Dec 26,2017

Dalian Shipyard: Ship Formation Mooring Operations

The ship formation should comply with the relevant formation principles and determine the formation order according to the arrival time of the barges. The tugboat should slowly approach the head barge from the outboard side of the towed vessel, connect the head towline, stop in time when the stern reaches the head barge, reverse if necessary, and after the vessel is stable, connect the towline. Avoid blindly starting the engine to connect the towline. After connecting the towline, notify the barge fleet to release other mooring lines on the shore. After all mooring lines are released, the tugboat can slowly move forward only after the barge gives the signal to move forward. Gradually use a small rudder angle to make the ship yaw outward, and direct the barge's rudder. Only when the fleet does not obstruct passing vessels and surrounding moored vessels can the tugboat move forward at full speed. When starting after anchoring the formation, before connecting the towline, the anchoring preparation should be completed. The tugboat should approach the head barge from the windward side, take over the towline, connect the long towline, and move forward slowly. When the long towline just rises above the water surface, stop, and after the long towline is under tension, move forward slowly again. Only after the barge completes the anchoring operation can the tugboat tow and start sailing. When releasing or taking in the long towline during navigation, the tugboat should first reduce speed to reduce the surge of the fleet, and direct the steering of each barge. Only when the fleet is stable and straight when turning can the long towline be released or taken in. When releasing or taking in the long towline, pay attention to personal safety. During formation, towing, and releasing or taking in the towline, pay close attention to the dynamics of passing vessels and the surrounding environment. Only when there is no obstruction to other vessels and the safety of the fleet can actions be taken, and signals should be sounded according to regulations. The ship formation should generally be conducted by the chief mate or captain. It is strictly prohibited to use one towline at both ends, and it is prohibited to temporarily draw towlines from the cabin or anchor. When connecting the towline midway, reduce speed and wait for the fleet to stabilize before proceeding. It is strictly prohibited to connect the towline quickly.

Dec 26,2017

Chemical corrosion and protection of ships in seawater

Chemical Corrosion and Protection of Ships in Seawater Due to the long-term exposure of ships to marine environments, the hull is extremely susceptible to corrosion in seawater. The main types of corrosion include electrochemical corrosion, mechanical corrosion, biological corrosion, and chemical corrosion, with electrochemical corrosion being the most significant, involving the generation of microcurrents during the corrosion process. Electrochemical corrosion mainly includes corrosion in seawater, atmospheric corrosion, galvanic corrosion, micro-electrode corrosion, and corrosion under coatings. The mechanism of electrochemical corrosion is the result of a battery effect. The mechanisms of microbial corrosion mainly include cathodic depolarization theory, local battery mechanism, metabolic product corrosion mechanism, acid corrosion mechanism, and anodic fixation mechanism.

Dec 26,2017

Dalian Shipyard -- Teaching you how to maintain and repair

Dalian Ada Shipbuilding Co., Ltd. provides a brief introduction to ship repair and maintenance here. Ship repair and maintenance are to maintain the ship in good technical and seaworthy condition and effectively grasp the technical condition of the ship. Therefore, this system is formulated. First of all, daily maintenance and repair should follow the following principles: 1. Safety first, prevention first, maintenance and repair, and diligence and thrift. 2. Department supervision, station responsibility, and ship implementation. 3. The principle of combining daily maintenance and lay-up inspection and repair. With the above principles in place, we begin daily maintenance and upkeep. The content and plan of daily ship maintenance and repair should be based on

Dec 26,2017

Precautions for loading and unloading ships and boats

Special cargo is often oversized, overweight, and/or over-dimensional, requiring increasingly sophisticated handling and transportation methods. Traditional methods are clearly inadequate. Careful preparation and planning are essential for these types of goods, encompassing aspects such as lifting gear, securing, and operation. Small, multi-functional vessels, inflatable boats, and tugboats represent a particularly challenging subset of special cargo. Their loading and transport are even more complex due to difficulties in identifying secure lifting points, significant self-weight, and uneven stress distribution on the hull. Dalian Shipyard reminds you to remove any parts of the hull not securely fixed to the main structure before transporting the goods.

Dec 26,2017

Dalian Ada Shipbuilding - Preparations before a Dalian ship sets sail

Before departure, the captain shall perform the following duties: Upon receiving sailing orders, immediately announce the departure time, notify crew members to return to the ship on time, and prepare sufficient fuel, materials, and ship's supplies. Check that crew certificates are complete and valid. If there are temporary substitutes, the necessary procedures should be completed. For watchkeeping personnel, a detailed introduction to the ship's equipment and operating performance should be given, and work should be arranged. Check the sailing certificates and other relevant documents of the ship and any attached barges, and check the port entry and exit visa procedures. If dangerous goods are being carried, the dangerous goods transport permit should be processed. Check the ship's and any attached barges' navigational instruments, operating machinery, tools, towing equipment, mooring equipment, and fire and life-saving equipment. If any problems are found, measures should be taken to eliminate them; sailing with defects is strictly prohibited. Check the cargo loading situation. Cargo loading must meet safety requirements; if not, notify the relevant personnel to rectify it in time. Notify the engine room to conduct a comprehensive inspection of the main engine, auxiliary engine, shafting, piping, and electrical equipment, and prepare for departure. Before departure, hold a voyage meeting, carefully implement safety measures, clarify the division of labor, and assign responsibilities to individuals.

Jan 11,2019

Dalian Shipbuilding Industry Corporation: Classification of Ships by Material

Classification of ships by material: Monohull, multihull: Common ships are generally monohulls. Catamarans have two slender hulls and use turbofan engines, propelling themselves forward by the reaction force of water ejected backward. This is faster than ordinary propeller propulsion. At high speeds, the slender hull of a catamaran reduces drag, and the hull is stable and less prone to capsizing. They are often used for ferries and military transport. Dalian Shipbuilding Industry Co., Ltd. * Dalian Ada Shipbuilding Co., Ltd. Hydrofoil: This is a high-speed ship. There are supports and hydrofoils on the bottom of the ship. When the ship accelerates, the hydrofoils generate lift to lift the hull out of the water, thereby reducing water resistance and increasing speed. Hovercraft: A hovercraft is a high-speed vessel that uses air to cushion the bottom, reducing water resistance. Many hovercrafts can exceed 50 knots. The above information is for your reference. Dalian Ada Shipbuilding Co., Ltd. is located at No. 1, Renhai Street, Shuangdao Bay Port Industrial Park, Lushunkou District, Dalian City, Liaoning Province. The company adheres to the design philosophy of "energy-saving, environmentally friendly, safe, reliable, economical and practical new ships." It can conduct research, design, manufacture, sales, and after-sales service for various non-standard ships, including fishing boats, recreational fishing boats, law enforcement boats, tour boats, yachts, cargo ships, offshore crane ships, and offshore aquaculture ships.