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HV235S: Self-Righting Rescue Boat

Issuing time:2026-11-03 09:05Author:HVON Boat AI Application Center

Capsize risk changes the whole response flow

A remote-controlled rescue boat keeps responders out of the first contact phase, but it still operates among wind, current, floating debris and vessel wake. If a craft capsizes away from the bank, the difficult part is not simply lifting the hull. The team must restore a usable rescue platform without adding another person to the water. The HV235S adds an integrated self-righting device to the HV235 platform. When the craft capsizes, the airbag system is designed to change buoyancy and shift the vessel back toward an upright attitude, giving the operator a chance to resume remote control, observation and towing.

Self-righting should not be described as a guarantee in every sea state. Whether the craft returns upright, how long it takes and whether it can continue the mission depend on the model, load distribution, installation, battery condition and project testing. Buyers should evaluate the capability as part of a complete launch, operation, recovery and maintenance workflow.

Start with the HV235S specification and quotation page to compare dimensions, load and propulsion with the local launch point, communication conditions and recovery method. The HV235S product page on qdhvon.com provides an additional view of the same model family.

The HV235S platform

The inflated HV235S measures approximately 2,350 by 1,020 by 920 mm and folds to about 1,100 by 550 by 300 mm. Its dry weight is around 50 kg, with a load capacity above 150 kg. Water-jet propulsion leaves no exposed propeller. The published maximum speed is about 40 km/h empty and 20 km/h with one person. Range is listed as more than 20 km, and the remote-control range is more than 2 km line of sight. A five-second battery hot swap allows spare packs to extend a duty period.

These figures define a specific role: one person can transport and deploy the craft, reach a person in the water, establish buoyancy and begin a tow before a larger vessel or shore team completes the recovery. The HV235S is not a substitute for a large rescue boat, and it should not be pushed beyond its approved load, weather or communication limits. The final configuration should also be checked for chamber layout, deck space, camera, searchlight, loudspeaker, tow points and spare-battery plan.

HV235S remote-controlled rescue boat with integrated self-righting system

Where self-righting fits in the mission

A normal mission still begins with planning, checks and low-speed testing. The operator confirms tube pressure, jet intake condition, battery locks, control link and recovery access, then checks steering, stop and return functions in safe water. When approaching a person in the water, the craft should move slowly and keep a safe distance while using the hull and grab points to make contact. Avoid bringing the propulsion area close to the casualty. Once a person is aboard, load increases and the response to steering and speed changes. The return leg should therefore be planned more conservatively.

After a capsize, the operator should stop commanding propulsion, record the position, warn people nearby and observe the self-righting sequence. Do not accelerate immediately after the craft returns upright. First confirm that the hull is stable, the airbag and cylinder assembly are intact, the battery remains secured, the jet is clear, there is no significant water ingress and the control link responds. Resume at low speed only if those checks pass and the local conditions allow it. If righting does not occur, the craft keeps drifting or communications fail, move to the agreed recovery plan.

Inflatable self-righting system capsize recovery sequence

Ports and floods are different problems

A port or harbour usually has defined boundaries, quay structures and vessel wake, but floating lines, mooring hardware and low walls can still restrict the approach. Port work places more emphasis on patrol frequency, radio coverage, night identification and coordination with shore staff. The team should mark safe launch points, restricted areas, recovery platforms and emergency tow routes. A route used in open water should not be copied directly into a channel between berths.

Flood response changes faster. Water level, current, debris and shoreline access can shift within a short period, and a previously usable slipway may become submerged or blocked. Portability, rapid inflation and battery rotation are valuable here, but the risk assessment must be stricter. Current pushing against the hull, branch entanglement, bridge-pier eddies and radio shadows can reduce the practical control range. Set a conservative return threshold before launch. Both port and flood teams can begin with the Water Rescue Solutions page, then compare launch, operation and recovery requirements before choosing equipment.

Six checks before purchase

First, confirm that load and deck layout support one casualty lying flat, plus grab points and towing. Second, review jet-intake protection and maintenance in shallow or weedy water. Third, verify the self-righting installation, activation logic, cylinder capacity and post-use reset procedure. Fourth, confirm spare-battery quantity, charging arrangements and that hot swapping will not damage seals. Fifth, test the control link, video and camera modules at the actual site rather than relying on a nominal distance. Sixth, write the transport, launch, recovery and training plan, especially for single-operator use.

Buyers comparing rescue boats, workboats and unmanned craft in one task framework can continue to the self-righting product line on HVON Expo. Final compatibility should be confirmed against hull drawings, load calculations and project testing.

Put the safety limits in writing

A practical operating card should list approved and prohibited waters, maximum wind, wave and current, minimum visibility, maximum load, control and video checks, capsize commands, the post-righting inspection order, recovery points and contacts. Record battery use, mission time, load, anomalies and hull checks after every deployment. Leave time for inspection and charging between missions. Self-righting creates more room for recovery, but it does not replace training, maintenance or local judgement.

Qingdao HVON Boat Co., Ltd. can discuss the HV235S around port, flood, inland-water and coastal rescue tasks. For specifications, scope of supply or a project quotation, use the HVON Expo enquiry page and include the operating water, load, launch method and destination country.