United States Naval Institute Proceedings, 22권,파트 2U.S. Naval Institute, 1896 |
도서 본문에서
9개의 결과 중 1 - 5개
329 페이지
... sight may not seem an important point , but which may readily become so ... telescope , which is almost fatal to fine shooting . Now electrical men show ... telescope until the instant of fire ; and , furthermore , they proceed to point ...
... sight may not seem an important point , but which may readily become so ... telescope , which is almost fatal to fine shooting . Now electrical men show ... telescope until the instant of fire ; and , furthermore , they proceed to point ...
337 페이지
... sight until the gun is actually fired , because , since his fingers alone have to act , his head is not jerked to ... telescope sight , because then the line of sight is so absolutely defined that one knows exactly what he is pointing at ...
... sight until the gun is actually fired , because , since his fingers alone have to act , his head is not jerked to ... telescope sight , because then the line of sight is so absolutely defined that one knows exactly what he is pointing at ...
399 페이지
... TELESCOPE SIGHT . It At 2000 yards , a ship of twenty feet freeboard subtends a vertical angle of less than one - fifth ( ) of a degree . The dis- tance at which a gun captain stands behind his sights may be said to be about 120 inches ...
... TELESCOPE SIGHT . It At 2000 yards , a ship of twenty feet freeboard subtends a vertical angle of less than one - fifth ( ) of a degree . The dis- tance at which a gun captain stands behind his sights may be said to be about 120 inches ...
400 페이지
... sight and the rear sight , of which one is 2000 yards distant , another ... telescope of large field and small magnification has been found to ... sight wrong even if he tries . He cannot take a fine sight , or a coarse sight , or a bad ...
... sight and the rear sight , of which one is 2000 yards distant , another ... telescope of large field and small magnification has been found to ... sight wrong even if he tries . He cannot take a fine sight , or a coarse sight , or a bad ...
401 페이지
... telescope sight has a field of view of 19 ° in each direction , with a magnification of about two ( 2 ) diameters , and is so strong as to be less liable to injury in service than is the ordinary long bar sight ; so it can be kept in ...
... telescope sight has a field of view of 19 ° in each direction , with a magnification of about two ( 2 ) diameters , and is so strong as to be less liable to injury in service than is the ordinary long bar sight ; so it can be kept in ...
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amperes angle apparatus armor armored cruiser barbettes battery battle-ships binding posts boat boilers boys breech circuit coal connected construction cruise cruiser cylinder deck diameter direction distance draught duty dynamo engine-room engines enlisted essayist feet fire force galvanometer graduated gun captain gunnery helm indicator inches index bar instruction instrument knots launched lever line officers magnet marine mechanism ment micrometer modern motor mounted move naval apprentices needle operation orlop deck petty officers pivot placed plate port position finder practice projectile Q. F. guns resistance wire rheostat sailing seamanship seamen shaft shell shore shown in Fig side sight signal speed steam steel steering telegraph target telescope telescope sight tion tons torpedo torpedo-boats training ship training-ship transmitter trial triple-expansion engines tubes turret U. S. Navy United States Navy vertical vessel warrant officer water-tube boilers weight Wheatstone bridge wheel yards
인기 인용구
442 페이지 - ... (c) A sailing vessel under way shall sound, at intervals of not more than one minute, when on the starboard tack one blast, when on the port tack two blasts in succession, and when with the wind abaft the beam three blasts in succession.
442 페이지 - A steam vessel shall be provided with an efficient whistle or siren sounded by steam or by some substitute for steam, so placed that the sound may not be intercepted by any obstruction, and with an efficient foghorn, to be sounded by mechanical means, and also with an efficient bell.
442 페이지 - Sailing vessels and boats of less than 20 tons gross tonnage shall not be obliged to give the above-mentioned signals; but if they do not, they shall make some other efficient sound signal at intervals of not more than one minute.
442 페이지 - The words - prolonged blast,- used in this article, shall mean a blast of from four to six seconds- duration. "A steam vessel shall be provided with an efficient whistle or siren, sounded by steam or by some substitute for steam , so placed that the sound may not be intercepted by any obstruction, and with an efficient fog-horn, to be sounded by mechanical means, and also with an efficient bell. (In all cases where the...
442 페이지 - A vessel, when towing a vessel employed in laying or in picking up a telegraph cable, and a vessel under way, which is unable to get out of the way of an approaching vessel through being not under command, or unable to manoeuvre as required by these Rules shall, instead of the signals prescribed in sub-divisions (a) and (c) of this Article, at intervals of not more than two minutes, sound three blasts in succession, viz.
442 페이지 - ... rules, shall, instead of the signals prescribed in subdivisions (a) and (c) of this article, at intervals of not more than two minutes, sound three blasts in succession, namely: One prolonged blast followed by two short blasts. A vessel towed may give this signal and she shall not give any other.
442 페이지 - Article shall be used as follows, viz. : — (a) A steam vessel having way upon her shall sound, at intervals of not more than two minutes, a prolonged blast. (b~) A steam vessel under way, but stopped and having no way upon her, shall sound, at intervals of not more than two minutes, two prolonged blasts, with an interval of about one second between them.
442 페이지 - ... (In all cases where the rules require a bell to be used a drum may be substituted on board Turkish vessels, or a gong where such articles are used on board small seagoing vessels.) A...
442 페이지 - SEC. 3. That this act shall take effect at a time to be fixed by the President by Proclamation issued for that purpose.
271 페이지 - Boy previous t" being entered must satisfy the Examining Officers — I. That he is of robust frame, intelligent, of perfectly sound and healthy constitution, free from any physical defects or malformation, and not sublect to fits. II. That he is able to read and write.