The concept of electric propulsion is not new, the idea originated more than 100 years ago. However, with the possibility to control electrical motors with variable speed in a larg... Read more
If the current lags the voltage by 90° as shown in a pure inductor—the instantaneous power shown by the heavy curve is positive in the first ½cycle and negative in the second ½ cyc... Read more
Electric power generation based on rotating prime movers and electric generators, is a mature technology, but there is continuously being evaluated alternatives to the traditional... Read more
What is ship Ballast? Heavy material, such as pig iron or water, stored in the bottom of the ship to keep her steady. Modem ships have ballast tanks built into them. When a ship ha... Read more
Isambard Kingdom BRUNEL (1806-1859) English engineer. Designed and built the Great Western, the Great Britain and, his greatest achievement, the Great Eastern. Sir Anthony DEANE (c... Read more
Once in a while you may read or hear of a ship “breaking her back” while laboring in a heavy sea, or through suffering structural damage in running aground, or perhaps in a collisi... Read more
While at anchor the vessel’s fire alarm sounded on one of the lower decks. The OOW sent the duty seaman down to investigate. The crew member found a deck-head fluorescent light rel... Read more
Azimuth thrusters are thrusters that can be rotated in order to produce thrust in any direction. The thrust is controlled either by constant speed and CPP design, variable speed FP... Read more
Most air circuit breakers used for generator and power switching systems are provided with an automatic release mechanism. Those that do not have an ‘undervoltage‘ or... Read more
A bulk carrier was on a ballast passage and conducting ballast exchange operations when a large gate valve in the engine room on the ballast/bilge system failed, causing severe flo... Read more
