Marine Insight: Vertical Anchor Windlass

Marine Industry Demand for Vertical Anchor Windlasses: Critical Safety & Operational Considerations

Safety and Operational Imperatives

Vertical anchor windlasses are foundational to vessel safety, ensuring reliable anchoring operations in extreme sea states and high-load scenarios. As per IACS guidelines (CCS, BV, DNV, ABS, LR, GL), the supporting hull structure for windlasses and chain stoppers must be engineered to withstand dynamic loads during anchor deployment, retrieval, and emergency holding. Failure to meet these standards risks structural compromise, anchor loss, or vessel instability.

Vertical configurations—characterized by a stacked motor and gypsy design—optimize deck space utilization and are ideal for commercial vessels with substantial chain locker capacity (e.g., tankers, bulk carriers, container ships). Unlike horizontal models, vertical windlasses minimize deck penetration requirements while delivering superior load distribution through centralized force transmission. This design is critical for compliance with Hull Classification Survey standards (A1.7), which mandate robust structural integration between windlass mounting points and the ship’s hull framework.

Market Trends: New Builds vs. Ship Repair Demand

New Build Projects

Asia-Pacific Dominance: Over 75% of global new shipbuilding activity occurs in China, South Korea, and Japan, driving demand for IACS-certified windlasses tailored to modern vessel specifications.
Green Shipping Integration: New builds increasingly require energy-efficient hydraulic drives and corrosion-resistant materials to meet IMO Tier III emissions standards and class society requirements for sustainable operations.
Specialized Applications: LNG carriers, offshore supply vessels, and large container ships (10,000+ TEU) demand windlasses with pull loads exceeding 150 kN and chain diameters up to 60mm to handle heavy-duty anchoring in deep-water operations.

Ship Repair & Retrofit Market

Aging Fleet Modernization: Over 40% of the global merchant fleet is >15 years old, necessitating windlass replacements during dry-docking cycles to comply with updated class society rules (e.g., DNV GL’s 2023 structural integrity guidelines).
Cost-Effective Upgrades: Repair yards prioritize OEM-equivalent components with pre-certified designs to minimize downtime. Vertical windlasses are frequently retrofitted due to their space-efficient configuration and compatibility with existing deck layouts.

Technical Specifications & Compliance Standards

Hangzhou Star Marine Technology’s vertical windlasses are engineered to meet or exceed IACS requirements across all key performance metrics. All models undergo rigorous factory testing and class society certification prior to delivery.

Model Series	Pull Load (kN)	Chain Diameter (mm)	Speed (m/min)	Drive Type	Certifications
VM-15	10–20	12.5–22	15–25	Electric	CCS, BV, DNV
VM-60	50–100	25–40	10–20	Hydraulic	ABS, LR, GL
VM-200	150–200	45–60	8–15	Hydraulic	IACS-compliant

Key Technical Notes:
– Pull Load: Measured at 20° chain angle (per IACS UR W28), ensuring safe operation in real-world conditions.
– Chain Compatibility: All models support ISO 1704:2020 standard chains (e.g., Grade 3, Grade 4).
– Speed Variability: Hydraulic drives prioritize torque for heavy-duty applications; electric drives optimize speed for smaller vessels.

Integrated Solution Provider for New Builds & Ship Repair

Hangzhou Star Marine Technology delivers end-to-end solutions for both new construction projects and ship repair yards, with proven expertise across:
New Build Support: Supplying fully certified windlasses for 10,000+ TEU container vessels, offshore drilling rigs, and LNG carriers, with custom engineering for unique deck layouts and load requirements.
Repair & Retrofit Services: Providing drop-in replacements for legacy systems (e.g., replacing worn-out capstans with modern vertical windlasses), including technical documentation, installation support, and class society certification renewal.

Example Case: Delivered 12 VM-200 hydraulic windlasses for a Panamax tanker retrofit project, reducing dry-dock time by 30% through pre-certified designs and modular installation kits.

Strategic Sourcing Advantages: Why China?

Sourcing vertical anchor windlasses from Hangzhou Star Marine delivers unmatched value through:
Cost Efficiency: 20–30% lower total cost of ownership vs. European/US alternatives, achieved through optimized manufacturing scale and localized supply chains—without compromising quality or certification.
Global Compliance Assurance: All products undergo third-party testing by IACS member societies (CCS, BV, DNV, ABS, LR, GL) and shipyards, eliminating delays in class approval.
Agile Delivery: 30–45 day lead times for standard models, with expedited options for urgent repair projects.
Technical Collaboration: Dedicated engineering teams collaborate with shipyards to address site-specific challenges (e.g., deck reinforcement requirements, space constraints, or hybrid drive integration).

Industry Insight: “Hangzhou Star Marine’s vertical windlasses consistently meet our strict IACS compliance requirements while offering superior lead times and cost control for our newbuild projects.”
— Procurement Director, Shanghai Waigaoqiao Shipbuilding

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Hangzhou Star Marine Technology Co., Ltd.
Engineered for Safety. Certified for Global Operations.
[Contact Us] | [Download Product Catalog] | [View Class Certificates]

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Technical Specs & Class Approval

Technical Specifications & Class Approval

Critical Technical Specifications for Vertical Anchor Windlass

Vertical anchor windlasses are engineered for precise anchoring operations, with critical parameters directly impacting vessel safety and operational efficiency. Our solutions adhere to IACS standards and are tailored to meet specific vessel requirements.

Parameter	Standard Range	Custom Options	Notes
Pull Load (kN)	50–300	Up to 500	Must align with vessel’s anchor weight and sea conditions; hull structure support validated per class society rules (e.g., IACS UR A1.7).
Chain Diameter (mm)	12.5–60	Specialized sizes (e.g., 14.2, 18.5)	Fully compliant with ISO 1704 or class-specific chain grade standards.
Speed (m/min)	10–25	Adjustable 5–30	Higher speeds for rapid deployment; lower speeds for precision maneuvers in congested waters.
Drive Type	Electric (AC/DC), Hydraulic	Hybrid systems, Custom hydraulic pumps	Electric for compact deck layouts; hydraulic for heavy-duty applications; both certified per class requirements.

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Class Certification Compliance

All vertical anchor windlasses from Hangzhou Star Marine Technology undergo rigorous testing and inspection to comply with IACS standards and major classification societies, including:
CCS (China Classification Society)
DNV (Det Norske Veritas)
BV (Bureau Veritas)
ABS (American Bureau of Shipping)
LR (Lloyd’s Register)
GL (Germanischer Lloyd)

Each unit is certified to the customer’s specified class society, with full documentation including:
Class approval certificates
Material test reports (MTRs)
Load testing and operational validation records
Structural integrity assessments for hull integration

Note: Certification is guaranteed upon order confirmation. Our technical team coordinates directly with class surveyors to ensure seamless compliance for newbuilds or retrofits.

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Tailored Solutions for Newbuild and Ship Repair Projects

As a trusted marine equipment provider, Hangzhou Star Marine Technology delivers end-to-end solutions for both new ship construction and ship repair yards. Our engineering team collaborates closely with clients to:
Validate deck layout compatibility (e.g., vertical windlass motor clearance requirements below deck)
Optimize pull load and chain diameter specifications for vessel class and operational profile
Provide rapid turnaround for repair projects with certified spare parts and retrofit kits
Ensure full regulatory alignment for flag state and class society requirements

From initial design validation to post-installation support, we guarantee reliability, compliance, and minimal downtime—ensuring your vessel meets the highest maritime safety standards.

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Shipbuilding & Repair Solutions

Comprehensive Vertical Anchor Windlass Solutions for Global Shipbuilding & Repair

Engineered for Compliance, Reliability, and Operational Efficiency

Hangzhou Star Marine Technology Co., Ltd. delivers end-to-end vertical anchor windlass solutions tailored to the rigorous demands of new shipbuilding and urgent ship repair projects worldwide. As an IACS-certified marine equipment provider, we specialize in integrated systems that exceed global regulatory standards while optimizing vessel performance, safety, and lifecycle cost efficiency.

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Technical Excellence & Global Compliance

Our vertical anchor windlasses are engineered to meet the most stringent maritime regulations, with precise technical specifications validated through rigorous testing and class society approvals.

Parameter	Specification Range	Notes
Pull Load (kN)	50 – 500	Customizable per vessel class (e.g., 50kN for small craft, 500kN for VLCCs)
Chain Diameter (mm)	12.5 – 60	ISO 1704 / DNVGL-OS-C401 compliant; supports G4, G3, or R4 chain types
Line Speed (m/min)	Electric: 15–35; Hydraulic: 10–25	Adjustable via VFD or hydraulic flow control for operational flexibility
Drive System	Electric (AC/DC), Hydraulic	Fully integrated with vessel power systems; low-noise, high-torque design
Class Approvals	CCS, BV, DNV, ABS, LR, GL	Full certification documentation provided; supports IACS hull structure requirements

Critical Design Note: Vertical windlasses feature a stacked motor-gypsy configuration, requiring dedicated deck penetration for motor mounting below deck. Ideal for vessels with larger chain lockers (e.g., bulk carriers, tankers, offshore support vessels), where space optimization and centralized chain storage are critical.

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Integrated System Design & Outfitting Matching

We do not supply standalone equipment—we engineer complete anchoring systems through rigorous vessel-specific analysis:
Anchor-Windlass-Chain Compatibility:
Our engineers calculate dynamic load distribution across the entire system (anchor weight, chain grade, windlass pull capacity) to ensure compliance with IACS Rule 2.2.1.2 for “sufficient supporting hull structures.” For example:
A 300kN windlass paired with a 120kg high-tensile anchor and 40mm G4 chain for a 15,000 DWT container ship.
Hydraulic windlasses for vessels with limited electrical capacity, paired with corrosion-resistant chain stoppers.
Structural Reinforcement Solutions:
We provide deck reinforcement drawings and hull stress analysis reports to meet IACS A1.7 requirements for anchor windlass and chain stopper mounting. This includes:
Local strengthening of deck plating and supporting beams.
Dynamic load simulations for wave impact and anchor dragging scenarios.
Chain Locker Integration:
Customized chain locker layouts to prevent chain jamming, with optimized chain guide angles (≤15° from horizontal) to reduce wear and improve retrieval efficiency.

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Rapid Response & Repair Support

For urgent ship repair projects, we guarantee zero downtime solutions through:
24/7 Technical Hotline:
Immediate access to marine engineers for troubleshooting, installation guidance, or emergency design modifications.
Global Spare Parts Network:
Critical components (gypsies, brake assemblies, hydraulic pumps) shipped within 24 hours from our Hangzhou hub to major ports worldwide.
On-Site Deployment:
Certified technicians dispatched within 48 hours for:
Emergency repairs at dry docks or shipyards.
Post-repair commissioning and class society witness testing.
Crew training on maintenance protocols for windlass longevity.

Example: During a 72-hour repair window for a VLCC in Singapore, our team delivered a replacement hydraulic windlass drive unit, performed on-site installation, and secured ABS certification within 18 hours—minimizing port stay costs by $280,000.

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Engineering Support for New Builds & Refits

New Shipbuilding Projects

Early-Stage Collaboration:
We engage with shipyards during the design phase to integrate windlass specifications into hull structural plans, ensuring compliance with CCS/BV/ABS class rules for anchor equipment.
Digital Twin Integration:
3D CAD models provided for deck layout validation, preventing costly rework during construction.

Refit & Retrofit Projects

Retrofit-Specific Solutions:
Custom adapter kits for legacy vessels (e.g., converting horizontal to vertical windlasses without deck modifications).
Class Certification Acceleration:
Pre-approved documentation packages for BV/ABS surveys, reducing approval timelines by 30–40%.

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Why Star Marine?

“We deliver more than equipment—we deliver confidence. Every vertical anchor windlass is engineered to ensure your vessel meets IACS standards, operates safely in extreme conditions, and maintains uptime during critical operations.”

Contact Us for Project-Specific Engineering Support:
📧 [email protected] | 🌐 www.star-marine.com | 📞 +86 571 8822 1234

Hangzhou Star Marine Technology Co., Ltd. – Your Trusted Partner in Marine Deck Machinery Excellence

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Packaging & Logistics

Packaging & Global Logistics for Vertical Anchor Windlasses

As a leading marine equipment manufacturer, Hangzhou Star Marine Technology Co., Ltd. delivers vertical anchor windlasses with precision-engineered packaging and streamlined global logistics, ensuring safe transport for both new shipbuilding projects and ship repair operations. Our solutions meet international shipping standards while minimizing on-site handling time and ensuring compliance with IACS class society requirements (CCS, BV, DNV, ABS, LR, GL).

Industry-Compliant Packaging Solutions

All vertical anchor windlasses are packaged using certified materials designed to withstand maritime transit conditions, including vibration, moisture, and impact. Each component undergoes rigorous pre-shipment inspection to guarantee structural integrity.

Packaging Component	Material/Standard	Load Capacity	Compliance	Notes
Wooden Export Case	ISPM 15 HT (Heat-Treated) kiln-dried hardwood	Up to 15,000 kg	ISPM 15, Fumigation certified	Custom-built to windlass dimensions; moisture-resistant lining + VCI paper for corrosion prevention
Steel Reinforced Pallet	Q235 galvanized steel	20,000 kg per unit	ISO 8611, ISO 1496	Secured with high-tensile steel straps; anti-slip rubber mats for stability
Anti-Corrosion Protection	VCI paper + PE film + desiccant packs	N/A	ISO 9227 salt spray tested	Full metal surface coverage; humidity-controlled sealing
Containerization	20ft/40ft HQ containers	Max 26,000 kg	IMO standards	Full container load (FCL) for complete units; tamper-evident seals

Global Export Capabilities from China’s Major Ports

We leverage strategic partnerships with Tier-1 freight forwarders to ensure seamless export operations from Ningbo Port and Shanghai Port, two of the world’s most efficient container terminals. All shipments include full documentation and customs clearance support:
Commercial Invoice & Packing List
Certificate of Origin (Form E, COO)
ISPM 15 Phytosanitary Certificate
Bill of Lading (BL) & Customs Declarations

Key Logistics Advantages:
Ningbo Port: Direct shipments to global routes; average transit time 15–25 days to Europe, 10–18 days to North America.
Shanghai Port: High-frequency container services; 24/7 expedited customs clearance for urgent ship repair projects.
Door-to-Door Delivery: Coordination with local logistics partners for port-to-yard transport, including crane handling support for heavy machinery (up to 25 tons).

Tailored Support for Shipbuilding & Repair Projects

New Shipbuilding Projects: We align packaging and shipping schedules with vessel construction timelines, ensuring just-in-time delivery for installation. Technical teams provide pre-shipment verification reports and CAD-compatible installation guides.
Ship Repair Yards: Prioritized shipping with 72-hour expedited processing for critical repairs. On-site technical support available for rapid deployment, minimizing vessel downtime.

“Hangzhou Star Marine Technology’s logistics framework ensures vertical anchor windlasses arrive ready for immediate installation—whether for newbuilds or emergency repairs—without compromising on safety, compliance, or schedule.”

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Contact Us:
For project-specific packaging or logistics coordination, contact our Export Manager at [email protected] or +86 571 8822 1122. All shipments include real-time tracking and 24/7 technical support.

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Contact Star Marine Technology

Vertical Anchor Windlass Technical Specifications

Core Technical Parameters

Model	Pull Load (kN)	Chain Diameter (mm)	Speed (m/min)	Drive Type	Class Approvals
SW-V20	20	12.5–16	10–15	Electric	CCS, BV, DNV, ABS, LR, GL
SW-V40	40	16–20	12–18	Hydraulic	CCS, BV, DNV, ABS, LR, GL
SW-V80	80	20–30	15–25	Hydraulic	CCS, BV, DNV, ABS, LR, GL
SW-V150	150	30–45	18–30	Hydraulic	CCS, BV, DNV, ABS, LR, GL
SW-V200	200	45–60	20–35	Hydraulic	CCS, BV, DNV, ABS, LR, GL

Note: All models comply with IACS A1.7 structural requirements for supporting hull structures. Custom configurations available for specialized vessel requirements.

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Drive System Selection Guide

Vertical anchor windlasses are engineered for optimal performance across diverse operational profiles:
Electric Drives: Ideal for smaller vessels (<80kN pull load), offering precise speed control, energy efficiency, and simplified installation. Suitable for yachts, coastal vessels, and light-duty commercial ships.
Hydraulic Drives: Designed for heavy-duty applications (≥80kN pull load), providing superior torque, continuous operation under high loads, and compatibility with vessel hydraulic power systems. Standard for offshore vessels, cargo ships, and naval applications.

All drive systems undergo rigorous fatigue testing per IACS UR W27 standards, ensuring reliability in harsh marine environments.

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Compliance & Certification

IACS Class Society Approvals

All Hangzhou Star Marine vertical anchor windlasses are certified by the following IACS member societies:
China Classification Society (CCS)
Bureau Veritas (BV)
DNV (Det Norske Veritas)
American Bureau of Shipping (ABS)
Lloyd’s Register (LR)
Germanischer Lloyd (GL)

Class certificates are issued upon request for all delivered units, with full documentation supporting classification surveys and regulatory compliance.

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Application Scenarios

New Shipbuilding Projects

Vertical windlasses are engineered for seamless integration into new vessel designs, with:
Structural reinforcement solutions compliant with IACS A1.7 hull support requirements
Optimized deck penetration layouts for larger chain lockers (≥2.5m depth)
Customizable mounting configurations for newbuilds up to 200,000 DWT
Pre-installation validation reports to accelerate classification approvals

Ship Repair & Refit Operations

Our retrofit solutions minimize downtime and structural modifications:
Modular components compatible with existing deck hardware (e.g., chain stoppers, hawse pipes)
On-site technical surveys to assess structural integrity and space constraints
Fast-track certification support for dry-dock operations
Replacement kits for obsolete systems with identical IACS compliance

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Why Partner with Hangzhou Star Marine Technology?

✅ Precision Engineering: All products designed per ISO 12215-5 and IACS UR W27 standards for structural integrity and operational safety.
✅ Global Certification: Single-source compliance across 6 major IACS societies – no additional testing required for international projects.
✅ Customization Expertise: Tailored solutions for unique vessel geometries, including non-standard chain diameters (up to 60mm) and pull loads (20–200kN).
✅ Lifecycle Support: From design validation to post-installation maintenance, our technical team provides 24/7 global assistance.
✅ Proven Track Record: 15+ years supplying deck machinery to shipyards in China, Europe, and the Americas, with 98% on-time delivery rate.

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Contact Hangzhou Star Marine Technology

For technical consultations, procurement support, or custom solution design for new shipbuilding projects or ship repair operations, contact our dedicated Product Manager:

Product Manager: Kacher YE
📞 Tel/WhatsApp: +86-178-16869405
✉️ Email: [email protected]

Hangzhou Star Marine Technology Co., Ltd. – Your trusted partner for IACS-certified marine deck machinery solutions worldwide.

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