Automatic Identification System (AIS) Solution Sealite’s AIS solutions are available in Type 1 or Type 3 and operate on the international VHF Maritime Mobile Band, enabling Port Authorities and other users to remotely monitor the real-time status of their AtoN installations. The Type 1 or Type 3 AIS solutions can be configured to a range […]
Ship watertight bulkheads pressure testing After installation of the bulkheads, they are to be tested for their integrity and water tightness. Since it is not feasible to fill all the cargo holds or compartments with water for this purpose, the test is done by a pressure hose. In this process, the bulkhead is subjected to […]
Construction of ship watertight bulkheads The primary function of watertight bulkheads is to divide a ship into a number of watertight compartments. Though most watertight bulkheads are transverse in orientation, some ships also have longitudinal watertight bulkheads within a compartment for longitudinal compartmentalisation within a compartment. Other than watertightness, the transverse bulkheads also add to […]
Collision bulkhead in ship The safety of a ship in damaged condition is majorly dependent on the strength and integrity of its watertight bulkheads. There are a lot of factors that go into deciding the position of watertight bulkheads in a ship, and designing them structurally. Watertight bulkheads are vertically designed watertight divisions/walls within the ship’s structure […]
Steering Gear System In Ship The efficiency of performance of steering gear depends on some main aspects. These basic requirements to be invariably met by all steering gears are guided by rules set by classification societies. They can be briefly outlined as : As per standard requirements, the steering gear should be capable of steering […]
Steering gear application in ships We are all familiar with the use of a rudder, which helps in turning a ship as and when required. Rudders are the principal system for the entire motion and control of the ships. But we mustn’t forget that the entire rudder action is dependent on another pivotal system called the […]
Problems found in steering gear system of ships A vessel, under pilotage, departed a port in ballast and was down bound in a restricted waterway. The engine control was set to bridge control and a helmsman was using manual full follow-up (FFU) steering. At one point a port alteration was requested; however, the rudder angle indicator […]
Turbocharging principles and construction By turbocharging an engine, the following advantages are obtained : Increased power for an engine of the same size OR reduction in size for an engine with the same power output. Reduced specific fuel oil consumption – mechanical, thermal and scavenge efficiencies are improved due to less cylinders, greater air supply […]
Air start valve The valve is fitted into the cylinder head. It is opened by control air from the starting air distributor. The valve shown is from a slow speed MAN-B&W two stroke engine but a lot of modern engines have valves working on similar principles and design. Materials The body of the valve could be […]
Air starting valve of main engine The air starting valve of a marine engine is responsible to start the engine from a standstill or stop position. It also helps in reversing and emergency stopping or crash stopping of the engine if needed. The Air starting valve is fitted at the centre of each cylinder head, […]