. Notes on torpedoes, offensive and defensive. c % so far. as that line was concerned. This latter systemrequires great coolness and nerve on the part of the obser-ver at (&,) as he has two things to do, viz, to watch the ves-sel passing across his intersections, and to be on the alertto receive the signal from (a.) In such a case it has been 189 found best to employ two men at station (/;,) one exclusivelyto watch the station (a,) and on the flag being- raised togive the word fire,7 and on the flag being dropped to givethe word u stop, the second man would keep his eye on thevessel, and be re
. Notes on torpedoes, offensive and defensive. c % so far. as that line was concerned. This latter systemrequires great coolness and nerve on the part of the obser-ver at (&,) as he has two things to do, viz, to watch the ves-sel passing across his intersections, and to be on the alertto receive the signal from (a.) In such a case it has been 189 found best to employ two men at station (/;,) one exclusivelyto watch the station (a,) and on the flag being- raised togive the word fire,7 and on the flag being dropped to givethe word u stop, the second man would keep his eye on thevessel, and be ready to fire the right mine at the rightmoment. A separate signal-flag and firing arrangementwould, as before, be required for the next line (^ n& &c.)of mines. /j\ % 80. / i \. #!#No separate intersec- so far advanced toward the tions for each As in many cases it would not be practicable to have astation in such a position as (a point of attack, with the corresponding danger of being cutoff by an enemy, another combination becomes necessary;this is shown in Fig. 80. Two stations (a) and (&,) well withinthe defensive works, are selected in such a position that the 190 lines, passing from them over each charge, shall intersect insuch a manner as to give what is termed a well-conditionedtriangle, or, in other words, that they shall not intersect eachother at too oblique an angle. The battery is placed atthe point («,) one pole being attached to earth, while tileother is connected with a center from which radiate a seriesof contact-keys. From the studs or contact-points of thesekeys a series of cables, corresponding in number to thecharges in i>osition, pass to the similar contact-points of asimilar set of keys at the station (&,) and from the pivots
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherwashi, bookyear1872
