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Water - Fixed Fire fighting system. The capacity of the fire pumps is calculated as a product of the breadth, depth and length of the vessel but need not exceed 25m. For cargo ships of 150 gross tons or more, a minimum of one fixed power pump and one portable pump are to be provided. For cargo ships of less than 150 gross tons, one portable pump or alternative , is to be provided. which meets the criteria listed later. The suction head in ope.

Faults associated with Spur and helical gearing. Hammer like action between teeth caused by variations in pitch or torsional vibration , may be negated by nodal drives. The mechanism for pitting is poorly understood . One theory is that it starts below the surface and parallel to it . When extended to surface oil under hydrodynamic pressure is forced in. Most severe on the pitch line or just below it , but may also be found on the dedendum. New gears suffer initial .

Advantages of Helical and Double Helical gearing. Complete absence of pinion shuttling obviates the use of sliding couplings. No axial thrust and no high speed thrust bearings required. Final reduction wheel located by propeller thrust bearing. Ball and roller bearings may be used to take end thrust. Small helix errors can be perfectly co.

This is a gas which contains insufficient oxygen to support combustion of hydrocarbons. This is a system specially designed to supply cool, clean, pressurised, monitored and controlled inert gas. Opposite to inerting and is the replacement of an inert atmosphere with one of fresh air. The use of the term Inert Gas. This may have three sources. Gas oil or heavy oil powered i.