'J'ii.» r..u.!iiL-ipe of inci'eaiied hoy';-a ijouor, in tliirj inntabco, ijac; ic.o,re tl)o.n 

 ciTuLiO by Lliu cuiiilxa'LJOincuofltJ ol Uxo •L;;iii--;cro\j JiLAiilalviion. 



Thin cnjilno in;3tallation in xaost ui." tna vost;ai.T iiar; pood and 

 tharu • Tiero coniparativoiy fe\j brcal:do;,'na. Maintcnanoo van kapfc as aijiipla 

 i\'j poiioible. Ihny of the luoi'-e expei-'ionced cru;/ mc.iibors aro c::pabie of 

 i.;alsinj niinor rcprirs at cea. If a breakdo;m cannot be i'cpair--'d, otlicr 

 voj,-j.i.L:j fiGhing in the vicinity cooperatG either by supplyinr; j'^par^s 

 part;; and tochnical knoijledgo or by touing the dicablcd vessel into 

 port. Aj thoce vessels usually fish in groups of 10 to 100 boats, aa- 

 sist.iiico its noarly always at hand. 



According to a recent article by Mr. Jan-Olof Traun^^ in Fi:;h- 

 ! i . ; Piiii.tr-I Ml, cngino efficiency is dii'ectly rolatod to the Icn^ibh of 

 thi; IlULI. i:iy Mr. Traung cites several examples in support of his find- 

 ing;.; that additional hull len^^bh decreases the required horae pov.'or per 

 ton of hull xjolglit. It is claijtied that tank toota iiavj pro>r^d that a 

 65.1!>-'foot and a 105-foot boat can both be driven at 9 knota by a 200 

 h.p. main cniino, altnou^h tho bigner boat has a beam of 2li fc.-'t 2 inches 

 oof,ip:irod uitn 19 feet 7 inchoG of tno smaller boat and a dicplaceracnt of 

 320 tons coiiipared tiith 110 tons, 



Mr. Traung is of the opinion that there is a tendency to ovji-- 

 pow'ur fi.'Jhiiig craft. The tiastefulnoss of this practice is demonatratcd 

 ]>/ t;;.:pci-i(uoat;j uhlch Ivavo shown tlmt a 69-foot boat can bo di-ivon at 10 

 laicjtj t>y a 200 h.p, engine, and that doubling the engine horso power to 

 I4OO \iLLl only add 1 knot to the speed. 



Engine costs vary %jlth make and poxjor. Tj-pical cnidnes of 

 veaseia in the 60- to 65-foot class (25-30 net tons) acquired in the 

 yv.aj,'a 1953-511 More carried on the books at l!l'.y,000 to si'J-OjUOO, accord.lai;'; 

 to atatistics on vessel costs colloctod by the Federal Trade Co/m:iissiuii. 

 Tliia amount, in many instances, represented a substantial part of total 

 fiiLud investiuont of the boat ovnier. 



FrC; ^'-:ing Enuip ment 



The practice of froeaing shrimp at sea is expanding. TIa-ee 

 frecaing methods are used in the slu-inp fleet; (l) alielf or plate 

 freeain^', (2) blast fx-jioslng, and (3) iraiaersion freezing. 



Shelf or plate freezers require substantial aiiiomits of space 

 aud involve considerable invontnient in equipiuent. In this process tno 

 ^juriuip are pi\jpackod in ^-pound cartons and placed on refrif/o rated, 

 tiiiiij coi'rosion-resistant luetal plates. The chilling is effected maiLniy 

 tui'ouih the bottom of the cnrtoii, and since paper cartons are poor con- 

 du.itors of heat, freoiiing is relatively slov). Because of their thickness, 



ToT Ai- tide by Jan-Olof Ti'aung, Chief of tV:e Fishing Boat Sectioii of 

 tiie Fisheries Division, Food and Agriculture OrganiEabion, in F.A .0 .. 

 FiL'i3rios_Bulletln, Cat. -Dec. 1955, as conden-ed in the L-irch 195^ 

 is.jue of Fisi^erio3._N£LTsletter, publii.hed by the Coniiiionucalth Director 

 of Fislierles, Dspartiucnt of Priiiiary Industiy, Sydney, Australia. 



95 



