216 results about "Yachting" patented technology

A portable marine lift capable of multi-directional off-loading of yachts, ships, and other marine vessels at ground level to dry-dock them. It is compact and barge-like, and can be shared by independent shipyards, or used to expand the work area within a single port facility or shipyard. It is also self-contained when fitted with generators and / or propulsion means via add-on pods, and comprises independent platform sections joined together to meet any hull design, length and water depth. Platform sections have the ability to submerge, and may also be employed to capture and temporarily contain environmentally hazardous materials commonly produced by shipyards. In addition, the platform sections are preferably open-framed for weight savings. Computerized lifting, via multiple lift modules secured to platform sections, assures lifting of vessels in substantially level orientation. Optionally, platform sections can be configured for shallow water operation, with locking devices, and / or guides usable for off-loading railway alignment.

The present invention describes a composition of thermosetting resins, in particular epoxy resins, combined with modified polysiloxane networks to form a continuos interpenetrated network characterized by the presence of metals such as boron, molybdenum and tungsten, linked to Si via an oxygen atom. These compositions, can be used to make adhesives, composites and coatings that exhibit excellent hardness, chemical resistance, fast curing, damp tolerance and are self priming with slow release of a corrosion inhibitor or of functional additives. The material of the present invention can be used in particular as a coating, in the marine field, for yachts and for large metal vessels, such as oil tankers and more in particular for cargo or ballast tanks and on hulls. It can be used for the maintenance and protection of trains, automotive vehicles and in electric applications such as for the production of dielectric shields and in those fields where high performance is needed.

A wireless remote control system enables precise control of a yacht, or other vessel, from virtually any point on the yacht. A hand-held transmitter includes various switches for controlling the engines, thrusters, and / or anchor winch. A receiver, mounted on the yacht, receives signals from the transmitter. The receiver generates outputs that are connected to the existing electronic controls of the yacht. Thus, the receiver is connected in parallel with the conventional electronic controls of the yacht, and the system acts in addition to, and not instead of, the conventional control system. The system can thus be installed on existing vessels without modification of such vessels. An acoustic alarm signal is generated by the receiver when radio communication between the transmitter and receiver is severed.

The present invention relates to a vertical axis turbine 1 apparatus for converting movement of a fluid into electrical power and a method of manufacture of a turbine. The turbine can be installed on a flexible line 2, such as a cable, rope or stay. It could be used on the stay of a yacht. The main rotor 13, 14 of the turbine has least two helical blades arranged about the longitudinal axis with rotational symmetry, the blades being substantially identical in shape and having a lift-producing cross-sectional shape at least along a part of their longitudinal length. A generator 22 coupled to the main rotor 13, 14 and is contained in a generator housing 23.

The present invention is the method of making hull of fishing boat and yacht with basalt fiber reinforced material. The material used includes twist-less basalt rove or fabric, unsaturated polyester resin or epoxy resin, promoter and other supplementary material. The making process includes spreading the basalt material, spraying resin, curing, demolding and other steps. The basalt fiber has acidand alkali resistance, heat stability, tensile strength and other mechanical performance superior to those of common glass fiber. Making hull of fishing boat and yacht with basalt fiber reinforced material can result in improved performance and lowered cost.

A streamlined amphibious, catamaran yacht is provided that may serve military or civilian purposes as a passenger or cargo carrying truck, limousine, bus, motor home or recreational vehicle on land, and extend those same functions on water, while matching the functionality and performance of similar length boats. The amphibious yacht includes a continuous reveal on the hull bottom from bow to transom that separates two asymmetric catamaran hulls. This reveal, or hull tunnel, may enhance sea stability and maneuverability, and create lift that helps the hull achieve plane and attain higher water speeds.

A multi-function winch for handling multiple lines of the running rigging of a sailing yacht. The winch incorporates multiple winch drums capable of releasing, retrieving and storing working lines of the yacht. The multiple winch drums are mounted in an axially stacked relation on a single drive shaft. Individual ones of the drums can be engaged to be driven by the main shaft of the winch, while the others remain stationary or, where appropriate, free wheel and controllably release lines stored thereon. A rotatable selector lever, located at the top of the winch, is manipulated to engage a selected drum for driven operation. Level wind features can also be provided to assure neat and compact winding of retrieved lines.

A method is provided for forming a high strength synthetic rope useful for towing warps, trawler warps, yachting ropes, mooring lines, anchor lines, oil derrick anchoring lines, seismic lines, seismic lines and any other uses for rope, cable or chain.

The invention discloses a variable double-body air cushion yacht. The variable double-body air cushion yacht comprises two piece bodies, a connecting bridge arranged between the two piece bodies, a supercharging chamber arranged in the connecting bridge, an airbag recovery cabin arranged at the peripheral side of the supercharging chamber, and an air cushion cabin arranged below the supercharging chamber, wherein the supercharging chamber consists of multiple supercharging sub-chambers; air ways are formed between the adjacent supercharging sub-chambers; hoisting fans are correspondingly communicated above all the air ways; the supercharging sub-chambers and the adjacent air ways are communicated through air way pipes; airbags are arranged in the airbag recovery cabin, and are communicated with the air ways; meanwhile, multiple air stop devices communicated with the air cushion cabin are arranged at the bottoms of the supercharging sub-chambers; when the hoisting fans are started, air flows to the airbags by the air ways, and flows to the corresponding supercharging sub-chambers by the air way pipes; and when the air in the supercharging sub-chambers bursts through the air stop devices, the air enters the air cushion cabin to form an air cushion. The variable double-body air cushion yacht has the advantage of realizing free conversion between a double-body ship form and a local air cushion double-body ship form or a full cushion hoisting type air cushion double-body ship form through controlling the folding and the unfolding of the air cushion.

The invention relates to a foamed polyolefin composition and a polyolefin foamed material, a preparation method of the foamed polyolefin composition and a product prepared by adopting the polyolefin foamed material. The foamed polyolefin composition contains polyolefin resin, a crosslinking agent system and an organic chemical foaming agent system, wherein the crosslinking agent system is a mixture of at least two organic peroxide crosslinking agents, and relationships among a melting point Ta of polyolefin resin, a decomposition temperature Tb of the organic chemical foaming agent system and typical crosslinking temperatures Tc1 and Tc2 of at least two organic peroxide crosslinking agents in the crosslinking agent system satisfies the relationship: Ta<Tc1<Tb<Tc2. Selection of the polyolefin resin in the foamed polyolefin composition provided by the invention is not limited to high melt strength polyethylene, selectivity of foamed resin is enhanced, and industrial production is facilitated; meanwhile, the prepared foamed polyolefin composition also has high crosslinking degree and high foaming ratio and is especially applicable to high-end products for automotive body filling, an incubator, a yacht, large-scale seafood and the like.

The invention belongs to the technical field of loudspeakers, and particularly relates to a loudspeaker for a yacht. The loudspeaker for a yacht mainly comprises a vibration system and a magnetic path system, wherein the vibration system is composed of a voice coil, a diaphragm, a basin, a surround, a positioning support and a dustproof cover; the magnetic path system is composed of a magnetic bowl, a magnetic conductance sheet, a main magnetic steel, an auxiliary magnetic steel, and a copper sleeve; the top end of the voice coil is connected with the inner edge of the diaphragm; the bottom end of the voice coil extends to the bottom side of the magnetic conductance sheet; the upper end of the diaphragm and the inner edge of the surround are adhesive; the outer edge of the surround and the basin are adhesive; a connection structure is arranged at the basin corresponding place; the outer side surface of the surround is an oblique surface; the main magnetic steel and the auxiliary magnetic steel are arranged with opposite magnetism, the strength of the magnetic field is enhanced, and the sensitivity of the loudspeaker is enhanced.

A power or manually operated winch mechanism for handling the running rigging lines of a sailing yacht. The winch includes a winding drum, operating in conjunction with a level wind mechanism, which winds and stores the line during line retrieving operations and controllably releases the line when desired. Novel level wind features enable the lines to be appropriately tensioned during retrieval, to assure proper windup of the line in organized coils on the drum. During line release, the line is placed under tension by the level wind mechanism and thus positively drawn from the unwinding winch drum even when the line is not under load from the sail to which it is attached. The arrangement enables lines to be automatically released from one winch and retrieved on a second which, under a common control, as when tacking or resetting the sails of a yacht, all without the necessity of any physical line handling by crew members, resulting in a significant improvement in the safety and convenience of the crew. The new winch mechanism preferably includes a novel alternate arrangement for manual operation of the system in the event of a failure of the power system.

The invention discloses a yacht having an oil slick recovery device. The yacht comprises a yacht body, and a cabin, a deck, a cab and a dining room arranged on the yacht body. The yacht is characterized in that brackets are arranged at the periphery of the yacht body; each bracket is connected with a telescopic arm of one hydraulic oil cylinder fixed on the yacht body; at least two horn-shaped oil collecting cylinders are arranged on the bracket; and oil sucking ports are formed in the upper parts of the oil collecting cylinders, and are connected with a negative-pressure oil collecting tank on the yacht body by oil sucking pipes. When the yacht is used and positioned on a water surface polluted by oil slick, the hydraulic oil cylinders are controlled to position the oil collecting cylinders on the oil slice layer, and electromagnetic valves are opened to feed the oil slick into the negative-pressure oil collecting tank so as to realize the recovery of the oil slick on the water surface; and the yacht has such advantages as quick recovery speed, low recovery cost and good effect on the treatment of the oil slick on the water surface.

The invention discloses a multi-functional composite plate with functions of fire prevention, sound insulation and corrosion prevention, and a preparation method. The multi-functional composite platecomprises an anti-flaming veneer of a layered structure, a high-strength glass fiber net, a damp rubber plate, a sound insulation pad, an anti-flaming solid wood core plate, an anti-flaming baseplateand an anti-damp baseplate balance layer which are disposed successively from top to bottom, wherein each plate layer is adhered together by improved macromolecule WBP anti-flaming waterproof glue. The composite plate disclosed by the invention is characterized by being fireproof and anti-flaming, waterproof and anti-damp, resistant to damping, capable of sound insulation, environment-friendly orthe like and can be well applied to the manufacturing industry and high-grade decorated floor structures. The composite plate disclosed by the invention adopts the WBP environment-friendly glue, has good weather resistance and waterproof performance, has good environment-friendly performance, can be applied to all the damp and water-existing environments with fire-proof requirements, such as a coastal hotel holiday village, construction of a wood structure house, a garden architecture, a cruise ship, internal decoration of a yacht and a ship, ship industrial manufacture, further manufacture and other decoration projects, and has a wide scope of application.

The invention discloses a zone-adjustable sunshade yacht, comprising a yacht body, four opening and closing plates, an opening and closing drive mechanism, and two shielding plates; when the middle of the upper end of the yacht body needs to be shaded, the two sunshade plates can be Rotate to the inside and the middle, so that the two sun visors form a docking structure, and the plug-in strip and the plug-in groove are matched to form a seal; when it is necessary to shade the two sides of the upper end of the yacht body, the two sun visors can be rotated to the outside. , through the T-shaped opening and closing locking screw rotating abutting and connecting to the inner side wall of the driving slot, thus realizing the locking of the opening and closing rotating rod, so that the structure of the sun visor is stable, so the present invention realizes the adjustable sun shading position and realizes the partitioning Shading effect.

A lever-support bracket apparatus for a small waterboat allows a lever-support bracket and a socket section to be increased in strength and rigidity, by combining these functions in a single unitary apparatus. Using the described apparatus, a lever-support bracket and a socket section can be laid out rather easily, and the number of members can be reduced. With a lever support bracket apparatus 30, a reverse operation lever 34 is allowed to operate a reverse bucket 21, and the reverse operation lever 34 is arranged proximate the front end of a seat 23 and is attached, to swing freely, to a hull 11 using the lever-support bracket 31. Further, to the lever-support bracket 31, a socket section 55 is formed, to be a piece therewith, into which a tongue-shaped piece 51 at a front end 50 of the seat 23 can be inserted.

A yacht engine cabin vibration absorber structure is characterized in that the yacht engine cabin damper comprises a base (1), a vibration absorbing port (2), a spring (3), a first baffle plate (8) and a second baffle plate (7), wherein the first baffle plate (8) and the second baffle plate (7) are used to formed a horizontal limitation space and the first baffle plate (8) and the second baffle plate (7) are fixingly connected to a supporting plate (9) in a vertical way; at least a part of the first baffle plate (8) and the second baffle plate (7) is inserted into the horizontal limitation space for defining the horizontal displacement of the supporting plate (9); two ends of the first baffle plate (8) and the second baffle plate (7) are respectively fixingly connected to a first buffer plate (11) and a second buffer plate (12) through a self-tapping bolt; a piston (3) is set in the middle of the a damper; upper and lower ends of a piston (6) are provided with springs (3); a round ring on the bottom end of the spring (3) are connected to the piston (6) through a stab portion; and two round magnetic bodies (4) are set inside the piston (6). According to the invention, the vibration isolation effect is realized when a vibration component regularly runs; and the horizontal displacement of the vibration component is ensured to not occur when an earthquake occurs or strong impact is applied, thus the vibration component and the surrounding components and apparatus are ensured not to be damaged.

The invention relates to an acrylate adhesive which is a double component adhesive. The acrylate adhesive comprises an oxidizing agent and a reducing agent, wherein the oxidizing agent is prepared from the following components in percentage by weight: 25-60% of an acrylate monomer containing at least one vinyl, 5-50% of an elastomer, 0.5-20% of an initiator, 0.1-5% of a stabilizer and 0-30% of epoxy resin; the reducing agent is prepared from the following components in percentage by weight: 25-60% of an acrylate monomer containing at least one vinyl, 0-25% of methacrylic acid, 0-50% of an elastomer, 1-10% of an accelerant, 0.1-5% of a stabilizing agent, 0.01-2% of organic salt of transition metal, 0-30% of epoxy resin and 1-10% of a sealing agent, wherein the volume ratio of the components of the oxidizing agent and the reducing agent is 1:10. The adhesive provided by the invention has the advantages that volatilization of main compositions can be reduced under the condition of guaranteeing relatively long operating time, and reduction of shear strength is effectively prevented after aging by salt mist, so that the sea water salt mist resistance of a yacht is improved.

A method and device for maneuvering a yacht via a control device which is designed as a joystick (7). The joystick (7) is tilted in the direction of a longitudinal axis (y) and a transversal axis (x) of the yacht, to initiate forward or backward movement and transverse movement, and the joystick (7) is rotated to initiate yaw movement of the yacht around its longitudinal axis (zj). The yacht (1) has a single drive which is designed as a pivotable drive (6) which has a pivotable thrust vector around a vertical axis. The steering movements of the joystick (7) are transferred to the pivotable drive (6) in a matched manner.

The invention discloses a corrosion-resistant halogen-free flame-retardant unsaturated polyester resin and a preparation method thereof. The corrosion-resistant halogen-free flame-retardant unsaturated polyester resin is prepared from unsaturated polyester resin, an initiator, filler, a diluent, a flame retardant and a corrosion-resistant auxiliary agent. As the material does not contain halogen,more toxic gas cannot be released during combustion. The flame retardant is metal nano hydroxide, the corrosion resistance of the unsaturated polyester resin can be effectively improved, and the service life of the unsaturated polyester resin is prolonged. In addition, by adding part of modified alumina ceramic powder as the filler, the mechanical strength of the unsaturated polyester resin can befurther strengthened, the aging resistance and ultraviolet radiation resistance are improved, and the corrosion-resistant halogen-free flame-retardant unsaturated polyester resin is not prone to aging. The halogen-free flame-retardant unsaturated polyester resin has the characteristics of good strength, high heat resistance, corrosion resistance and the like, and can be used in the fields of automobiles, wind power, high-speed railways, yachts, buildings, shipbuilding, chemical equipment, electronic appliances and the like.

An apparatus for inhibiting and removing marine deposits from a submerged portion of a boat or yacht include a submersible stainless steel frame having a plurality of sections extending longitudinally and transversely under the submerged portions of a watercraft and a plurality of nozzles disposed on said sections of the frame to direct a stream of air bubbles toward and against the submerged portion of the watercraft. The apparatus also includes an air compressor, a battery and a solar source of energy for charging the battery to power the air compressor. A plurality of valves and hoses are also provided for connecting each of the nozzles to the air compressor through one of the valves to thereby control the flow of air to each of said nozzles on each of said sections of the frame. A mechanism for positioning the frame and nozzles at about 40 cm away from the lowest point of a watercraft is provided as well as a timer for periodically starting and stopping the flow of air to the nozzles.

The invention provides a water body internal circulation yacht harbor basin, and a ship lock for the water body internal circulation yacht harbor basin. The ship lock comprises a lock chamber, an inner lock gate and an outer lock gate, as well as a water conveyance system, wherein the lock chamber and the closed harbor basin are isolated by the inner lock gate, and the outer lock gate is used for isolating the lock chamber from an external water body; and the water conveyance system is used for injecting water of the closed harbor basin into the lock chamber, and sending the water in the lock chamber back to the yacht harbor basin. According to the water body internal circulation yacht harbor basin, the harbor basin is arranged in a land area, office, convention and exhibition facilities, apartment hotels, shipping entertainment and commercial facilities can be built around the harbor basin through communicating the lock chamber with the external water body, and the ship lock, namely, the traditional navigation hydraulic architecture, is landscaped.

The invention relates to the technical field of boat anchors, and discloses a novel yacht anchor convenient to fold and unfold. The yacht anchor comprises a box body, a spring is fixedly installed onthe inner bottom wall of the box body, knife rest rods are fixedly connected to the right side of the spring, a threaded rod is inserted into the box body in a penetrating mode, a gear rod is movablyconnected to the outer portion of the threaded rod, blades are fixedly installed on the opposite sides of the two knife rest rods, and a transmission box is fixedly connected to the top of the box body. The invention discloses a novel yacht anchor convenient to fold and unfold. In the falling and ascending processes of the threaded rod, when the chain rotates, the supporting rod can be driven to move, the teeth of the supporting rod can drive the circular gear to rotate through meshing with the chain, the riveting claw is made to contract or expand, under the cooperation of the brake gear andthe brake rod, the riveting claw cannot automatically contract in a severe environment, and therefore the effects of being free to contract and release and high in safety are achieved.

The invention discloses a vacuum formation preparation method for a yacht. The vacuum formation preparation method for the yacht includes the steps of cleaning, waxing, get coating spraying, lamination, vacuum laying-up, grinding and trimming and mold releasing. On the basis of traditional hand lay-up molding, formation of the yacht is carried out through a vacuum injection process. The vacuum formation preparation method not only has the advantages of traditional and lay-up molding that construction is easy, requirements for a mold are low, and maintenance is easy, but also reduces use of resin in the preparation process, reduces volatile components in the preparation process, is more environmentally friendly, and enables the resin to be distributed more evenly and produced products to be higher in mechanical property, better in waterproof performance and higher in quality.

The invention discloses yacht underwater cleaning equipment. The equipment comprises a river bank, wherein a sea area is arranged in the river bank; seawater is stored in the sea area; a yacht is arranged on the upper side of the seawater in a floating manner; a drainage mechanism is arranged in the sea area; the drainage mechanism comprises a cleaning box; the left end and the right end of the cleaning box are each fixedly provided with a lifting plate; and each lifting plate is fixedly connected with a lifting hydraulic rod. Underwater cleaning of the yacht is achieved in a mechanical cooperation mode, and the rapid cleaning effect on the yacht is remarkable; the drainage mechanism is arranged in the yacht cleaning equipment and can be used for draining water of the cleaning box; a supporting mechanism can be used for alternately supporting and cleaning the yacht; and a yacht cleaning mechanism can be used for cleaning the yacht. The equipment is low in cost, simple in structure, high in automation degree and suitable for large-area popularization.

The invention discloses a yacht dolphin motion real-time simulation method in a yacht simulator. The yacht dolphin motion real-time simulation method comprises the following steps: reading yacht design parameters; calculating a steady motion state of the yacht in still water; calculating hydrodynamic coefficients of two-degree-of-freedom motions of heaving and pitching of the yacht; judging the boundary condition of the yacht dolphin motion based on the Routh-Hurwitz linear stability criterion; and the yacht dolphin is stimulating generation of the dolphin motion of the yacht by using a manualintervention method. According to the method, the yacht stress is analyzed based on a flat plate sliding theory by starting with the essence of high-speed movement of the yacht; the hydrodynamic coefficients of heaving and pitching of the yacht in a high-speed motion state are calculated based on a high-frequency free liquid level hypothesis; and the solved hydrodynamic coefficients of the yachtare transmitted to a yacht simulator system to calculate the real-time motion attitude of the yacht; and the yacht simulator is finally driven to operate in cooperation with the vision of the yacht simulator, so that the simulation real-time requirement of the yacht simulator is met, and the precision requirement of the yacht simulator is also met.

The invention relates to the technical field of ships and marine science and technology and automatic control, and discloses an active displacement compensation type ultra-stable quadruple ship which comprises a separated main ship body, a main ship body, a main ship body and a main ship body, the four independent sheet bodies are used for being placed in water to support the main ship body and installing power facilities such as turbo-electro-mechanical devices and the like; the central bearing column (C column) is used for bearing the structural stress of the whole ship and is connected with the sheet bodies, the main ship body and other parts; the executing mechanism is used for pushing or pulling the sheet body to move up and down under the control of a program; and the ultra-stable control method is used for controlling the actuating mechanism to act. According to the active displacement compensation type ultra-stable quadruple ship, the ship can be kept in a stable state in waves, it is guaranteed that advanced technical equipment such as a camera, laser, sonar and a mechanical arm on the ship body can operate efficiently, and riding comfort and life safety of carried passengers are guaranteed; the boat can be widely applied to the fields of unmanned boats, speed boats, private yachts, official business boats, scientific experiment boats and the like.

The invention discloses a leisure, sightseeing and breeding platform with a dock, and relates to mariculture and marine sightseeing, tourism and leisure. The leisure, sightseeing and breeding platformcomprises a buoyancy frame formed by connecting buoyancy stand columns and horizontal buoyancy pipes, the frame is provided with a culture net; a net bag culture pond, a free-ranging pond, a wind driven generator, a beacon light and recreational and catering facilities are arranged on a deck, the deck is provided with a yacht dock and an official ship dock, and two wave absorbing walls are arranged on the left side edge, the right side edge and the bow of the deck. Wave absorbing walls are arranged on the left side, the right side and the front part of the dock. The wave absorbing walls arecomposed of a U-shaped steel pipe with a U-shaped section and a closed top. The beneficial effects of the invention are that the yacht dock and the official ship dock are arranged; the wave absorbingwalls are arranged on the periphery of the platform and the side wall of the dock, the flow baffles are arranged on the two sides of the bow, the yacht and the official ship berthed in the dock can bestable and safe, the aquaculture net cage and the aquaculture net bag are arranged on the underwater part of the ship, the wave absorbing walls and the flow baffles provide a stable water environmentfor cultured organisms, and growth of the aquatic organisms is facilitated.

The invention discloses an open-top sightseeing yacht and belongs to the field of sightseeing ships. The open-top sightseeing yacht comprises a ship body assembly, a passenger cabin of the ship body assembly is provided with a ceiling capable of being movably opened, the section of the ceiling is of an inverted-U-shaped structure, and the two sides of the ceiling are mounted on the ship body assembly through a sliding mechanism capable of enabling the ceiling to move in the front-back direction along the ship body assembly. The ship body assembly is further provided with an open-top driving mechanism capable of driving the ceiling to be opened and closed. The open-top driving mechanism is internally provided with a clutch mechanism capable of enabling the ceiling to be switched between manual opening and closing and automatic opening and closing and further provided with a ceiling positioning mechanism capable of locking the ceiling position. The ship body passenger cabin is provided with the ceiling capable of being opened movably, so that an open-top sightseeing state is provided for the sightseeing yacht, the repression sense of passengers is lowered, the riding comfort and sightseeing effect of the passengers are improved, and the blank that the top of a traditional sightseeing yacht cannot be opened is made up; and operation is easy and convenient, and the safe and reliable effects are achieved.

The invention provides a novel hidden-type swimming ladder device. A hidden box of a swimming ladder is arranged at an adjacent water rear platform of a yacht; a box cover of the hidden box is further formed as a platform plate capable of opening and closing of the rear platform; a swimming ladder collection space of the hidden box is arranged below the box cover of the rear platform; the swimming ladder collection space is provided with a rear-end swimming ladder exit; a swimming ladder moving vehicle is arranged in the hidden box; the moving vehicle can moves to the position close to the rear-end swimming ladder exit and is located; and the swimming ladder is arranged on the moving vehicle and is rotatably connected with the moving vehicle to rotatably lower the swimming ladder and rotatably rise and retract the swimming ladder. According to the novel hidden-type swimming ladder device, the hidden box of the swimming ladder is designed in the rear platform of a deck, a designed slideway sliding block is arranged in the swimming ladder and is installed in the hidden box for sliding front and back, so that the swimming ladder slides out to the tail end of the hidden box to rotatably lower during using and rotatably rise so that the swimming ladder is slid into the hidden box after being used; the deck utilization ratio, the space utilization ratio and practicability of the yacht are increased, storage and water-in and water-out of the swimming ladder are safe, operation is convenient, and the appearance is more attractive.