Product Features
- COMPLETE BACKPLATE & WING SYSTEM | Supplied assembled with the original SEAC black aluminum backplate, counterplate, and mounting hardware. Enjoy the structural support and stability of a rigid backplate without having to purchase these components separately.
- TWIN-TANK COMPATIBLE | Specifically designed to accommodate double-cylinder configurations, the Modular Max features an 18.4 kg (40.5 lb) lift capacity, making it suitable for experienced divers carrying additional equipment. Appropriate twin-cylinder mounting hardware is required.
- LIGHTWEIGHT ALUMINUM BACKPLATE | The included original SEAC aluminum backplate provides a rigid, durable mounting platform while keeping the system lighter than comparable stainless-steel backplate configurations.
- 100% MODULAR DESIGN | Every major component is interchangeable, allowing divers to customize their equipment with compatible bladders, harnesses, and backplates to suit different diving requirements.
- DURABLE DONUT WING BLADDER | Constructed from high-resistance 1680D Ballistic Nylon with an internal polyurethane air chamber. The 18.3-litre donut bladder provides balanced buoyancy distribution, improved horizontal trim, and reduced underwater drag.
- PRECISE BUOYANCY CONTROL | Features a reliable piston inflator and two quick-release dump valves, allowing efficient air management and precise buoyancy adjustments throughout the dive.
- FULLY ADJUSTABLE HARNESS | The one-size-fits-all harness offers adjustable shoulder and waist straps for a secure, personalized fit. Its streamlined configuration allows excellent freedom of movement.
- READY FOR ACCESSORIES | Equipped with 6 stainless-steel D-rings for attaching diving accessories, instruments, and additional equipment, plus 2 included trim-weight pockets to optimize weight distribution.
What’s Included?
This Nautilus assembled package contains four original SEAC components:
- SEAC Modular Max Wing BCD (42-39N) – High-capacity donut wing with adjustable harness, inflator, dump valves, and trim-weight pockets.
- SEAC Black Aluminum Backplate (0450009) – Rigid aluminum backplate providing structural support and a stable equipment-mounting platform.
- SEAC Counterplate (0480476) – Original mounting support for the SEAC Modular backplate system.
- SEAC Mounting Screw Kit (0480477) – Original mounting hardware for assembling the compatible components.
All four components are supplied assembled as one integrated BCD system.
Technical Specifications
| Brand | SEAC |
| Model | Modular Max |
| BCD Style | Backplate & Wing |
| Configuration | Single Tank / Twin-Tank Compatible |
| Lift Capacity | 18.4 kg (40.5 lb) |
| Bladder Volume | 18.3 Litres |
| Bladder Material | 1680D Ballistic Nylon |
| Internal Bladder | Polyurethane |
| Backplate | Black Aluminum – Included |
| Harness | Fully Adjustable |
| D-Rings | 6 Stainless Steel |
| Trim Pockets | 2 Included |
| Inflator | Piston Inflator |
| Dump Valves | 2 |
| Size | One Size |
| Colour | Black |
| BCD Weight | 3.6 kg (before additional backplate components) |
| Certification | EN 1809:2014 + A1:2016 |
Why Choose the SEAC Modular Max?
Designed for divers looking to advance beyond traditional jacket-style BCDs, the SEAC Modular Max combines the stability and streamlined profile of a technical-style wing with the versatility of a fully modular system.
With the additional aluminum backplate already installed, this Nautilus package offers a practical solution for divers seeking a customizable backplate-and-wing configuration.
Whether diving with a single cylinder or preparing for twin-tank diving, the Modular Max provides the flexibility to adapt your equipment as your diving experience develops.
Note: Cylinders, regulators, and dedicated twin-cylinder mounting hardware are not included. Suitable cylinder attachment components must be selected for the intended configuration.
