Rocna Vulcan Galvanised Anchor 20kg 44lb High Holding Power 77-106-075 Boat
Rocna Vulcan Galvanised Anchor 20kg 44lb High Holding Power 77-106-075 Boat
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Vulcan Galvanised Anchor 20 kg - 77-106-075
Rocna Engineering - High Holding Power Without the Roll-Bar
The Vulcan anchor is a major design evolution from Rocna, specifically engineered to provide exceptional holding power for vessels that cannot accommodate a traditional roll-bar anchor. Ideal for powerboats with bow pulpits and sailboats with bowsprits, the Vulcan features a unique combination of shank and fluke geometry that ensures a quick, deep set in nearly all seabed conditions, including mud, sand, and kelp.
Key Features
- ✔ Roll-Palm™ Design: Self-rights without a roll-bar
- ✔ I+V Profile™ Shank: Computer-optimized for strength
- ✔ V-Bulb™ Ballast: Maximum leverage for fast penetration
- ✔ Self-Launching: Smooth action on bow rollers
- ✔ High-Tensile Steel: Hot-dip galvanised finish
Technical Specs
| Weight: | 20 kg (44 lb) |
| Fluke Area: | 1240 cm² |
| Material: | Hot-Dip Galvanised Steel |
| Shank Length (A): | ~864 mm |
| Width (S): | ~435 mm |
| Recommended Chain: | 8mm - 10mm (5/16" - 3/8") |
Vessel Sizing Guide
| Boat Length | Max Displacement | Usage Note |
|---|---|---|
| 10 m (33 ft) | Up to 14 Tonnes | Primary Anchor |
| 11 m (36 ft) | Up to 12 Tonnes | Heavy Duty |
| 12 m (40 ft) | Up to 10 Tonnes | Standard Use |
| 14 m (46 ft) | Up to 6 Tonnes | Light Displacement Only |
OEM Cross Reference
| Manufacturer Part Number (MPN) | VLC20GS |
| Internal SKU | 77-106-075 |
| Alternative Reference | RV020 |
Questions & Answers
Is this a genuine original part?
Yes, this is an authentic Rocna Vulcan anchor, manufactured by CMP Group to the highest marine standards.
How do I know if it is compatible?
We recommend checking the SKU/MPN (77-106-075 / VLC20GS). This model is specifically designed for vessels between 10m and 14m that have bow platforms or pulpits where a roll-bar may interfere.
Can it be used for tandem anchoring?
Yes, the Vulcan 20kg features a dedicated tandem anchoring attachment point at the rear of the fluke, as well as a separate attachment point for a buoyed retrieval line.
Note: Sizing recommendations are based on 50 knots of wind and associated surge. For multi-hulls, we suggest selecting one size larger than the standard recommendation. Visit 4boats.co.uk for more information.

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