SUGGESTIONS FOR IMPROVING FISHING VESSELS. 
187 
will often make 11 to 13 knots under sail and steam. Often, when vessels of this class 
have a favorable wind, they disconnect the screw and rnu under sail alone. 
Cost and expense of running a steam-trawler . — A steam trawler, such as has been 
described, would cost trom £4,000 to £4,500 (120,000 to $22,500), which is about three 
times as much as a first-class sailing trawler would cost. Then a steamer is more 
expensive to run. In the first place, she must have three more men, of the class, too, 
that receive high pay ; then there are the repairs to machinery, coal, oil, etc., which 
together amount to quite a sum. As an offset to this, a steamer will stock from twice 
to three times as much as a sailing trawler. 
Redwayh steamer . — The smaller class ot steamers designed alone for fishing are 
sometimes considerably sharper than those from Grimsby, not requiring so much carry- 
ing capacity The following details of dimensions, etc., are those of a design by W. 
E. Eedway, of Milford Haven (Plates 23, 24, and 25), from which several steam-trawl- 
ers were built in 1883. This type of vessel is now in high favor, it is said, and it is 
claimed that they are very serviceable, swift, and sea- worthy. 
The following are the principal details of a vessel of this type : 
Feet. Inches. 
Length by Lloyd’s measureuieut 
Breadth hy Lloyd’s measurement 
Depth hy Lloyd’s measurement 
Depth of hold 
Load draught 
Least height of freeboard 
Tonnage gross register (approximately) 
Tonnage net register (approximately) .. 
Builder’s measurement 
87 6 
20 0 
12 4 
10 8 
10 6 
2 9 
Tons. 
96 
50 
155 
Weight of hull 
Weight of machinery 
Weight of outfit 
Weight of coal 
Weight of water 
Total dead weight capacity 
Total displacement 
Elements of design of hull; 
Length of fore body feet.. 
Length of afterbody do... 
Area of immersed midship section square feet.. 
Ratio that area of immersed midshij) section bears to its circumscribing rectangle 
Area of load water plane square feet.. 
Ratio that load water plane hears to its circumscribing rectangle 
Displacement per inch of immersion at load waterline tons.. 
S(iuare feet of immersed strrface 
Square feet of augmented surface 
Coefficient of fineness = *^^isp^^cement _ 
LXBXD 
Area immersed vertical longitudinal section square feet.. 
Center of lateral resistance from fore end of load water line feet.. 
Center of buoyancy below load water line do... 
Metacenter of buoyancy do... 
Area of lower sails square feet.. 
Center of effort above load water line feet.. 
Center of effort abaft fore end of load water line do 
62 
20 
15 
20 
10 
48 
175 
48 
40.5 
118 
.65 
1,218 
.688 
2.9 
2, 082 
3, 836 
770 
47.4 
2. 99 
4. 68 
2,238 
29. 25 
46.25 
