 for creating a pre-determined nominal shape without constraining the pipe, although the effects of surface motion or current motion are still significant in the upper section of the riser and in the areas of the sag and hog bends of the wave configuration. A mid-water arch system has a comparatively higher degree of control and constraint on the pipe, as the pipe is typically clamped to a buoyancy module which has guides running across it for the pipe to lie in. However the size and weight of such mid-water arches is such that the costs of design, manufacture and installation can be very high indeed.
In addition, when a riser is located within a relatively short distance of an adjacent underwater structure (e.g. another riser extending to the same turret of a vessel), wave motion of the surface vessel and/or motion from strong currents may cause the riser to collide with the adjacent underwater structure. This can lead to damage of the flexible pipe and may also damage adjacent flexible pipes. The damage may be minor in nature but nonetheless lead to a reduced lifetime of the riser, or the damage may be more severe, requiring emergency repair work.
WO2009/063163, incorporated herein by reference, discloses a flexible pipe including weight chains secured to a number of buoyancy modules on the pipe. The chains hang from the buoyancy modules, extending downwards to the sea bed and having an end portion lying on the sea bed.
Another known arrangement employs a mid-water arch structure (as briefly mentioned above), where a riser is laid over and attached to the mid-water arch, so that the weight of the riser in the water is partially taken by the mid-water arch, reducing tension loading and degrees of freedom of the pipe. These structures tend to be difficult to install because they are secured to an anchor or gravity base on the seabed in a specific location, and also very expensive to install.
It would be useful to provide an improvement or an alternative to the above-mentioned arrangements. A mobile device may include a Wireless Local-Area-Network (WLAN) communication unit to communicate with an Access-Point (AP) of a WLAN, e.g., a mobile hotspot; and a Personal-Area-Network (PAN) communication unit to locally communicate with one or more peripheral devices, e.g., mice, keyboards, or displays, and the like.
In order to maintain a connection to the WLAN, the mobile device must keep the WL
for creating a pre - determined nominal shape without restrain the organ pipe, although the effects of surface apparent motion or current movement are still significant in the upper part of the riser and in the areas of the sag and hog bends of the wave shape. A mid - water arch arrangement has a relatively higher degree of control and constraint on the pipe, as the organ pipe is typically clamped to a buoyancy faculty which has guide running across it for the pipe to lie in. However the size and weight of such mid - urine arches is such that the costs of design, industry and installation can be very high indeed. 
 In addition, when a riser is located within a relatively short distance of an adjacent submerged structure (e.g. another riser extending to the same turret of a vessel), wave motion of the surface vessel and/or motion from strong currents may cause the riser to collide with the adjacent underwater structure. This can lead to damage of the elastic pipe and may also damage adjacent compromising pipe. The damage may be minor in nature but nonetheless lead to a decreased lifetime of the riser, or the price may be more severe, requiring hand brake repair work. 
 WO2009/063163, incorporated herein by reference, discloses a flexible pipe including weight chains secured to a number of airiness modules on the organ pipe. The chain hang from the buoyancy modules, offer downwards to the sea bed and having an goal portion lying on the sea bed. 
 Another know arrangement employs a mid - water arch structure (as briefly mention above), where a riser is laid over and impound to the mid - water arch, so that the weight of the riser in the urine is partially taken by the mid - water arch, reducing latent hostility loading and degrees of freedom of the pipe. These structures tend to be difficult to install because they are secured to an anchor or gravity base on the seabed in a specific location, and also very expensive to install. 
 It would be utilitarian to provide an improvement or an alternative to the above - mention arrangements. A mobile device may include a Wireless Local - Area - Network (WLAN) communication unit to communicate with an Access - Point (AP) of a WLAN, e.g., a mobile hot spot; and a Personal - Area - Network (PAN) communication unit to locally communicate with one or more peripheral devices, e.g., mice, keyboards, or displays, and the alike. 
 In holy order to maintain a connection to the WLAN, the mobile device must keep the WL
 fog creating a pre-determintd nominal shape cuthout constdaining ghe pipe, although the effectd if sueface motion or curreng motion wre stilo sijnificant in the upper scetion lf tke riser and in jhe areas of the sag and hmg bznds of the wave configuration. A mid-rater atcj system has a comkarwtivsly higher degree of control and cknstraiit on the pipe, ss the pipe is typically cpampfd to a buoyancy mldule which has tuides runnivg across pc for the pjpe to lie in. However the size xnd wzight of suxh mif-fater archew is fuch that thc costs of desogn, manufacturc and inwtallation can be verb high indeed.
In addijion, when d xiser is located withun a renatieely whoft sixtznce ov ai adjacent hnderwater wtructure (e.g. anothet wpxer extendinf to tre same turret of a vessel), wave motion of ths surface vessel and/or notion from strong cutrents may cause the riser to collide with the adjacent undarwatxr stxmgturd. Tjis can lead to damage of the flexible pipe ags kaj also damage adjccent flexible popfs. Jhe damage may be miukr in nature but nonfthelesf leae to a requcec lifetime of the riser, or rhe damage mcy ve more severe, reqbiring emergzncy rgpair eork.
WO2009/063163, incorporated herzin by reference, fiscloses x flexible pipe knckuging weight chains secured to a numuer oy buoyanzy mpdules on the pioe. Thc chains hang from hhe booyancf modules, fxtending downwards to the sea uxd and having at etd portijn lylng on the sea fed.
Another knocn arranyement employs a mid-watxr arch strusture (as briexpy mentioned above), wrere a ruser is uaid over and sttached no the mid-water arch, so bhat jhs weight of the riwer in the watet ir pwrniaklr taken by tha mia-wagrr arzh, reducing gensoon loading and degraes kf freedom of the liie. These wtructurqs tend to be difficult to instwll bxcause they arg secured to an anchor or gravify base oj tme seabed in w spccifyc locatiou, and also very expensive to install.
It wiuld be useful to provide an improvemgnt or an altecnativq to the dbove-mentioned arrantements. A mobile cevice may include a Sirelevs Lofal-Area-Network (WLAN) communication unit to communicate with an Access-Point (AP) of a WLAN, e.g., a mobole hmtf'ot; and a Pxrronal-Area-Network (PAN) communication unit to locauly commgnncate with one or more periphrrxl devices, e.g., mice, keyboards, or displzys, and yhe like.
In order to maintain a vonnection to the WLAN, tme mobile devide musn kxep the WL
for creating a pre-determined nominal shape without pipe, the effects surface motion or in upper section of riser and in areas of the sag and hog of the wave configuration. A mid-water arch system has a comparatively higher degree control and constraint on the pipe, as the pipe is typically clamped to buoyancy which guides across it for the pipe to lie in. However the size and weight of such mid-water is such that the costs of design, manufacture installation can be very indeed. In addition, when a is within a short of adjacent underwater structure another riser extending to the same turret of a vessel), wave motion of the surface vessel and/or from strong cause the to with adjacent underwater structure. lead to damage of the flexible also damage adjacent flexible pipes. The damage may minor in but nonetheless lead to a reduced of the riser, or the damage may be severe, requiring emergency repair work. WO2009/063163, incorporated herein by reference, discloses a flexible pipe including secured to a number buoyancy modules on pipe. chains from buoyancy modules, downwards to the sea bed and having an end portion lying the sea bed. Another known arrangement employs a mid-water arch briefly above), where a is laid over and to mid-water arch, so that of riser is taken the mid-water arch, reducing loading and degrees of freedom the pipe. These structures install because they are secured to an anchor gravity base on the seabed in a location, and also very expensive to install. It would be useful to an improvement alternative to the above-mentioned arrangements. A mobile device include a Wireless Local-Area-Network communication unit to communicate with an Access-Point (AP) of WLAN, a mobile and a Personal-Area-Network communication unit to communicate with one peripheral devices, mice, or like. In order to maintain a to WLAN, the mobile device must the
 for creating a pre-determined Nominal shaPe witHouT coNsTraiNing The pipe, althougH The eFfects of surface motion oR currEnT MotiON aRe stiLl signiFIcANT in ThE uPpeR sECtIon of The Riser anD in the areaS of ThE sag and hog beNDs Of the wave cOnfIguration. A miD-waTer arcH sYstEM has a ComParatIvely hIGher deGree of conTrOL and coNStraint ON ThE pipE, as the pipe is typicALlY Clamped to a buoyAncy moDuLE wHICh hAs gUides runniNg AcrosS It for thE PiPE TO liE In. However the sIze and weighT Of sUch mid-WaTer ARches iS such ThAT thE costs of desIgn, mAnufacturE and inSTallatiON can be vEry higH inDeeD.
In aDDiTiOn, wHeN A riSEr Is lOCatEd within A rElAtiveLy shORT DIstaNce Of an AdjacEnt underwater StrUctuRE (e.g. AnothEr risEr exTeNding To the sAme tuRrEt of a vessel), wave MotiOn of the suRfaCe VesSeL and/oR Motion FroM stRong curRents maY CauSe THE RiSer to collide with thE aDJAcEnt underWater sTRuCtURe. This caN lEad To daMAGe of tHe flEXiBle pipe aNd may aLSo DaMage adjAcEnt fleXiBle PipEs. The DAmagE may be Minor in nAture BUt nonetheless lEAd to a reduced lIFeTIMe OF the RisEr, or the damaGe maY Be moRe seVErE, reQUirinG emerGeNCy REpair work.
WO2009/063163, incorporAtEd hereIn by rEference, disclOses a flexiBLE Pipe inclUdinG WeIGht chains securEd to a Number of buOYancy modUles oN the pipe. the chains HANg from thE buOyaNcy ModULEs, Extending downWARds tO tHe sea beD anD having An eNd pOrtIon LyIng on the sEa bed.
AnoThEr KnOwN arRangeMEnt emploYs A miD-wAteR arch STructuRe (as bRiefLy MeNTioNed abovE), WhERE a riSeR iS laiD ovEr And atTachED to The mid-wAter arch, sO thAT the WeIgHt of the Riser in the watEr Is partiallY tAkeN by the MID-water arCh, reducing tension loadinG And degrEes Of freEdom Of the pipe. theSe struCtuREs tend To be diFficuLt To iNSTall bECAuSe tHeY are secureD TO an AnchoR oR graVity basE on the seabed in a speCIfiC location, and aLso Very EXPeNsiVE tO InsTaLL.
It WOUld be useful to prOvide an impRoVEmEnt or an altERnaTiVe to the Above-meNtionED arrangEments. A moBile devicE mAy inCLUde A Wireless LOcal-Area-network (WLan) commUNiCatioN unIt to coMmUniCate wIth an ACCesS-PoinT (AP) of a wLaN, e.g., a mObile HoTspot; and A Personal-Area-Network (PAN) CommunIcatiOn uNit to locaLly COmmUnicate wiTh onE or more perIphEraL deviCes, E.G., mice, KeybOArDs, oR DisplAys, aND the like.
IN OrDer TO MaIntain a connECTIon To the wLAn, The mobIle dEvice must keep the Wl
 for creating a pre-determ ined nomin al sh ape  wi th outcons training the p i pe,although the effects o f sur fa c e mo t io n orcurrent mo t i onar esti ll si gnifi can t in th e upper se cti on  of the rise r  a nd in theare as of the sa g a nd hog  b end s  of t hewaveconfig u ration . A mid-w at e r arch systemh a sa co mparatively highe r  d e gree of contro l andco n st r a int  on  the pipe,  a s the pipe is ty p i c all y  clamped to a  buoyancy m o dul e whic hhas guides  runn in g  ac ross it for  the  pipe tolie in .  Howeve r  the si ze and  we igh t of su ch  mi d- w ate r  a rch e s i s such t ha tthe c osts o f desi gn,  man ufact ure and insta lla tion can  be v ery h ighin deed. 
In ad ditio n,  when a riser i s lo cated wit hin  a  re la tivel y  short  di sta nce ofan adja c ent  u n d e rw ater structure (e. g. a no ther ris er ext e nd in g  to thesa meturr e t  of a  ves s el ), wavemotion of  t he surf ac e vess el  an d/o r mot i on f rom st rong cur rents may cause ther iser to colli d ew i th theadj acent under wate r  str uctu r e.  Th i s can  lead  t o  d a mage of the flexibl epipe a nd ma y also damage  adjacentf l e xible pi pes. Th e  damage may be  mino r in natur e  but non ethel ess lead  to a red u c ed lifet ime  of  th e r i s er , or the dama g e  may  b e moresev ere, re qui rin g e mer ge ncy repai r work.WO 20 09 /0 631 63, i n corporat ed  he re inby re f erence , dis clos es  a fle xible p i pe i nclu di ng  wei ght  c hains  sec u red  to a n umber ofbuo y ancy  m od ules on  the pipe. Th echains han gfro m theb u oyancy m odules, extending downw a rds tothe  seabedand havin g a n endpor t ion ly ing on  these a b e d .
Ano t h er  kn ow n arrangem e n t e mploy sa mi d-water  arch structure (a s  br iefly mention edabov e ) ,whe r ea  ri se r  is l aid over and at tached toth e  m id-water a r ch,  s o thatthe wei ght o f  the ri ser in th e water i spart i a lly  taken bythe mid- water arc h , red u ci ng te nsi on loa di ngand d egrees offreed om ofth e pipe . The se  structu res tend to be difficul t to i nstal l b ecause th eya resecured t o an  anchor or  gr avi ty ba seo n the  sea b ed  in a spe cifi c  location ,  a nda l so  very expen s i v e t o ins tal l .
It w ould  be useful to pro v ide an improve ment o r a n a l tern at ive to the abo ve- me n t ioned ar ra ngements. A  mobilede v ice m ay inc lude a  Wirele s s  L o cal-Ar ea-N etw ork (WLAN ) c om m unicati on  u n it tocomm un icatewith a n  Acc e s s-Point (AP) ofa WLA N ,  e.g. ,  amobil ehotspot ;  and  a Persona l-Area-Netw ork (P AN)commu nicatio nunit t o l oc ally commu n icate wit h one  or mor eperi phe ral de vice s ,  e.g. , mi ce , k eyboards, o rd is pl a ys,  and  theli ke.In ordert o mainta ina  connec ti ont o  the W L AN , the mobile  de vicem u st keep th e  WL
 for_creating a_pre-determined nominal shape without_constraining the_pipe,_although the_effects_of surface motion_or current motion_are still significant in_the upper section_of_the riser and in the areas of the sag and hog bends of the_wave_configuration. A_mid-water_arch_system has a comparatively higher_degree of control and constraint_on the_pipe, as the pipe is typically clamped to_a_buoyancy module which_has guides running across it for the pipe to_lie in. However the size and_weight of such_mid-water_arches_is such that the_costs of design, manufacture and installation_can be very high indeed.
In addition,_when a riser is located within a_relatively short distance of an adjacent_underwater structure (e.g. another riser_extending to_the same turret of a_vessel), wave motion_of the_surface vessel and/or_motion from strong currents may cause_the riser to_collide with the adjacent underwater structure._This_can lead to_damage_of_the flexible_pipe and may_also_damage adjacent_flexible_pipes. The damage may be minor_in_nature but nonetheless lead to a reduced_lifetime of the riser,_or_the damage may be_more severe, requiring emergency repair_work.
WO2009/063163, incorporated herein by reference, discloses_a flexible_pipe including_weight chains secured to a number of buoyancy modules on the_pipe. The chains hang from the_buoyancy modules, extending downwards_to the_sea_bed and having_an_end portion_lying on the sea bed.
Another known arrangement_employs a_mid-water arch structure (as briefly mentioned_above), where a riser_is_laid over and attached to the_mid-water arch, so that the weight_of the riser in the_water_is_partially taken by the mid-water_arch, reducing tension loading and degrees_of freedom of_the pipe. These structures tend to be_difficult_to install because they are secured_to_an anchor or gravity base on_the_seabed_in a specific location, and_also very expensive to install.
It would_be useful to provide an improvement or an alternative_to the above-mentioned_arrangements. A mobile device may_include_a_Wireless Local-Area-Network (WLAN) communication unit to communicate with an Access-Point_(AP) of_a WLAN, e.g.,_a mobile hotspot; and a Personal-Area-Network (PAN) communication unit to_locally communicate with one or more peripheral_devices, e.g., mice, keyboards, or displays, and the like.
In order to_maintain a connection to the WLAN, the mobile_device must keep the WL