HS-S4 Dual-Motor Electric Underwater Scooter – Vector Bat Scooter

Vector Water Craft Professional High-Performance Electric Diver Propulsion Vehicle

The HS-S4 Underwater Scooter is the advanced long-range, high-thrust model in the Vector Water Craft diver propulsion range, engineered for divers and professional operators who require greater speed, extended endurance and uncompromising reliability in demanding underwater environments. Designed as a step above compact recreational scooters, the HS-S4 delivers a powerful blend of performance, control and structural durability, making it ideally suited for long-distance exploration, instructor support, inspection work and professional dive operations.

Built as a serious underwater mobility platform rather than a casual accessory, the HS-S4 allows divers to travel further, conserve energy and operate more safely by providing smooth, consistent propulsion across extended dive cycles. It is a platform designed not only for enjoyment, but for productivity, safety and professional-grade performance beneath the surface.

Whether supporting technical training, surveying large reef systems, assisting instructors during complex exercises or performing structured inspection and search tasks, the HS-S4 provides the speed, range and confidence required for advanced underwater missions.

Advanced Hydrodynamic Body for Speed and Long-Range Efficiency

The HS-S4 features a refined hydrodynamic housing designed to reduce drag while maximising directional stability and propulsion efficiency. The elongated nose profile and carefully engineered intake geometry guide water smoothly into the propulsion duct, improving thrust conversion and reducing turbulence around the diver.

Balanced internal mass placement ensures neutral trim and straight-line tracking without constant corrective input, allowing the unit to glide naturally through the water. This reduces wrist strain, lowers energy consumption and significantly extends effective operating range. The slightly larger body profile allows the HS-S4 to accommodate a more powerful propulsion system and higher-capacity battery pack while maintaining excellent manoeuvrability.

High-Output Electric Propulsion for Demanding Applications

At the heart of the HS-S4 is a high-output sealed electric propulsion unit engineered specifically for extended underwater operation. The motor delivers strong, continuous torque across the full speed range, providing rapid acceleration, high cruising speed and excellent low-speed precision. Fully electric propulsion provides critical advantages:

• Zero exhaust emissions
• No fuel odours or water contamination
• Virtually silent operation
• Minimal vibration transferred to the diver

This quiet performance preserves situational awareness, improves communication between divers and allows close observation of marine life without disturbance.

Multi-Stage Electronic Speed Control for Mission Flexibility

The HS-S4 is equipped with an advanced multi-stage electronic throttle system that provides precise control across a wide performance envelope:

• Low-speed modes: Delicate positioning for inspection, photography and buoyancy training.
• Mid-range settings: Support relaxed long-distance cruising.
• High-power modes: Rapid transits across open water or strong assisted returns against current.

Progressive acceleration and deceleration eliminate sudden surges that could destabilise buoyancy or disrupt trim. The ergonomic trigger layout allows confident one-handed control even when wearing thick gloves.

Pressure-Rated Professional Construction for Reliability

The HS-S4 is built around a reinforced pressure-rated sealed housing designed to protect electronics and battery systems at advanced recreational and light technical diving depths. Precision O-ring sealing, reinforced structural ribs and corrosion-resistant materials ensure dependable operation in both saltwater and freshwater environments.

The casing resists deformation under pressure and provides excellent impact protection during rocky entries and frequent handling in fleet environments. All external fittings are marine-grade and corrosion-proof, ensuring long service life under repeated immersion and heavy utilisation.

Extended-Range Lithium Battery System

Power for the HS-S4 is supplied by a high-capacity sealed lithium battery system designed for long-duration underwater propulsion duty cycles. The battery enclosure is fully isolated from water ingress and protected by multi-layer electronic management and safety systems.

The HS-S4 delivers extended runtime suitable for:

• Long reef and wreck exploration dives
• Multi-session training programs
• Extended inspection and infrastructure surveys
• Guided tour and resort operations

Intelligent power management maintains consistent thrust output throughout the discharge cycle, while fast recharge procedures allow rapid turnaround for commercial operators.

Ergonomic Control and Diver Comfort

The HS-S4 has been designed with extended-use ergonomics as a priority. The contoured dual-grip handle system provides a secure, fatigue-free hold and promotes natural wrist alignment. Trigger placement enables fine speed modulation with minimal finger movement. The near-neutral buoyancy profile and carefully tuned trim balance keep the unit in a stable horizontal attitude, reducing shoulder and forearm fatigue over long missions.

Integrated Safety and Protection Systems

Safety is engineered into every aspect of the HS-S4 platform. The fully enclosed propulsion duct eliminates exposed propellers, protecting divers and preventing entanglement with debris. Continuous electronic monitoring supervises motor temperature, controller load, and battery discharge rates. If abnormal conditions occur, the system automatically limits output or initiates protective shutdown. High-visibility exterior detailing improves underwater recognition.

Applications Across Advanced Recreational and Professional Diving

• Advanced exploration diving: Cover larger reef systems and wreck complexes with reduced fatigue.
• Instructor and technical training: Ideal platform for navigation and long-range dive training.
• Resort and guided tours: Premium scooter for long-distance specialty excursions.
• Inspection and survey work: Stable propulsion for marina surveys and infrastructure assessments.
• Search and support operations: Efficient sweep assistance for structured diver operations.

Transport, Deployment and Low-Maintenance Ownership

Despite its advanced performance, the HS-S4 remains portable and fits easily into standard dive transport cases. Quick-access charging ports and sealed compartments simplify turnaround. Routine maintenance is limited to rinse-down, seal inspection and battery charging, making it highly attractive for fleet operators managing multiple units.

Technical Overview – HS-S4

• Model: HS-S4 Underwater Scooter
• Propulsion: High-output electric enclosed ducted propulsor
• Control: Multi-stage electronic trigger throttle
• Housing: Reinforced pressure-rated sealed composite construction
• Buoyancy: Near-neutral, precision-balanced design
• Battery system: High-capacity sealed marine-grade lithium pack
• Depth rating: Advanced recreational / professional class
• Charging: Shore-power compatible fast-charge system

A Long-Range Professional Standard in Underwater Mobility

The HS-S4 Underwater Scooter represents the next level of performance in electric diver propulsion. By combining higher thrust, extended endurance, refined hydrodynamics and professional-grade construction, it delivers a platform capable of supporting the most demanding recreational and professional underwater operations. The HS-S4 is a long-range professional underwater mobility platform designed to expand what divers can safely and confidently achieve beneath the surface.