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.

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

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.

China’s export restrictions on large dredgers are a universal national security policy, not a sanction against specific nations. Driven by strategic concerns in the South China Sea, the policy aims to prevent the proliferation of "island-building" capabilities to potential rivals

This guide elaborates on the mainstream standard MOA formats of international second-hand ship sale and purchase contracts. It also analyzes the core contractual clauses based on English law, clarifying the key points for the smooth progress of second-hand ship

Professional processing guide for engineering vessels temporary registration and single voyage international certificate. Includes applicable vessel types, eligibility, validity, legal effect, required documents, full processing procedures, towing requirements, exemptions, compliance highlights and professional assistance from Yanyang Marine.

This paper systematically explains the whole process and practical operation of marine engineers taking delivery of international secondhand ships, combined with the Norwegian Standard Form (NSF93). It includes pre‑delivery inspection, ship following, pre‑registration, on‑site handover, underwater survey, fuel and lube oil verification, document handover, dispute resolution and post‑delivery work, so as to help buyers avoid transaction risks and complete ship delivery smoothly.

This document specifies the standardized safety management procedures for cutter suction dredgers in offshore construction, covering vessel mobilization and demobilization, on-site construction control, equipment inspection, confined and hot work management, and hidden danger rectification. It clarifies requirements for navigation alerts, communication, certification, emergency plans, and operational discipline to prevent collisions, mechanical failures, suffocation, fire, and other hazards, ensuring safe and compliant dredging construction.

This article by Yanyang Marine—boasting 30+ years of second-hand vessel trading experience and rich export cases of dredgers, pile driving barges, crane barges, and offshore vessels—systematically explains the full handover process for second-hand vessel transactions. It covers core buyer and seller preparation, key details of MOA drafting and negotiation under Norwegian Saleform 2012, pre-delivery preparation, legal and physical handover requirements, and post-delivery procedures. It also highlights Yanyang Marine’s one-stop professional services to help dredging and marine engineering enterprises avoid risks and ensure smooth vessel transactions and exports.

This paper focuses on second-hand engineering vessels such as dredgers and floating cranes, explaining the definition, logic and core roles of the international ship sale compliance matrix. It lists six core compliance modules, points out domestic ship export compliance flaws, and highlights full-process compliance control for safe cross-border vessel transactions.

This article specifies the complete after-sales service system for high-value exported engineering vessels including dredgers,motor hopper, pile drivers and floating cranes. Covering the whole process from contract signing to warranty management, it includes pre-delivery training, vessel transportation assistance, on-site commissioning, remote technical support, spare parts supply, on-site repair and software upgrading, aiming to ensure stable operation and minimize downtime for shipowners, complying with international and industry practices.

Based on Announcement No. 28 of 2017 issued by the Ministry of Commerce and the General Administration of Customs ,the export of dredgers(dredging vessels) from China is subject to export control and a licensing system. Dredgers meeting the controlled parameters must first obtain the "Export License for Dual-Use Items and Technologies" from the Ministry of Commerce, and then complete all subsequent compliance procedures with customs, classification societies, and maritime authorities before they can be legally exported.

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 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.

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.