MARINERS VOICE

 Major accommodation fire occur in gallery while cooking. Incase of fire in oil pan  Use fire blanket to extinguish the fire  Incase of electrical fire. Isolate the electrical supply. Use portable co2 extinguisher. If fire intensity is high. If its not extinguished by fire blanket or co2 portable fire extinguisher.  Switch off the galley supply and exhaust fan. And pull the emergency lever to shut off exhaust hood ventilation, Which will placed in galley or entrance of galley. Close the galley door. Rise the fire alarm, from nearest call point. Inform the bridge or ship office incase ship is in port.. Confirm the galley entrace door and ventilation  and electrical supply is shut off. Release the fixed fire fighting System if installed there. Otherwise use water and portable extinguisher to fight the fire .. Please write your comments below the comments box.

  MARPOL ANNEX 2 REGULATION FOR CONTROL OF POLLUTION BY NOXIOUS LIQUID SUBSTANCE IN BULK . APPLICABLE TO: ship which carrying noxious liquid substance and chemicals In bulk, NOT APPLICABLE TO: Harmful substances carried in any kind of package. Liquid substance and chemicals which are carried in bulk annex 2 came into force on 6th April 1987, Carriage of chemical covers under two main conventions. SOLAS CHAPTER 7 MARPOL ANNEX 2 both of the conventions required chemical tankers which are buit after 1st July 1986 to comply with international bulk chemical code  IBC (INTERNATIONAL BULK CHEMICAL CODE) IBC CODE booklet carried all ships which carrying chemicals and noxious liquid substance in bulk by sea. It contains  some safety standards  which are to be maintained while carriage of dangerous chemicals and noxious liquid substance in bulk. It also sets out minimum design and construction of these vessel. Ibc code contain complete list of chemicals and their environment hazard rating, Asper

  4stroke fuel injector overhauling Remove the cap nut  Remove the lock nut and adjusting screw, Remove the nozzle retaining nut. Now Remove the nozzle and distance piece Remove the dowel pin. Remove the push rod  and spring and spring seat. Remove the needle from Nozzle. Now clean the parts  And reassemble.

 2 stroke fuel injector overhauling. Remove the 'o' rings  Remove the valve holder and valve head, Slack the union nut  Now valve head come separately Remove the trust spindle. Remove the spring and spring seat. Remove the trust foot. Remove the spindle guide and nozzls. Now clean the parts  And assemble properly.

  Lubrication oil properties of refrigeration compressor? Should have low floc point  Should have low pour point. Should not react with REFRIGERANT Stability Defoaming character. Dielectric strength. How will you select REFRIGERANT ? High critical temperature Low critical PRESSURE Latent head of vaporization Eco friendly.

  Refrigeration Reduce the temperature of the space is called refrigeration. Air conditioning   It control the temperature and humidity in the space together with circulation, And filtering and refreshing the air. Ventilation? Circulation and refreshing of ir in the spce without changing of temperature.

  NAVAL TERMS PART 2 WAKE? Wake is the motion of water at stern of the ship is because of ship's movement. Longitudinal center of floatation? It is a point about which trim will change when loading and unloading. Net tonnage? It is the volume of all spaces where cargo is loaded. Gross tonnage? It is the total volume of enclosed spaces in ship. Light weight? Mass of the empty ship without any effect (cargo,fuel,water,crew) Dead weight? Total weight of cargo fuel, water, crew except ship's weight. Permeability? Percentage of empty volume  in a ship. Buoyancy? Upthrust force applied by the water to the ship. Reserve buoyancy? Volume of enclosed space above the water line. Fresh water allowance? When a ship moves from sea water to fresh water there will be increasing draught. Docking allowance? When a ship is moving sea water to docking water there will be  increasing draught. Propeller pitch ratio? Its a face pitch divide by diameter. Slip? The difference between the speed of the

  NAVAL TERMS PART 1 Length over all (loa)? Greatest length of the ship, measured from forward extreme to aft extreme. Lenth between perpendicular? Distance measured from aft perpendicular to forward perpendicular. Forward perpendicular? The summer load water line cut the stem in one point that point is called forward perpendicular. Aft perpendicular? The summer load water line cut the aft of the rudder post. That point is called aft perpendicular. Breadth extreme? The greatest breadth  of the ship measured from outside if the ship's shell. Breadth module? The distance measured from inside of the ship's shell. Depth extreme? The distance measured from top of the deck to bottom of the keel. Depth module.? The distance measured from bottom of the deck to top of the keel. Draught extreme? The distance measured from water line to top the deck. Draught module? The distance measured from water line to bottom of the deck. Free board? Distance from waterline to top of the deck. Camber

  CHOCKS & HOLDING DOWN BOLTS  is used fix the bef plate to the tank top. Functions:-  any variation in tank top will not affected to engine,  To avoid the misalignment of engine. End chock will absorb vibration and noise of engine & trust. Side chock absorb unbalanced forces due to the rotating parts of engine. MATERIALS . CAST IRON EPOXY RESIN (mostly used) Cast iron  Required experts for installation. And high expensive Epoxy resin  Cost effective Non corrosive 100% contact even rough surface. Fixing of EPOXY RESIN chocks . Clean the surface Prepare chocks mixture Prepare die or dam for chocks  Fix holding down bolts, And power mixture around the insert the bolts  Note the temperature of the mixture (not more than 25°c) Tight the holding down bolts with hydraulic jack with required pressure. Dry upto 48hours.

  Bed plates are in foundation of engine, and which is responsible for strength a d rigidity of other components of engine. Material   FABRICATED STEEL  Forces acting on bed plate   GAS PRESSURE INERTIA FORCE OF MOVING PARTS HULL DEFLECTION. THERMAL STRESS 

 

  Ballast water management:  Must have approved ballast water management plan. Approved ballast water treatment plant. Must carry ballast water record book  International ballast water management certificate. Must install ballast water treatment plant. Mlc2006  SEAFARERS employment agreement. Payment of wages. Ship board harassment  Health and safety of SEAFARERS. Solas and marpol . Data consumption system for fuel oil on ship more than 500gt and above. BND every bunker specified the sulphur content. Inclusion of BALTIC SEA and North sea into ECA nox area. Global sulphur limit. 0.5mass/mass Energy efficiency design index. Maintain electronic record book. Blatic sea special area for passanger ship annx4 Passanger ship must be fitted with RRS (release and retrieve system) All ship must have communication instruments. Designed for fire fighting team atleast 2 for each fire party. Audible alarm device notify low level air pressure in scba . 135 letter extinguishers not required for BOILER.

  Basic rules of crank case Safety arrangements Crank case and inspection door should be exhibiting strengthen construction. Should be fitted with one or more non return  relief  valves in each cylinder of crank case. And these valve should be arranged as their outlets protected from flame discharge in case of explosion  Total clear area  through the relif valves should not less than 9.30cm2/m3 gross crankcase volume. If engine is  not more 300mm cylinder bore with strongly constructed crankcase.  If such engine not more than 150mm cylinder bore. No needs to fitted with relief valves. Lub oil drains pipe from the sump to drain tank must be extended to well below the working oil level in the tank. If multiple engine installation. Drain and vent  arranged  so that flame of explosion can't pass from one engine to another engine. Diaphragm must be fitted near mid length to prevent the passage of flame.if the engine having more than 6 cylinder. 

  Doesn't Deliver liquid  Priming liquid is insufficient. Pump speed is insufficient. Discharge pressure is excessive Direction of rotation is wrong Suction line ruptured Pressure loss in suction. Insufficient capacity, crackling noise from the pump casing, Air leaking in suction line  Pump speed is insufficient Suction lift is excessive Clogged in impeller passage Worn wearing or impeller or stuffing box packing or sleeves  Doesn't develop enough discharge pressure Speed of the pump is insufficient. Air or gas in the liquid being pumped. Mechanical defects such as worn in wear rings or Leak in seals , impeller damage, Working for while and suddenly fails to deliver liquid Air leaking in suction line . Air leaking in stuffing box clogged water seal passage.

 Rated full load current. Ip number (indicated the degree of protection) Rated speed. Rated frequency Rated voltage Power rating Type  3phase indication motor  Connection (delta) Weight Serial number Bearing (drive end non drive end)

440v Earth fault is considered as a emergency onboard  For some ships have trips for 440v earth faults. For 3000v and  above its mandatory to to fit the trip protection against earth fault. How to find the earth fault in 440v? When you hear the earth fault alarm, inform the electrical officer if he is board. Check the alarm, sometimes false alarm will rise. Test the alarm using test button, Or if we have integrated automation system, we can check by  software. Now isolate the whole 440v system (but its not possible to isolate 440v, is because some machinery can not we isolate like steering gear & lub oil pumps.  So we can use standby options.  Keep checking on the system one by one, we will find the earth fault machinery. HOW WILL YOU FIND THE EARTH FAULT IN 220 V?  For 220 v earth fault is not consider the major emergency onboard. But any way we have to find the faulty lighting circuit. First of all check the alarm which is working properly or not using test button. Then isolate t

  Types of fuses  High reputuring  capacity fuses. Cartridge fuse  Semi enclosed fuse. SURVIVER MAY ASK HOW WILL YOU ORDER FUSES?   CURRENT RATING VOLTAGE BREAKING CAPACITY FUSE TYPE  FREQUENCY PRODUCT TYPE.

 MCB - Miniature circuit breaker- 5- 50 amp MCCB -  moduled case circuit breaker 50-1500amp ACB - Air Circuit breaker- 400-2000amps Acb safeties   Arc runner arc chutes  Breaker open fast before taking out acb  Simultaneous closing of all 3 units of each phase. Breaking speed as High as possible.

  Types of starters? Dol (direct online starter)-  (5hp) Star delta starter- (5 hp to 20 hp) Auto Transformer - (20 hp to 50hp) Soft starter - (above 50hp) Where its used onboard? Dol  starter Boiler feed pump  Circulating pump  Gear pump  Bilge pump  Fwg distilled pump  Stern lub oil pump.   Star delta starter  Jcw pump (HT and LT) Ballast pump  Sea water pump. Auto Transformer Bow thruster  M/e lo pump  Soft starter Washing machine  Spring drier  Grinder.

WHAT IS WELDING TRANSFORMER?  IT IS A STEP DOWN TRANSFORMER USED TO REDUCE THE VOLTAGE APPROXIMATELY 15V - 45V TO PRODUCE THE CURRENT OF 200- 600AMPS IN SECONDARY WINDING, PRIMARILY WINDING->THIN WIRE AND MORE TURN(BECAUSE LOW CURRENT THIN WIRE CAN CARRY) SECONDARY WINDING ->THICK WIRE LESS TURN(HIGH CURRENT IS PROVIDED) CONSTRUCTION OF WELDING TRANSFORMER? It is a auto Transformer It has a magnetic field core with primary winding which is thin wire and large number if turn. A secondary winding with less turn thick wire. Due to this arrangement its a step down Transformer. So we get less voltage and high current output. DC WELDING TRANSFORMER  is also same working like ac welding Transformer. But in dc welding Transformer rectifier is provided to convert ac, in out put of   secondary winding. Also connect a indictor or filter to get the smooth dc current, This is the construction of welding Transformer. (Please check  the image) Working of welding Transformer? Its is the step dow