An underwater scooter includes a scooter body, a duct, a motor, and a propeller. The scooter body includes a body part, a side part defining a first through hole, and a plurality of stopping members disposed on an inner wall of the first through hole. A gap is defined between every two adjacent stopping members. The duct includes a surrounding member defining a second through hole, a supporting member connected to an inner wall of the surrounding member, and a plurality of engaging members disposed on an outer wall of the surrounding member and spaced apart from each other. Each of the plurality of engaging members passes through a corresponding gap between two adjacent stopping members and abuts against two opposite sides of a corresponding one of the plurality of stopping members after rotating with respect to the corresponding one of the plurality of stopping members.

An underwater scooter includes a scooter body, a duct, a motor, and a propeller. The scooter body includes a body part, a side part defining a first through hole, and a plurality of stopping members disposed on an inner wall of the first through hole. A gap is defined between every two adjacent stopping members. The duct includes a surrounding member defining a second through hole, a supporting member connected to an inner wall of the surrounding member, and a plurality of engaging members disposed on an outer wall of the surrounding member and spaced apart from each other. Each of the plurality of engaging members passes through a corresponding gap between two adjacent stopping members and abuts against two opposite sides of a corresponding one of the plurality of stopping members after rotating with respect to the corresponding one of the plurality of stopping members.

An underwater scooter includes a scooter body, a duct, a motor, and a propeller. The scooter body includes a body part, a side part defining a first through hole, and a plurality of stopping members disposed on an inner wall of the first through hole. A gap is defined between every two adjacent stopping members. The duct includes a surrounding member defining a second through hole, a supporting member connected to an inner wall of the surrounding member, and a plurality of engaging members disposed on an outer wall of the surrounding member and spaced apart from each other. Each of the plurality of engaging members passes through a corresponding gap between two adjacent stopping members and abuts against two opposite sides of a corresponding one of the plurality of stopping members after rotating with respect to the corresponding one of the plurality of stopping members.

An underwater scooter includes a scooter body, a duct, a motor, and a propeller. The scooter body includes a body part, a side part defining a first through hole, and a plurality of stopping members disposed on an inner wall of the first through hole. A gap is defined between every two adjacent stopping members. The duct includes a surrounding member defining a second through hole, a supporting member connected to an inner wall of the surrounding member, and a plurality of engaging members disposed on an outer wall of the surrounding member and spaced apart from each other. Each of the plurality of engaging members passes through a corresponding gap between two adjacent stopping members and abuts against two opposite sides of a corresponding one of the plurality of stopping members after rotating with respect to the corresponding one of the plurality of stopping members.

Systems and methods to allow a user to be both towed by and control a personal flotation craft from behind and underneath while engaging in underwater exploration comprising one or more propulsion devices, an optionally foldable tow shaft and one or more directional controllers. Wherein the systems and methods may further comprises one or more remotely controllable speed modulators, controlled by a user from behind and underneath the personal flotation craft, while engaging in underwater exploration.

Systems and methods to allow a user to be both towed by and control a personal flotation craft from behind and underneath while engaging in underwater exploration comprising one or more propulsion devices, an optionally foldable tow shaft and one or more directional controllers. Wherein the systems and methods may further comprises one or more remotely controllable speed modulators, controlled by a user from behind and underneath the personal flotation craft, while engaging in underwater exploration.

An underwater motive device includes a rear main housing including two side handle bars, a forward joining member having a decreased diameter, a shoulder between the forward joining member and a remaining portion of the rear main housing, a battery compartment defined in both the forward joining member and the remaining portion of the rear main housing wherein the forward joining member includes an annular front end, an annular front surface between the annular front end and the shoulder, two opposite first rails on a joining portion of the annular front end and the annular front surface, and a first space on the annular front surface and abutting each first rail; and a front cone including a rear opening, an internal, annular surface on a rear portion, and two opposite sets of a second rail and a second space.

An underwater motive device includes a rear main housing including two side handle bars, a forward joining member having a decreased diameter, a shoulder between the forward joining member and a remaining portion of the rear main housing, a battery compartment defined in both the forward joining member and the remaining portion of the rear main housing wherein the forward joining member includes an annular front end, an annular front surface between the annular front end and the shoulder, two opposite first rails on a joining portion of the annular front end and the annular front surface, and a first space on the annular front surface and abutting each first rail; and a front cone including a rear opening, an internal, annular surface on a rear portion, and two opposite sets of a second rail and a second space.

The invention relates to a swimming and diving aid, having a hull which comprises a flow channel or with which a flow channel is associated, a motor-driven water acceleration arrangement, in particular a propeller, being associated with the flow channel; having a support surface for an upper body on an upper side of the hull; having grips mounted on the swimming and diving aid, control elements for controlling the water acceleration arrangement by means of an associated motor controller being provided on the grips; and having a display, facing toward the support surface, for showing operating parameters of the swimming and diving aid. Provision can be made in this context that a forward-directed front camera is integrated into the hull in front of the support surface in a direction of travel, and is connected to an electronic control system; that the electronic control system is embodied to apply control to the front camera and to receive camera signals; and that a switching element for starting and ending a video capture is arranged on at least one grip. The invention makes possible the acquisition of video captures in the travel direction of the swimming and diving aid.

The invention relates to a swimming and diving aid, having a hull which comprises a flow channel or with which a flow channel is associated, a motor-driven water acceleration arrangement, in particular a propeller, being associated with the flow channel; having a support surface for an upper body on an upper side of the hull; having grips mounted on the swimming and diving aid, control elements for controlling the water acceleration arrangement by means of an associated motor controller being provided on the grips; and having a display, facing toward the support surface, for showing operating parameters of the swimming and diving aid. Provision can be made in this context that a forward-directed front camera is integrated into the hull in front of the support surface in a direction of travel, and is connected to an electronic control system; that the electronic control system is embodied to apply control to the front camera and to receive camera signals; and that a switching element for starting and ending a video capture is arranged on at least one grip. The invention makes possible the acquisition of video captures in the travel direction of the swimming and diving aid.