This article introduces shipbroking business and the positioning of Yanyang Marine, analyzes the chaotic situation and risks in China’s dredger and engineering vessel market, explains the classification of narrow-sense shipbroking, and highlights the extended functions of brokers in China’s secondhand engineering vessel sector. It also summarizes the core value of Yanyang Marine as a professional one-stop solution provider for newbuilt and secondhand engineering vessels, helping international clients avoid trading risks and select reliable partners

This paper focuses on cutter suction dredger (CSD) dredging cost calculation methodology, covering CAPEX, OPEX and sundry costs with formulas, cases and optimization tips. It analyzes CSD pricing rules and factors from small modular to large deep‑water models, citing 2025 market data to clarify price ranges and accounting points. It provides practical solutions for budgeting, procurement and cost control, helping stakeholders accurately estimate total investment and unit dredging cost to avoid overruns.

This article clarifies key differences between coastal and offshore navigation areas under Chinese maritime regulations and CCS rules, with a focus on dredgers and offshore engineering vessels. It covers geographic scope, sea conditions, structural, safety, stability, freeboard and subdivision standards. It also corrects common misunderstandings and compares China’s zones with UNCLOS territorial sea and EEZ. Practical for design, operation, export, bidding and compliance, it helps prevent certificate issues, insurance problems and PSC detention for overseas-going vessels.

This document provides a clear selection framework for dredging pipelines. It highlights steel pipe as the optimal choice for high-pressure, long-distance, and complex offshore conditions due to its high strength, wear resistance, and pressure capacity. Alternative pipes (HDPE, FRP, rubber hose, etc.) are recommended for specific low-pressure, corrosive, or movable scenarios, with a quick decision table for engineering reference.

This article details the 2-year spare parts list for 5500m3 trailing suction hopper dredgers, structured around six core categories: vessel navigation, dredging operations, power propulsion, hydraulic control, piping and valves, and auxiliary engine systems, with clear quantity recommendations and matching requirements for vessel core parameters. Yanyang Marine provides customized configuration suggestions and full-life-cycle maintenance services to ensure rational use of spare parts for customers.

This paper compare two biggest backhoe dredgers with Liebherr P995 and Hitachi EX5500, outlines the core operational advantages of backhoe dredgers and provides professional project selection criteria based on the company’s practical operation experience. We offer a full range of high-quality dredging equipment such as EX3600 and EX1900, which can be customized to meet the dredging needs of inland waterways, coastal deep water and other different scenarios, providing reliable equipment support for various dredging projects.

This article analyzes the cost composition of a river dredging and desilting project by Yanyang Engineering. It systematically breaks down direct costs (mainly dredging operation expenses including machinery and labor, plus sludge transport and disposal fees) and indirect costs (pre-project survey, design and temporary facilities, management, environmental protection, and contingencies for bad weather and geological changes). It provides practical references for cost control and scheme optimization of river dredging projects.

Environmental and reclamation dredging serve ecological protection and land creation respectively. This article compares vessel selection between CSD, TSHD, grab dredgers and special pumps, highlights Yanyang Marine’s dredger range, outlines technical differences and project cases, and provides full dredging vessel solutions for various applications.

Cutter Suction Dredgers (CSDs) are key for for river, port and coastal dredging works, with a global market of $5.2B to hit $7.1B by 2030. This paper covers CSD pricing factors and ranges, introduces Yanyang Marine’s large CSD expertise and export leadership, and outlines green propulsion trends and global procurement tips.

This article conducts an in-depth analysis of the pricing mechanism of Trailing Suction Hopper Dredgers (TSHD), sorting out 10 core factors that dominate TSHD pricing ，Focus on a real calculation sheet of how much a TSHD cost.

This guide provides a comprehensive overview of maintaining and repairing key components of a Cutter Suction Dredger, including the cutter head, suction pipe, ladder, pump, spuds, winches, and control system. It details inspection routines, lubrication protocols, cleaning procedures, and specific repair techniques for wear and damage, helping operators minimize downtime and ensure safe, efficient dredging operations.

This practical maintenance manual is developed for long-term high-intensity dredging operations, covering cutter suction (CSD), trailing suction hopper (TSHD), chain bucket, grab, backhoe dredgers and split hopper barges. It abandons fixed schedules and adopts dynamic maintenance cycles based on medium abrasion, corrosion environment and load mode. With refined system maintenance, classified component guidelines, condition-based monitoring and common mistake avoidance, the manual transforms breakdown maintenance into proactive prevention, improving equipment reliability and reducing lifecycle cost under heavy-duty working conditions.

Yanyang Marine, with 30+ years of expertise, launches the world’s largest customizable modular split‑type CSD (max 2200 m³/h) in 2025. As China’s first and the world’s largest fully electric deep‑water environmental dredger, it offers full design–build–delivery services with IACS design and class supervision, ensuring certification and reliability for medium‑to‑large ecological restoration projects.

This article outlines core application scenarios of Cutter Suction Dredgers (CSDs), covering eight major fields: port and waterway maintenance, land reclamation, river and lake management, subsea pipeline trenching, mineral aggregate mining, environmental remediation, coastal protection and reservoir desilting. It details construction difficulties in each scenario and corresponding CSD solutions, analyzes the equipment’s key strengths including precision, efficiency, adaptability and eco-friendly cost-effectiveness, and underscores its vital role in marine, infrastructure and environmental engineering.

A: For domestic coastal engineering vessels (ZC/CCS domestic certificates) such as Split Hopper Barge, Crane Barge, and Deck Barge, Yanyang Marine provides a full one-stop service package to support export and international delivery to foreign buyers. With rich experience in flag registration, one-voyage navigation permit application, communication/navigation safety equipment outfitting, crew deployment, and port provisioning, Yanyang Marine ensures compliance, efficiency, and smooth delivery across global ports.

Amid global green transition and "dual carbon" goals, port ASD tugboats lead electrification ahead of dredgers and crane barges. This article reviews core technologies, global deployment, advantages and challenges, forecasts 2030 smart, long-endurance, multi-energy trends. Yanyang Marine provides customized green-powered ASD tugboat design, construction and full delivery to support global port sustainability.

On March 6, 2026, China’s first ultra-large self-propelled TSHD Xin Hai Jing 1 was successfully launched. Featuring a groundbreaking distributed in-hold pump design and advanced intelligent unmanned dredging technology, it breaks foreign monopoly, with a 27,580m³ hopper and 120m dredging depth, marking a major leap in China’s high-end dredging equipment.

This paper defines the operational scope of the Trailing Suction Hopper Dredger (TSHD), covering applicable engineering projects, sea conditions, and soil types. TSHDs are primarily used for navigation channel dredging, port construction, land reclamation, and coastal regulation projects. They are suitable for open sea and coastal waters with sea states up to 4 and winds up to Beaufort Force 6. These vessels can efficiently dredge soft soils, silt, sand, and other loose to medium-dense underwater materials, demonstrating strong adaptability for conventional offshore works. However, they are not suitable for hard rock, large boulders, or heavily cemented soils.