This category contains Marine Technical Articles

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Boiler easing gear

Boiler Easing Gear

Boiler Easing Gear Why is it fitted? As per SOLAS chapter II-1 regulation 32 “Every steam boiler and every un-fired steam generator shall be provided with not less than 2 safety valves of adequate capacity. However, having regard to the output or any other features of any boiler or un-fired steam generator, the administration may…

DRY DOCKING COST

  HOW TO PLAN BUDGET FOR DRY DOCKING DRY DOCK COSTING AND BUDGET The commercial operation of bulk carriers tankers and Container vessels follow a pattern of movement or transportation called world wide tramping whereby the ships have to sail in accordance to instructions and directives from charterers and the route programs are not fixed…

propeller shaft Withdrawal,survey assembly

Withdrawal of Propeller shaft, survey and assembly

Withdrawal of Propeller  shaft, survey and assembly propeller shaft Withdrawal,survey assembly propeller shaft Withdrawal,survey assembly .All large  single screw  ocean  going  ships   have   solid flanged  propeller  shafts, which  necessitates  the  withdrawal  of  the  shaft  within  the  machinery    The  Rudder is  ;positioned  just  behind  the  propeller and  hence  prevents  the  outward  withdrawal  of  the  shaft…

Ship Anchor – Complete Information

Ship Anchor – Complete Information Introduction The  anchoring  equipment of  a  ship  comprises  the  anchor, anchor  chain  and  the  windlass. The  anchoring  equipment  as required herewith  is  intended for  temporary   mooring  of  a  ship  within  a  harbour  or  sheltered  area when  the  ship  is  awaiting  berth, tide etc. The  modern ship’s anchor  is  called  ‘Stock-less …

Mechanical/Hydraulic Governors -Why fly weights are driven at a higher rotational speed than the engine?

Why fly weights are driven at a higher rotational speed than the engine? * Fly weight equipped governors work on centrifugal force. The centrifugal force acts upwards and the spring force acts downwards. * This difference between the spring and the fly weights is called the governor effect, which is responsible for moving the pilot…

watertightness of watertight bulkhead

How watertightness of watertight bulkhead maintained where bulkheads are pierced by longitudinal beams or pipes

How watertightness of watertight bulkhead maintained where bulkheads are pierced by longitudinal beams or pipes. The watertight bulkheads are provided in the ship for the following purposes; Strength: provide major resistance to hogging, sagging, racking, water pressure etc. Separation – segregates incompatible cargoes and dissimilar compartments. Safety (fire) – provide main vertical zones for the…