- See also:form. The additional weights that constitute the difference between light and deep load (i.e. See also:cargo, See also:coal, stores and See also:water) are generally placed See also:low down, and thus the position of the centre of gravity is usually See also:lower when loaded than when light, causing an increase of stability which frequently more than compensates for the loss of stability indicated by the See also:cross curves. The stability curves for the same See also:vessel are reproduced in fig. 10. It is customary in warships to draw See also:separate curves for three conditions: (a) normal load, i.e. fully equipped with bunkers about See also:half full, and reserve feed tanks empty; (b) deep load with all bunkers and tanks full; (c) light with all coal, water (except in boilers), See also:ammunition, provisions and consumable stores removed. The curves for a cargo or passenger See also:ship are generally See also:drawn for the condition when light, when fully,laden with passengers or with a -25 the See also:influence of See also:beam and See also:freeboard. homogeneous cargo, and sometimes for an intermediate condition; typical curves are given in fig. It. Stability curves are obtained on the assumptions '. That all openings in the upper See also:deck, forecastle and See also:poop (if any) are covered in and made watertight; and the buoyancy of any erections above these decks is generally neglected. 2.

That the See also:

side of the ship is intact up to the upper deck, all side scuttles, ports or other openings being closed. 3. That all weights in the ship are absolutely fixed. 4. That no changes of See also:trim occur during the inclination. In some cases curves are drawn (a) with forecastle and poop intact, (b) with these thrown open to the See also:sea, the latter condition being more commonly considered. The slope of the stability See also:curve for small angles, the maximum righting See also:lever with the See also:angle at which it occurs, and the range or the inclination at which the stability vanishes are of particular See also:interest, inasmuch as the curve depends principally on these features; and the effect on them, particulars of variation of freeboard; breadth and position of centre of gravity, is considered below. The stability curve AA (fig. 12) is drawn for a See also:box-shaped vessel of See also:draught to ft., freeboard to ft. and beam 30 ft.; with C.G. in the water-See also:plane. The curves EE, FF, GG are drawn for the same vessel, but with freeboard altered to 121, 72 and 5 ft. Effect of respectively; it will be observed that freeboard has no freeboard. influence on the stability at small angles, but has a marked effect on the range and maximum righting lever.

End of Article: DEEP CONDITION SHEWN

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