referring to the drawings wherein like reference numerals designate corresponding parts throughout the several figures , reference is made first to fig1 . a cover for a boat and trailer is identified by numeral 11 and is so configured that it is mounted to trailer 12 , and is capable of vertical movement by an operator turning winch handle 13 which engages winch system 14 to operate the cable system 15 which effects the raising and lowering of cover 11 . it should be noted that this invention contemplates substituting for the winch 14 , any of several types of activating systems such as an electrical winch or one which is operated by a hydraulic system . the trailer 12 is essentially a conventional boat trailer having a hitch coupling 16 connected to the trailer tongue 17 , which connects generally to the trailer frame 18 . the trailer frame 18 has a wheel assembly comprising an axle 19 attached to the frame 18 , and the axle 19 has a pair of wheels 21 attached to the outer ends of the axle . associated with the frame 18 are several boat hull cradle members 22 which support a boat placed thereupon in a conventional manner . it should be noted that various types of trailer designs may be utilized with the present invention and the trailer design will typically be dictated by the type , size and weight of the boat to be placed on the trailer . the cover 11 is sized and generally shaped to fit a boat which would be carried upon the trailer 12 and may take various forms in order to fit both the trailer and the desired boat . the cover , as shown in fig1 is of a boxy appearance . however , it is contemplated that the cover could be of a streamlined nature as the situation may dictate . the shape and size of the cover 11 is relatively immaterial as long as it fits the boat and the trailer and is capable of being raised and lowered in the intended manner . as seen in fig1 the cover 11 generally comprises a top 23 , a pair of side panels 24 ( only one is shown ), a pair of forward quarter side panels 25 ( only one is shown ), a front 26 and a back ( not shown ). it is anticipated that the cover may be manufactured of any suitable material such as wood , metal , fiberglass and the like . in order to support the cover l , the entire cover support frame 27 is placed upon and fixed to the trailer frame 18 . the cover support frame 27 generally comprises the forward transverse cover support frame 28 and the aft transverse cover support frame 29 . each of the frames 28 and 29 have respective transverse connecting members 28 a and 29 a , which interconnect the respective forward port cover stanchion 31 and forward starboard cover support stanchion 32 . on the aft portion of the trailer , the transverse cover support frame 29 a connects to and supports the aft port cover support stanchion 33 and the aft starboard cover support stanchion 34 . each of the support stanchions 31 - 34 include telescoping members comprising an inner stanchion and an outer stanchion which telescope together , and are further identified respectively as 31 a and 31 b for the forward port cover support stanchion , 32 a and 32 b for the forward starboard cover support stanchion , 33 a and 33 b for the aft port cover support stanchion , and 34 a and 34 b for the aft starboard cover support stanchion . as is noted in fig4 a and 4 b , the inner support stanchions are a somewhat smaller in cross - sectional area than the outer support stanchions in order to accommodate the cable system which raises and lowers the cover 11 . referring now to the cable system 15 as more particularly shown in fig2 , 4 a and 4 b , it can be seen that the common cable 35 is wound around the winch 14 and then extends rearwardly to forward pulley array 36 at which point it is coupled with the forward port lifting cable 37 and the forward starboard lifting cable 38 by means of a suitable cable clamp 39 . the forward pulley array 36 will typically be mounted to the transverse connecting member 28 a and the forward port lifting cable 37 will be positioned operatively around pulley 36 a and then will extend to pulley 37 a , which is suitably connected to the forward port cover support frame 28 , and is then directed to the forward port upper lifting pulley 37 b connected to the uppermost portion ( as seen in fig4 a ) of forward port cover support inner stanchion 31 a . thence , the lifting cable 37 is positioned around pulley 37 b and depends down slot 41 between inner stanchion 31 a and outer stanchion 31 b where it then terminates at a fixed point 42 in the lower portion of outer stanchion 31 b . it should be noted that the various support stanchions , namely , 31 , 32 , 33 and 34 , are of equivalent construction and , as such , only the forward port cover support stanchion is shown in detail in fig4 a and 4b . obviously , the outer cover of each stanchion is affixed to the inside of the cover 11 so that the cover is fully supported at four places to effect the lifting procedure as needed . consequently , the details of support stanchions 32 , 33 and 34 are not fully shown as they will be structurally equivalent to support stanchion 31 . therefore , it can be seen that forward starboard lifting cable 38 , being connected to common cable 35 , is positioned around pulley 36 b , pulley 38 a and pulley 38 b , and then terminates to its respective outer stanchion in the manner shown in fig4 a and 4b . common cable 35 continues aft towards aft pulley array 40 and connects to aft port lifting cable 43 and aft starboard lifting cable 44 by means of a suitable clamp 39 . in the manner described with respect to the forward lifting cables , the aft port lifting cable 43 is positioned around pulley 40 a and thence around the aft port lower lifting pulley 43 a and the aft port upper lifting pulley 43 b , which then terminates in its respective outer stanchion in the manner shown in fig4 a and 4b . similarly , the aft starboard lifting cable 44 is positioned around pulley 40 b and thence around the aft pulley array 40 and thence engages aft starboard lower lifting pulley 44 a and aft starboard upper lifting pulley 44 b , and subsequently terminates in its respective outer stanchion in the manner shown in fig4 a and 4b . in operation , if an operator desires to load a boat upon trailer 12 , and assuming that the boat is in the water , the operator would typically operate the winch handle 13 to wind the winch cable 35 upon the winch 14 which would pull the common cable 35 forwardly thereby acting upon lifting cables 37 , 38 , 43 and 44 and , because these cables are attached to the their respective outer stanchions , the cover 11 would be lifted vertically above the trailer to give access to the cradle members 22 for the purpose of loading a boat thereupon . at this point , typically the operator would then back the trailer into the water , float the boat into position upon the cradle members , and then remove the trailer from the water , and then firmly secure the boat to the trailer . at this point , the operator would then lower the cover 11 by reversing the winching procedure and since the cover 11 has some inherent weight it will lower itself to enclose the boat and secure all boat equipment within the cover . therefore , the foregoing is considered as illustrative only of the principles of the invention . further , various modifications may be made of the invention without departing from the scope thereof and it is desired , therefore , that only such limitations shall be placed thereon as are imposed by the prior art and which are set forth in the appended claims .