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Aquafarer Defender 500 (DF500) Commercial / Heavy-Duty Workhorse
Core commercial utility RIB stepping into the 5-meter class within the Defender series, upgraded with a 24° deep V deadrise and an integrated bilge fuel tank.
RIB Boats DF540
Aquafarer Defender 540 (DF540) Heavy-Duty Offshore Workhorse
Mid-size Workhorse, the flagship model in the Defender Commercial/Special Operations Series, designed for all-around utility operations and offshore patrol.
rib defender inshore mid-range commercial patrol sar
Overall Length 5.41 m / 17' 9'
Internal Length 4.21 m / 13' 10'
Beam 2.28 m / 7' 6'
Internal Beam 1.25 m / 4' 1'
Deadrise 24° (Offshore Commercial Deep-V Hull)
Tube Diameter 52 cm / 20'
Full Specifications ▼
Air Chambers 6
Fuel Tank 105 L / 28 Gal
Max Load 1,150 kg / 2,535 lb
Max Persons 12 persons
Boat Weight 500 kg / 1,102 lb
Max Engine Weight 210 kg / 463 lb
Max Power 115 HP
Recommended Power 90 HP
Engine Shaft L (Long Shaft 20')
Design Category CE Category C (Inshore Special Duty)
TLDR
A 5.41m commercial RIB with 4mm aluminum 24° offshore deep V hull, 105L fuel tank, rated for 115 HP.
- Coast guard, SAR teams, dive operators, and commercial marine operators.
- Use cases: Coast guard patrol, Search and rescue, Commercial dive operations
Aquafarer Defender 540 (DF540) Heavy-Duty Offshore Workhorse
Mid-size Workhorse, the flagship model in the Defender Commercial/Special Operations Series, designed for all-around utility operations and offshore patrol.
DF540 is specifically designed for coast guard patrol, Search and Rescue (SAR), commercial diving operations, commercial charter, and extreme water conditions.
Key Features
- Heavy-Duty Wear-Resistant Protection Pack: Comes standard with a full-length keel guard and reinforced heavy-duty rubbing strake.
Available Colors & Materials
- Fabric: Standard premium French ORCA® Hypalon or reinforced Valmex® PVC material.
- Dark Grey, Black, and High-Visibility Rescue Colors.
Standard Features
- Defender exclusive commercial console (includes windshield, stainless steel handrails, and switch panel)
- Single / Double Jockey Seats
- Suspension seat with shock absorber
Boat weight includes standard commercial console and seating; excludes outboard engine dry weight and fuel.
Why this exists
Professional marine units need a rugged 5.4m workhorse for coast guard patrol, SAR, and commercial diving.
Product Definition
Who is it for?
A 5.41m commercial RIB with 4mm aluminum 24° offshore deep V hull, 105L fuel tank, rated for 115 HP.
Designed for
Coast guard, SAR teams, dive operators, and commercial marine operators.
Best For Your Business
Clubs
Mid-size offshore workhorse for patrol, SAR, and commercial operations.
Use Case
Patrol, SAR, commercial operations, dive support
Operating Cost
Low-moderate — commercial-duty components for daily operation, minimal cosmetic maintenance
Expected Lifespan
10-20 years in commercial service
Why Businesses Choose It
The Defender 540 (DF540) is built for professional duty cycles — heavy-duty protection, commercial paint, and reinforced structure withstand daily commercial use.
Use Cases
Coast guard patrol
Search and rescue
Commercial dive operations
Maritime security
Skill level
professional
Comparison
How it compares
The DF540 is the flagship 5m Defender — larger fuel tank, more power, and heavier-duty construction than the DF500.
Frequently Asked Questions
What is the difference between DF540 and DF540 Coaster? ▼
The Coaster has a dedicated commercial console with windshield; the standard DF540 uses the Defender exclusive commercial console. Same hull and specs.
Can a dive rack be fitted? ▼
Yes, a dive rack system is available as optional equipment.
Technical Data
Full Specifications
| Overall Length | 5.41 m / 17' 9' |
| Internal Length | 4.21 m / 13' 10' |
| Beam | 2.28 m / 7' 6' |
| Internal Beam | 1.25 m / 4' 1' |
| Deadrise | 24° (Offshore Commercial Deep-V Hull) |
| Tube Diameter | 52 cm / 20' |
| Air Chambers | 6 |
| Fuel Tank | 105 L / 28 Gal |
| Max Load | 1,150 kg / 2,535 lb |
| Max Persons | 12 persons |
| Boat Weight | 500 kg / 1,102 lb |
| Max Engine Weight | 210 kg / 463 lb |
| Max Power | 115 HP |
| Recommended Power | 90 HP |
| Engine Shaft | L (Long Shaft 20') |
| Design Category | CE Category C (Inshore Special Duty) |
Construction
Materials & Construction
hull
4mm aluminum 24° offshore deep V
tubes
ORCA Hypalon / Valmex PVC 52cm
max engine
115 HP
capacity
12 persons
fuel
105 L under-floor
Compliance
Certifications & Compliance
✓
Certifications
CE (2013/53/EU (RCD)) Certified by TÜV Rheinland
ISO 9001:2015 Certified by SGS
BSCI Certified by Intertek
UKCA Certified by Intertek
✓
Material Compliance
REACH (EU)
RoHS (EU)
California Prop 65
✓
Testing & Warranty
ISO 6185 (RIB Safety)
ASTM D751 (Seam Strength)
ISO 12217 (Stability)
Warranty
5 years against manufacturing defects
✔
CE Certified
Independently tested to EU safety standards — TÜV Rheinland.
⚙
ISO 9001:2015
Quality management system certified by SGS since 2022.
✦
Tested to Standard
Every unit pressure tested at 1.25x rated PSI for 24-48 hours.
☆
5-Year Boat Warranty
5-year limited warranty on tube fabric, seams, and hull; 2-year on SUP and accessories. 99.3% defect-free (AQL 2.5/ISO 2859).
⚖
REACH & RoHS
All materials comply with EU chemical and environmental regulations.
★
BSCI Certified
Social compliance audit verified for ethical manufacturing.
Compare with other RIB Boats
View details
Aquafarer Defender 540 Coaster-style Console (DF540 Coaster-style Console)
The primary focus in the Defender Commercial/Special Utility series, featuring 'Inshore/Offshore Multi-purpose Operations & Exploration Patrol (Coaster Edition)'.
View details
Aquafarer Defender 600 (DF600) Heavy-Duty Offshore Workhorse
Entering the 6-meter class in the Defender Commercial/Special Operations Series, upgraded with CE Category B offshore certification, serving as the main offshore patrol vessel (Offshore Defender).
Interested in Aquafarer Defender 540 (DF540) Heavy-Duty Offshore Workhorse?
Contact our team for detailed specifications, pricing, and ordering information.