'y 



th* Bcssea^er line aust b« drawn caur and stopj»ed ot'f. The ,wo ssiall 

 scoHp«r lines can be severed by the d;ver vhcn th« device Is ri:'.>!.>d 

 for release. 



Devices of chis t>*?e can be easily aodlfled to include 9t least 

 three additional scuba bottles. This would inci^^se the dry weight 

 but v»ould not affect the in-vater (-■eight of the device and woul.^ not 

 increase Its sise. The added gas capacltv could he i*sed to increase 

 the number of buoyancy ad justner.t.-» possible or to enhance lift capahiiity 

 at deeper depths. The added bottles could also be provided a separate 

 runifold ami be used au an auxiliary or e=ert;ency breathinij Ras supply. 



All of the reconrjendations rude Vv th^ divers were coo"4ldered 

 appropriate. The changes suggested by th<- divers after the tank te?.ts 

 were incorporated in th;* prototype design tor tiie sea tests. In addition, 

 to assist the diver in repacking the collapsed Inflation sag, a vent 

 valve was added at the top of the bag to pernit bleeding off any pocket 

 of gas reiiaining after the ilpper slide has been fully raised. 



CONCLL'Sias'S 



The device satisfactorily aet the planned test objectives and 

 was forvarded to the Harbor Clearance L'nit stationed in liawaii for 

 In-service evaluation. 



KECOMME.'OATIONS 



It is rccorvnt-nded tiiat fufjre f a'.ricat ion of sucj devices utilize 

 conventional methods of lanlnatin.i; joints with -^lass fabric and resin. 

 The prototyixr fiber glass structure vj> assembled bv :=akins epoxy 

 fillets instead of reinf orcini; the junctures with 1 ib-er glass raat 

 and resin. During tests the joints proved too brittle to take <hoclt 

 loading when the device was dropped into t^e "Jater. 



It is recotrmcndtd th.it the buoyancy bag be inilated only for 

 assistini with load handlini; and stf-jnln-; r.ies-.enger lines and not 

 be enploved Co send t'le device to the surface free of a tether unless 

 for soffje sp-cial purpose partial inflation is requlrt'-i. in such instir.c 

 Inflation should be li=ited to the -^iiis'-a required, by setting t' -• 

 zipper slide at a proper location. 



A(:i:>;OUTEDOME.ST 



Tti.- author wishes to acknowledsi- t'u: assistance of the CEL 



divinK division personnel and Mr. Jc'.n Mucli-r.m di:ri.r..', ::,«• dlvln*- 



ph.-iscs of tiu- developnent and testing. 



