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 Updated with PSC inspection items, correcting outdated errors.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.

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.

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 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 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 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.

This paper introduces the working principle, technical performance and construction technology of dipper dredgers, and focuses on the core hourly Output Calculation formula for dredging operations. It provides the official reference table of bucket filling coefficient fm for different soil categories including sand, clay, gravel and rock, as well as the recommended loosening coefficient (bulk factor) values for silt, clay, sand, gravel and weathered rock. These standard parameters can effectively support accurate productivity estimation, construction scheme design and on-site operation of dipper dredgers in waterway dredging and channel maintenance projects.

Looking for the full list of TSHD core dredging equipment? This expert guide covers all core dredging components for Trailing Suction Hopper Dredgers, including the four key components: drag head, dredge pump, high-pressure water jet pump, and heave compensator, as well as other supporting core equipment: drag arm, hopper, A-frame hoist, dredging winch, overflow system, bow discharging system, and the leveling rake for shallow sweeping. We systematically explain each component's structure, working principle and operational key points, providing actionable technical references for your dredging operations.

This article systematically introduces auxiliary vessels and equipment for cutter suction dredgers, with practical selection logic based on real project conditions rather than rigid standards.

A comprehensive list of ASD tugboat deck machinery, including towing, anchoring, mooring, auxiliary and fire-fighting equipment, with detailed specs and layout points for technical reference.

This document provides a complete guide to the daily maintenance, periodic care, and fault analysis of the hydraulic system for cutter suction dredgers. It covers pre-operation checks, running monitoring, oil management, temperature control, and solutions for low pressure, slow movement, noise, overheating, and oil emulsification. Aimed at improving stability and efficiency, it offers clear troubleshooting steps and best practices for dredger operation and maintenance teams.

Comprehensive manual for dredging mud pump, including common faults, troubleshooting methods, on-site maintenance operations, practical repair cases, and safety guidelines. Suitable for engineering and maintenance personnel to quickly solve on-site problems.

his document details the core configuration of dredging instruments, classification of monitoring systems, technical performance, vessel grading, positioning methods, and construction technologies of cutter suction dredgers. It emphasizes that the dredging system is a comprehensive engineering system based on flow, concentration and output monitoring, supported by torque, pressure and vacuum monitoring, combined with high-precision BDS/DGPS positioning, and developing towards intelligent optimization and green construction.

This document briefly introduces main dredging instruments (pressure gauge, flow meter, densimeter, loading indicator, drag head depth position indicator) and two types of dredging monitoring systems (basic and extended) of trailing suction hopper dredgers, as well as its construction technology.

This document systematically introduces the basic concepts, performance, processes, methods, parameters and quality control of trailing suction hopper dredgers. It covers hopper loading, reclamation, shallow-spot removal, clay bow-discharge and 21 construction methods, providing complete technical guidelines for dredging and reclamation projects.

This document outlines the architecture and ecosystem of offshore wind power systems. It details the five core components—turbines, foundations, substations, cabling, and onshore connections—and all kinds of vessels involving in wind farm projects. The report analyzes the industry supply chain, cost distribution, and the specific opportunities for marine power systems, including propulsion for installation vessels and backup generators.