Marine System

Gross Tonnage image 1. Gross Tonnage This is a function of the volume of all ship's enclosed space (from keel to funnel) measured to the outside of the hull framing. Then the Gross Tonnage can be obtained with following formula :                                       Gross Tonnage (GT) = k1.V          Where :              k1 factor  = 0.2 + 0.02*Log10(V)                                (0.22 up to 0.32, depending size of the ship)              V (m3)     = Volume displacement 2. Net Tonnage This is based on a calculation of the volume of all cargo spaces of the ship. It's indicates a vessel's earning space and is a function of the moulded volume of all cargo spaces of the ship.   Net Tonnage image Therefore the Net Tonnage can be obtained with following formula : Net Tonnage (NT) = Max. of B + k3*(N1+N2/10) or (abt. 0.3*GT)   Where :               B    = Max. k2*VC*A or 0.25*GT               k2   = 0.2+0.02Log10(VC)               VC  = Tota

GENERAL Fire-extinguishing medium Where the quantity of the fire-extinguishing medium is required to protect more than one space, the quantity of medium available need not be more than the largest quantity required for any one space so protected. The volume of starting air receivers, converted to free air volume, shall be added to the gross volume of the machinery space when calculating the necessary quantity of the fire-extinguishing medium. Alternatively, a discharge pipe from the safety valves may be fitted and led directly to the open air. Means shall be provided fore the crew to safely check the quantity of the fire-extinguishing medium in the containers. Containers for the storage of fire-extinguishing medium and associated pressure components shall be designed to pressure codes of practice to the satisfaction of the Administration having regard to their locations and maximum ambient temperatures expected in service. Installation requirements The piping for t