China’s rigid pipelay fleet ranks 1st in Asia-Pacific and 3rd globally. Its DP3 vessels excel in deepwater operations and operate worldwide, while DP2 and non-DP vessels serve mid-deep and shallow waters respectively. Unlike wind farm installation vessels, top-tier pipelay assets have solid market prospects with no major overcapacity risks.

Master the versions of international second-hand ship sale and purchase contracts! This guide covers mainstream MOA formats (NSF 2012, BIMCO SHIPSALE 22) Essential for maritime shipping trade practitioners, lawyers and brokers.

2026 Complete Guide to Offshore Vessel Certificates. Covers registration, classification, SOLAS, MARPOL, MLC, insurance, DP, SPS/IP, lifting equipment, MEG4, CMID/SIRE 2.0. Updated with PSC inspection items, correcting outdated errors. Essential for offshore vessel compliance, PSC checks and charterer audits.

This document summarizes most of China Classification Society (CCS) classed full-revolving floating cranes in China as of 2026, categorized by dynamic positioning (DP) level: DP3, DP2, DP1, and non-DP. The fleet shows a highly unbalanced distribution between South and North China, with over 70% operating in southern waters. Several vessels are working overseas in the Middle East and Southeast Asia, reflecting growing Chinese participation in international offshore wind, oil & gas, and heavy-lift markets. Newbuild deliveries since 2022 are substantial, indicating potential oversupply and intensified competition ahead.

All electric driven 85meters Platform Supply vessel now under building, delivery time around end of this year now open for sale from Yanyang Marine

Port & waterway dredging unit price data for Grade 1- 4 conditions, covering basin, deep-water, back-siltation and secondary reclamation works.

As a vessel, to be put into operation and maintain normal operations, it is subject to various requirements and constraints imposed by both international and domestic regulations. Whether from the perspective of operational legality or the vessel’s safe structural integrity and equipment configuration, all aspects must comply with the relevant laws and regulations and must hold valid certificates that meet the requirements of these laws and regulations.

This document details the operating principles of hydraulic opening cylinders and split hopper barges, illustrating the coordinated interaction between the pump power station, the hydraulic power system, and the actuating cylinders.

ZC historically refers to China's domestic government ship inspection authority, focusing on mandatory statutory compliance for vessels operating strictly within Chinese inland and coastal waters with limited international recognition. In contrast, CCS (China Classification Society) is an independent, IACS-member classification society that provides both technical class certification and statutory services accepted globally, enabling ships to engage in international trade and meet worldwide safety standards.

Grab dredgers are widely used in port maintenance, river dredging, and environmental remediation projects. Understanding their operational workflow—from digging and lifting to disposal—and accurately estimating production capacity is critical for efficient project scheduling and cost control. This guide presents the standard engineering formulas for calculating hourly and daily output, including key factors such as grab capacity, cycle time, fill factor, swell ratio, and barge logistics constraints.

This paper introduces the standard method for calculating dredging quantity based on the Design Code for Dredging and Reclamation Works (JTS181-5-2012). It explains the composition of total dredging volume, determines over-depth, over-width and slope ratio by dredger type and soil condition, and details three widely used calculation methods: cross-section area method, average water depth method and grid method. The calculation must include design section quantity, over-break quantity and siltation quantity. The complete process meets the requirements of design, budget and construction approval.

This article examines the future of offshore piling, focusing on deep-water challenges (hydrostatic pressure, vessel motions) and high-efficiency piling vessel design. Yanyang Marine provides advanced, customized solutions for safe, efficient deep-water piling operations.

This guide helps select the right grab dredger by comparing clamshell and orange peel grabs—their suitability for soft mud, hard clay, rock, and other soil types. Yanyang Marine provides customizable, reliable grab dredgers for diverse dredging needs.

This TCO analysis compares Chinese and European dredgers, evaluating CAPEX, OPEX (fuel, maintenance, spare parts), performance, and reliability. Yanyang Marine delivers competitive, high-quality dredgers with optimized total cost of ownership and global support.

The 2026 global dredging market is set for strong growth, fueled by port expansion, land reclamation, and coastal protection needs. Focus on high-growth opportunities in Southeast Asia and the Middle East, where infrastructure investments drive demand. Yanyang Marine offers tailored, advanced dredging solutions to capitalize on these trends.

This document provides a complete, authoritative system of dredged soil and rock classification and standards, integrating the latest domestic and international specifications including JTS 181-5-2012 and PIANC Report No.144-2016. It defines soil categories, rock strength criteria, 13-grade dredgeability classification, and technical indicators for engineering design, equipment selection, bidding, pricing, and construction management.

This paper focuses on the intelligent and full-electric integrated development of azimuth stern drive (ASD) tugs. It analyzes technical systems, application status, quantitative advantages, core challenges and future prospects, providing a reference for green and smart upgrading of port tugboats.

This paper briefly introduces reef blasting vessels, a special equipment for underwater rock removal. It covers basic structure, working principle, technical features, application fields and typical engineering cases, to provide a clear overview for engineering and technical reference.