while this invention may be embodied in many different forms , there are described in detail herein a specific preferred embodiment of the invention . this description is an exemplification of the principles of the invention and is not intended to limit the invention to the particular embodiment illustrated throughout this description , it should be considered that the term ‘ boat ’ refers to all types of marine vessels where utilization of fender is possible or would be possible . concealable fender assembly according to the present invention is arranged so as to function on the lateral surfaces ( 2 ) of the boat hull ( 1 ). the concealable fender assembly of the invention comprises an openable and closeable cover ( 4 ) provided on the lateral surface or surfaces ( 2 ) of the boat hull . the cover ( 4 ) is associated with the fender ( 6 ), and when the cover is opened , the fender ( 6 ) opens outward from the hull lateral surface ( 2 ), and when said cover is closed , said fender is concealed to the eye looking at the boat from outside . the cover outer surface ( 5 ) has a form compatible with the boat &# 39 ; s lateral surface ( 2 ). thus , when the cover ( 4 ) is closed , perfect ( continuous and flush with ) lateral surface form of the boat is maintained . the fender ( 6 ), when assembled , faces the inner surface ( 5 ′) of the cover ( 4 ). however , when the cover ( 4 ) is closed , a housing ( 3 ) is arranged in the inner part of the hull for concealing the fender ( 6 ). the housing ( 3 ) is preferably in the form of a cylindrical case and is arranged on the boat hull ( 1 ) in a water - tight manner . the cover ( 4 ), as described below , is connected rotatably inside the cylindrical case formed as housing ( 3 ). the fenders ( 6 ) are semi - cylindrical in form and conventionally are suspended downward from the side of the boat such that cylinder axis is provided in the vertical direction . considering this point , the cover ( 4 ) of the assembly according to the present invention is preferred to be rotated around an axis in the vertical direction for facilitating the execution of the present invention . however , said cover ( 4 ), if required , can also be rotated around a horizontal axis with respect to the fender ( 6 ) connection configuration . a mechanism for actuating the cover is connected to a motor shaft ( 15 ) rigidly connected to the inner or top edge of the cover ( 4 ) ( e . g . through welding etc .) and extending in the vertical direction such that the motor can rotate 180 ° about the shaft ( 15 ). this mechanism for actuating is preferably a motor ( 14 ) which can be selected as a stepper motor , as well as a conventional motor where 180 ° rotation of the cover can be controlled through switches arranged on the opposite sides of the cover and boat hull . the cover ( 4 ) may be mounted on the boat hull through the lower edge thereof by a conventional rotary bearing ( not shown in figures ). certainly , it will be appreciated that the positions of the motor and said rotary bearing can be changed ( i . e . such that the motor is provided in the lower part , while bearing is provided in the upper part ). in order to connect the fender ( 6 ) with the cover ( 4 ), a cord connecting arm ( 8 ) extending horizontally from the cover inner surface ( 5 ′) towards the inner part of the boat hull is provided . the cord connecting arm ( 8 ), in terms of the height thereof , is provided above the fender ( 6 ). preferably , a cord ( 7 ) made of an elastic material is connected to said connecting arm ( 8 ) at one end , and to the fender ( 6 ) at the other end . thus , the fender ( 6 ) is connected with the cover ( 4 ) through upper part thereof by said cord ( 7 ). another cord ( 7 ) is connected thereto through the lower part of the fender ( 6 ); the connection of the other elastic cord ( 7 ′) on the cover ( 4 ) side will be described below . a plurality of rollers ( 9 ) extending vertically between the fender ( 6 ) and the cover ( 4 ) is provided . the fender ( 6 ) rests against said rollers ( 9 ) when it comes into contact with an external object ( boat , dock , etc .). the rollers ( 9 ) are mounted by means of the roller bearing shafts ( 11 ) along the axes thereof in such a way that said rollers can rotate on the outer surfaces of said shafts . thus , the fender ( 6 ) can easily rotate around its axis by means of the rotating rollers ( 9 ) and therefore wearing of the fender during contact with an external object is avoided . the rollers ( 9 ) surround the fender ( 6 ) during contact through rear side thereof and preferably up to 120 °. according to an embodiment of the present invention , the rollers ( 9 ) are three in number and the said rollers are arranged in the vertical direction so as to be provided with a certain distance in between them and to define an arcuate array form when they are arranged so as to suit external cylindrical form of the fender ( 6 ). roller bearing shafts ( 11 ) bearing the rollers ( 9 ) are connected to a roller shaft support ( 10 ) through the lower and upper parts thereof . optionally , a spring ( 13 ) can be placed between each roller ( 9 ) end part and the roller shaft support ( 10 ). prevention of the lateral swings of the rollers ( 9 ) during contact of the fender ( 6 ) with an external object becomes possible thanks to said springs ( 13 ). according to the preferred embodiment of the present invention , springs ( 13 ) are preferably placed in the lower part of the rollers ( 9 ). however , optionally , springs ( 13 ) can also be placed between each roller ( 9 ) end part and the roller shaft support ( 10 ), between both end parts . one of the roller bearing shafts ( preferably the one in the middle ) extends upward from the roller shaft support ( 10 ) provided in the upper part , and thus said extension assumes the function of motor shaft ( 15 ). the roller bearing shaft provided in the middle extends downward from the roller shaft support ( 10 ) provided in the lower part . the cord ( 7 ′) connected at one end thereof to the lower part of the fender ( 6 ) is inserted into a cord channel ( 12 ) coaxially formed inside / along the roller bearing shaft ( 11 ) and conveying of said cord upward through said channel ( 12 ) is provided , then , said cord ( 7 ′) exits the roller bearing shaft ( 11 ). a lever arm ( 16 ) provided in the upper part of the motor shaft ( 15 ) and extending outward from said shaft in a radial direction is formed to be able to pull said exiting cord ( 7 ′) into the boat hull ( 1 ). by means of this lever arm ( 16 ), following are provided : pulling the fender ( 6 ) into the boat hull ( 1 ) when the cover ( 4 ) is closed and taking the fender ( 6 ) out of the boat hull ( 1 ) when the cover ( 4 ) is opened . the cord ( 7 ′) stepping out the roller bearing shaft ( 11 ) is conveyed through the lever arm ( 16 ), is passed through a hole ( 17 ) opened on farther end of the lever arm ( 16 ) from the motor shaft ( 15 ) and is directed to a ring ( 18 ) positioned over the housing ( 3 ) for passing through it . in the event that the cover ( 4 ) is completely closed , farther end of the lever arm ( 16 ) from the motor shaft ( 15 ), when viewed from the top , horizontally faces left according to the embodiment in the figures and in the event that the cover ( 4 ) is completely opened , farther end of the lever arm ( 16 ) from the motor shaft ( 15 ) horizontally faces right . in other words , the lever arm ( 16 ) can perform a displacement of 180 ° for pulling the fender ( 6 ) into the boat hull ( 1 ) or taking said fender out of said place . said exiting cord ( 7 ′) can be used for the position control of the fender ( 6 ). as a matter of fact , according to an embodiment of the present invention , if the cord ( 7 ′) provided in the lower part of the fender ( 6 ) is united with the cord ( 7 ) provided in the upper part ( in a single piece or if said cords are connected to each other ), the fender ( 6 ) moves upward when the cord ( 7 ′) provided in the lower part is stretched , and thus a safer cushioning based on the form of the external object can be provided . if the cord ( 7 ′) is released , the fender ( 6 ) moves downward and a cushioning suitable for this situation can be provided . this completes the description of the preferred and alternate embodiments of the invention . those skilled in the art may recognize other equivalents to the specific embodiment described herein which equivalents are intended to be encompassed by the claims attached hereto .