Propeller Cavitation Causes and Remedies As the propeller turns it absorbs the torque developed by the engine at given revolutions i.e., the delivered horsepower – and converts that to the thrust which, in turn, pushes the vessel through the water. According to Bernoulli’s law the passage of a hydrofoil (propeller blade section) through the water causes […]
The risk of ballast voyage for LNG carrier Depending upon ship design, it may be necessary to undertake loading / de-ballasting or discharging / ballasting operations simultaneously. If this is the case, consideration should be given to the stability of the ship, especially to free surface effect in tanks, correct use of cargo tank centerline […]
Quick work for ship ballast water treatment As the IMO ballast water treatment requirement rolls out, equipment vendors are competing to offer shipowners the most flexible, useful systems possible. This means delivering reliable compliance in a wide range of water conditions, but it also means meeting operators’ needs – like minimum holding time. Alfa Laval’s […]
Ballast operation at sea and ballast exchange requirement When the ship is not carrying cargo or is lightly loaded, sufficient ballast must be carried to ensure that the ship’s stress, stability, draft, trim and propeller immersion is within permissible limits to guarantee the safe handling of the vessel in the prevailing or expected conditions. In […]
How ballast water systems work for ship A ballast water system is essential for the safe operation of a ship, but the operation of these systems causes significant threats to the environment and local economy. What Is a Ballast Water System? A ballast water system allows a ship to pump water in and out of […]
How to Operate a Ship Ballast System What Is a Ballast Water System? A ballast water system allows a ship to pump water in and out of very large tanks to compensate for a change in cargo load, shallow draft conditions, or weather. The capacity of ballast water tanks might be millions of gallons on a […]
Dynamic positioning operator for ship You would use computer systems to control a ship so it can stay in one position and remain stable in the sea. Your vessel could be a ship or a semi-submersible involved in : Supplying offshore oil and gas platforms. Drilling operations. Laying pipes on the seabed. Setting up renewable […]
Dynamic Positioning Operation For Ship Rudder Dynamic positioning (DP) is a computer-controlled system to automatically maintains a ship’s position and heading by using its own propellers and thrusters. Position reference sensors, combined with wind sensors, current sensors and gyro compasses, provide information to the computer pertaining to the vessel’s position and the magnitude and direction […]
Fire Prevention For Tugboats Fire prevention on boats – common causes of fire : Smoking below decks. Galley cookers. Build-up of butane or propane gas in the bilges. Faulty wiring. Petrol/gasoline vapour in engine bay. Flammable paints and solvents. The best way to deal with fires on board ships is to prevent them rather than […]