18′ Inflatable Boats SD518



The Saturn SD518 is the largest inflatable boat in the SATURN line, measuring 18 feet. It’s designed for commercial work, fishing, diving, or cruising with friends, showcasing versatility and durability.

The SD518 is noted for its heavy-duty construction, using German Heytex PVC, heat-welded seams, and a fiberglass-covered transom. It’s capable of carrying up to 10 persons and handles a maximum motor power of 50 HP.

Brand Background

BoatsToGo is renowned for its commitment to providing high-quality, durable, and versatile inflatable boats, with the Saturn series exemplifying this commitment through robust construction and practical design.

The brand has consistently been recognized for introducing sturdy, reliable, and innovative inflatable boats that cater to a wide range of activities, both recreational and commercial.

Specifications and Features

The SD518 has a loading capacity of 2500 lbs, supports up to a 50 HP motor, and is constructed from 1100 Denier Reinforced PVC. It includes a heavy-duty aluminum floor and can achieve speeds of approximately 30 mph with a 40HP motor and 2 adults.

Features include separate internal air chambers, a one-way drain valve with plug, a durable rubber strike, a safety valve to prevent over-inflation, stainless steel D-rings for towing, and reliable flat air valves with pushpin design.

The SD518 sets itself apart with its size, capacity, and safety features, making it an outstanding choice for commercial use, fishing, or group recreational activities.

Design and Construction

The SD518 is designed for maximum durability and performance, featuring double layers of fabric at the bottom of the tubes and a rub-strake protector along the keel for extra protection.

 Constructed with 1100 Denier Reinforced PVC and heat-welded seams, the SD518 is built to withstand tough conditions and heavy use.

 When deflated and folded, the SD518 can be stored in the back of an SUV, minivan, or a garage. A folding hand cart is recommended for moving the deflated boat, and dinghy wheels are available for moving the inflated boat.

Performance and Handling

 The SD518 offers excellent stability, maneuverability, and speed, making it suitable for calm lakes, rivers, and ocean use.

 Its design and construction ensure reliable performance in various water conditions, catering to different activities.

 With a capacity for up to 10 persons, the SD518 offers ample space and stability for passengers and equipment.

Setup and Maintenance

Inflation and assembly are estimated to take about 45 minutes, ensuring a quick and convenient setup.

 The high-quality materials and construction minimize maintenance needs while ensuring long-term durability.

Replacement parts and accessories are readily available, ensuring easy maintenance and service.

Accessories and Customization

The SD518 comes with a repair kit, 3 seat benches, carry bags, and a complimentary high-volume hand pump.

Additional accessories such as dinghy wheels and other optional equipment are available to enhance the boating experience.

 The boat’s design allows for compatibility with a wide range of accessories, enhancing its utility and adaptability.

User Experience and Reviews

Customers appreciate the SD518’s spaciousness, heavy-duty construction, and handling. It’s described as the largest inflatable boat they’ve owned, with impressive spaciousness and performance. Issues with the manufacturer’s statement of origin not being completely filled out have been noted.

Praises include the boat’s solid construction, spacious interior, and handling. Concerns include the weight and size of the boat, making it a substantial effort to deflate, roll up, and transport. However, customers are very satisfied with its performance and spaciousness.

 Users have shared their positive experiences, noting the SD518’s durability, thoughtful design features, and the inclusion of essential equipment, which demonstrates the brand’s commitment to customer satisfaction.

Price and Value

 The pricing information was not provided on the website. However, considering the size, features, and construction quality of the SD518, it’s positioned as a valuable investment for those needing a large, robust inflatable boat.

Given its extensive features, large capacity, and heavy-duty construction, the SD518 is likely to offer excellent value for money.

 The brand’s reputation for quality suggests good resale value and reliable warranty coverage.

Pros and Cons

  • large size
  • heavy-duty construction
  • high load capacity
  • the significant weight and effort required for transportation and storage. need for ample storage space due to its larger size.

Conclusion and Recommendation

The Saturn SD518 Inflatable Boat is highly recommended for its exceptional size, durability, and versatility, suitable for commercial work, fishing, diving, and group recreational activities.

Ideal for commercial operators, large groups, and anyone requiring a spacious, robust boat for various water-based activities.

For different requirements or budgets, exploring other models in the brand’s range or similar brands might provide suitable alternatives.


How does the SD518 accommodate commercial work and diving operations?

The SD518’s large size, heavy-duty construction, and high load capacity make it suitable for commercial work, diving, and other intensive operations, providing ample space and stability for equipment and personnel.

Is the SD518 suitable for leisure activities and large group outings?

Yes, the SD518’s spacious design and high load capacity provide ample space and comfort for leisure activities, group outings, and family trips on the water.

What makes the SD518 stand out in terms of durability and performance?

The SD518 is made from 1100 Denier Reinforced PVC with heat-welded seams and features like a deep inflatable V-keel with a rub-strake protector, ensuring durability, performance, and stability in various water conditions.

Can the SD518 be easily transported and stored when not in use?

The SD518 can be deflated and folded into two large bags, one for the tubes and another for the floor. Although it’s quite large and heavy, a folding hand cart is recommended for moving the deflated boat, and dinghy wheels are available for moving the inflated boat.

What are the key safety features of the SD518?

The SD518 includes safety features such as multiple air chambers, a one-way drain valve with plug, all-around durable rubber strike, safety valve to prevent over-inflation, and extra-wide heavy-duty rub strakes for added protection.

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