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Key benefits
The ACV-1 Hippo sets a new standard for fully automatic twistlocks, combining safety, operational efficiency, and sustainability.
- Unmatched safety with wire-operated locking mechanically secures the unit to the container’s corner fitting, eliminating accidental drop-off risks.
- Full payload capacity enabled by a 12 mm vertical clearance, identical to semi-automatic twistlocks, ensures you carry full cargo volume without compromise.
- Forged for strength as the forged housing withstands extreme stress and heavy-sea conditions for long-term reliability.
- Zero maintenance means no greasing or adjustment required, reducing operational costs and downtime.
- Lower carbon footprint from forged manufacturing, cutting CO₂ emissions by more than 40% compared to casting, supporting your sustainability goals.
Together, these qualities make Hippo the safest and most sustainable securing solution on the market.
Key features
Purpose-built for simplicity and endurance, Hippo integrates seamlessly into modern container-securing systems.
- Automatic engagement and release during crane handling; no manual intervention.
- Wire-operated drop-lock for secure mechanical locking and fall-off prevention.
- Forged high-tensile steel housing for unmatched durability.
- 12 mm vertical clearance preserves stacking height and payload efficiency.
- Hot-dip galvanised finish for maximum corrosion resistance.
- Maintenance-free performance throughout service life.
- Comprehensive certification, approved by DNV, BV, KR, ABS and LR for global operations.
Download Container Cargo System Booklet 2025
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References
Hapag-Lloyd selected the MacGregor ACV-1 Hippo for its A19-class 19,900 TEU vessels, enabling the addition of an extra container tier without compromising safety or performance.
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Technical Features
- Operation: Automatic locking/unlocking with fall-off prevention
- Tension Break Load: ≥ 500 kN
- Shear Break Load: ≥ 420 kN
- Compression Break Load: ≥ 2 000 kN
- Vertical Clearance: 12 mm
- Flange Thickness: 15 mm / 28 mm
- Material: Forged high-tensile steel
- Surface Treatment: Hot-dip galvanised
- Handle: Stainless-steel “SteveKnob” design
- Counterparts: ISO corner fittings
- Certifications: DNV, BV, KR, ABS, LR type approvals
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Ship Types
Compatible with all container vessel classes, including
- Feeder and coastal vessels
- Panamax and post-Panamax ships
- Ultra-large container carriers (ULCVs)
Hippo integrates easily with newbuild or retrofit installations to improve operational safety and productivity. -
Checklist for successful purchasing
Vertical Clearance (12mm)
- Matches semi-automatic twistlocks with a 12mm vertical clearance. Everything over 12mm is away from payload and safety.
Secure Locking with No Drop-Off- Wire-operated, mechanically secured locking prevents drop-offs during loading and unloading.
- Designed for ease of use by stevedores accustomed to handle wire operation.
Exceptional Grip and Anti-Slip Performance- Features a wire-operated drop-lock that ensures a solid, forged twistlock body, enhancing safety and reliability.
Understand the Differences Between Fullyauto Twistlocks- Fully-automatic twistlocks vary in performance—know the key features and specifications to make an informed purchase.
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Retrofitting
Looking to upgrade your in-service vessel’s semiautomatic twistlocks to the advanced Hippo fully automatic twistlocks? MacGregor makes this process straightforward and efficient.
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The world’s toughest twistlock class notation “HHT” from the Korean Register
KR’s notation demands exceptional performance, including the smallest vertical clearance, maximized pull-out capacity and a tension breaking load of at least 750kN - something only top-tier twistlock like Hippo can deliver.
