Author Archives: Marine Study

About Marine Study

"For Maritime Education and Knowledge"

Crankcase inspection

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Isolated and Earthed Neutral System

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Ship Rudder

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Accidental Agrounding: Chief Engineer’s Responsibility

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Checking Performance of Main Engine

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Isolation of One Unit of Main Engine

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Ship Motons and Stresses

Ship Motion and Stresses from Mohammud Hanif Dewan MIMarEST, MRINA

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Chemical Tanker Market

Chemical tanker market from md. tanvir hossain

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Closed loop control Main Engine Jacket Cooling System

By Mohammed Ismail

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Ship Structural Components

Ship Structural Components from Mohammud Hanif Dewan MIMarEST, MRINA

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Ship’s Transverse Stability

Ship's Transverse Stability from Mohammud Hanif Dewan MIMarEST, MRINA

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Onboard Lubricating Oil Tests

(By Kamal Hossain, Chief Engineer) (a) Explain how lubricating oil can be tested onboard. Answer: L.O can be tested on board by using Maker’s supplied test kit , which can give the result whether it is safe for further use … Continue reading

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Boiler Water Tests

(By Kamal Hossain, Chief Engineer) Q. (a) Explain why regular testing of water in auxiliary boiler is advisable (b) How to take correct sample (c) Discuss what factors are necessary when measured value differ appreciably from desired value in each … Continue reading

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Summary of Steering Gear Regulations & Requirements

(By Kamal Hossain, Chief Engineer) SOLAS  REGULATION & REQUIREMENTS FOR STEERING GEAR Steering gear compartment must be separated from machinery spaces and readily assessable. Every ship shall be provided with main steering gear and auxiliary steering gear. The failure of … Continue reading

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UMS System Failure

(By Kamal Hossain, Chief Engineer) It is complete failure of the UMS, bridge control and data logging system has failed and the main engine is needed to run on manual control and monitoring. (a) State with reasons six main items … Continue reading

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Chief Engineer Responsibilities During Bunkering Operation

(By Kamal Hossain, Chief Engineer) Pollution prevention Pre-bunkering meeting should be held , quantity , grade and distribution plan to be drawn up. By considering of volume allowance is 10 ~ 15 % for expansion , all tanks to be … Continue reading

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Effects of Impurities in Fuel Oil

Q. Write brief notes on the adverse effects that a fuel containing high value of the following may cause: (a) Viscosity (b) Density (c) Sulphur (d) Corodson Carbon Residue (e) Asphaltene (f) Vanadium & Sodium (g) Ash (h) Water (By … Continue reading

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Ship Charter

F R Chowdhury In shipping when a ship is hired it is always referred to as being on charter. The owner of the ship is still referred to as the owner and one who hires the ship or space thereof … Continue reading

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Boiler Water Treatment

By Maklub Al Mostofa Scale formation and corrosion are the main two factors that determine the efficiency of the internal parts and as well as lifetime of the boiler. Badly corroded and scaled boiler can fail within very short time. … Continue reading

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Scavenging and Turbocharging (Questions & Answers)

By Maklub Al Mostofa Q. What is scavenging? Name the types of scavenge used for large two stroke engine. Describe the advantage of Uniflow scavenging. SCAVENGING: It is the removal of residual exhaust gas and its replenishment with fresh air in … Continue reading

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Oil Record Book (Questions & Answers)

By Maklub Al Mostofa QUESTIONS: How to put entry in ORB? What is action in case of wrong entry? How many people fill up and sign it? What is your action if an entry is missed? What is your action … Continue reading

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Enclosed Space Entry

By Maklub Al Mostofa Enclosed Space: For the purpose of this Guide, an ‘Enclosed Space’ is defined as a space that has the following characteristics: Limited openings for entry and exit. Unfavourable natural ventilation. Not designed for continuous worker occupancy … Continue reading

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PORT STATE CONTROL (PSC)

F R Chowdhury Image Credit: ClassNK 1. What is PSC: It is customary to respect law of the land. You will appreciate that I will have to comply with laws of Malaysia so long I am in Malaysia no matter … Continue reading

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CoC Oral Exam Questions Bank

By Maklub Al Mostofa Maritime Regulations and Survey Describe Safety construction survey and items to be surveyed. Describe Load line survey. Purpose of load line survey. Why do we need load line certificate? Describe LOAD Line convention. Why load line mark … Continue reading

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LNG Ships

By F. R. Chowdhury Image Credit: Liquefied Gas Carrier.com Properties of LNG: LNG is actually METHANE. Purity of cargoes ranges from 67% to 99.5%, according to geographical location. Impurities consist mainly of Ethane and Propane. LNG is: Non – toxic … Continue reading

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The Origin of Shipping & Insurance

By F. R. Chowdhury Shipping is one of the oldest businesses in the world. Risk management and insurance is also equally old business. They are closely linked with one another. In fact the development of insurance took place in support … Continue reading

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Survey, Audit & Certification for Ships

Compiled by F. R. Chowdhury  Image Credit: ClassNK 1. Certificate of Survey: – This is done on behalf of the Flag State prior to the registration of the vessel to establish the authenticity/ identity of the vessel and to ensure … Continue reading

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Wärtsilä EnergoProFin Propeller

Image Credit: Wärtsilä The efficiency of the ship’s propeller is an important part of a ship’s overall propulsion efficiency. The Wärtsilä EnergoProFin has become a popular retrofit solution to improve the propulsion efficiency and hence improve the fuel efficiency of … Continue reading

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Ignition Quality Parameters of Slow Speed Diesel Engine

Ignition quality parameters: Energy Viscosity Maximum firing pressure. 4. Injection delay 5. Ignition delay . 1. Energy comparison • The injection pump is a volumetric pump • The higher the density the more energy it contains per volume unit • The … Continue reading

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Guidance to Deck Officers While Loading Grain

Author: Capt. Kamal Ahmed.   I was once hired by my client to get the approval for loading by the Port Warden in the 2nd loading port as the actual healing moment was more than the permissible healing moment. The … Continue reading

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Planning & Preparation of Dry Dock as a Chief Engineer

Image Credit:  www.rbrodarstvo.com Preparations: Dry docking survey is to be done every 2 ½ years interval , 2 times in 5 each year cycle , called annual docking and special docking survey. Special survey is carried out every 5 years … Continue reading

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CoC Oral Exam Preparation (Part – 19): Engine Room Watch Keeping

Watch Keeping in Engine Room: Image Credit: www.jamstec.go.jp A. Handing over a watch: Engineers on ships perform their duties in rotational shifts, each having fixed and equal number of hours. This work shift, also known as a watch, needs to … Continue reading

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CoC Oral Exam Preparation (Part – 18): Electrical Miscellaneous

Servicing a motor effected/washed by seawater: Cut out power supply by circuit breaker & taking out fuse. Mark & disconnect supply wire. Took Megger reading & recorded. Take out the motor, open up & dismantle. (Make sure marking on both … Continue reading

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Shipboard Preparation for Ice in Winter Season

Image Credit & Author: Captain Kamal Ahmed. Preparation Prior making a voyage into subfreezing zone, Master must ensure that the vessel is suitable for navigating in that zone, crew are duly trained, well protected with PPE and necessary gears and … Continue reading

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CoC Oral Exam Preparation (Part – 17): Boiler Safety Valve

Boiler Safety Valves protect the boiler from over pressurisation. As per the requirements, at least two safety valves should be fitted to the boiler and both are mounted on a common manifold with a single connection to the boiler. Boiler with … Continue reading

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High Pressure Water Mist (Hyper Mist) System

Mandatory in passenger ships with GT > 500 and cargo ships with GT >2000, for fire extinguishing in machinery spaces of category A with volume > 500 m3 (IMO MSC/Circ.913). System introduced as an alternative to the Halon systems (prohibited in 1994) … Continue reading

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CoC Oral Exam Preparation (Part – 16): CO2 Flooding System

 Requirements of CO2 Room: In CO2 flooding system, carbon dioxide bottles are placed in a separate room. The requirements for location, accessibility, use and ventilation of CO2 storage spaces as per IMO are: Spaces for storage of cylinders or tanks … Continue reading

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CoC Oral Exam Preparation: (Part – 15): Fire & Safety

Fire Hose: At least one fire hose for each of the hydrants and hose shall be used only for extinguishing fires and testing purposes. (Passenger Ship) One for each 30m length of ship and one spare, but not less than … Continue reading

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CoC Oral Exam Preparation (Part – 14): Ship’s Certificates

Certificates onboard: 1.Certificate of Registry 2. International Tonnage Certificate 3. International Load Line Certificate 4. International Load Line Exemption Certificate 5. Certificates for Master, Officers and Ratings 6. Derating or Derating Exemption Certificate 7. International Oil Pollution Prevention Certificate 8. … Continue reading

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CoC Oral Exam Preparation (Part – 13): Entries of Important Documents

OIL RECORD BOOK: Entries to be made in Oil Record Book as per MARPOL Annex I Requirements: Oil Record Book: PART – 1 (MARPOL Annex I Regulation 17):  Entries: Ballasting or Cleaning of fuel oil tanks Discharge of dirty ballast … Continue reading

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CoC Oral Exam Preparation (Part – 12): Stern Tube

Image Credit: www.libramar.net Stern Tube: The stern tube is a hollow tube-like structure at the stern or rear part of the ship. A ship needs the propeller to drive it forward in water. The propeller, located outside the ship, needs to … Continue reading

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IMO is on Full Speed Ahead with COP21 Agreement

Image Credit: www.imo.org The Paris Climate Change conference (COP21) 2015 Agreement identifies a clear goal on two objectives: holding the increase in the global average temperature to well below 2°C above pre-industrial levels and to pursue efforts to limit the temperature … Continue reading

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CoC Oral Exam Preparation (Part- 11): Propulsion Machinery

Image Credit: Wikipedia.org FUEL INJECTION TIMING Checking of fuel injection pump timing: Turn 1 piston to TDC at the beginning of firing stroke. Turn backward to a point, a little earlier than fuel injection point. Shut fuel supply to engine, … Continue reading

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CoC Oral Exam Preparation (Part-10): Ship Construction

Image Credit: wikipedia.org Definitions and Ship’s Dimensions Hull: The structural body of a ship including shell plating, framing, decks and bulkheads.  Afterbody : That portion of a ship’s hull abaft midships.  Forebody: That portion of a ship’s hull forward midships. … Continue reading

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CoC Oral Exam Preparation (Part – 9): Refrigeration & Air Conditioner

Image Credit: almaco.cc Refrigeration:  What is a Refrigerant? Refrigerants are used as working substances in a Refrigeration systems. Fluids suitable for refrigeration purposes can be classified into primary and secondary refrigerants. Primary refrigerants are those fluids, which are used directly … Continue reading

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CoC Oral Exam Preparation (Part – 8): Air Compressor

Air Compressor Image Credit: leelloyds.com Effects of leaking valves in Air Compressor: First Stage Suction: Reduce air delivery Reduce 2nd stage suction pressure Unload the compressor Increase running time. First Stage Delivery: Reduce air delivery Increase discharge temperature Less air … Continue reading

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Ventilation Arrangement for Hazardous Spaces in Engine Room

The following engine room spaces are very hazardous on-board the ship and therefore, a special ventilation arrangement should be provided for safe entry: (a) CO2 storage compartment (b) Battery room (c) Purifier flat (d) Refrigerating machinery space (e) Shaft tunnel … Continue reading

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CoC Oral Exam Preparation (Part-6) – Boiler Operation & BW Treatment

Boiler : Boiler Automatic Burning System: 1. With correct water level, steam pressure transmitter initiates cut-in at about 1.0 bar below working pressure. 2. Steam pressure transmitter initiates Master Relay to allow ‘Air On’ signal to force draught fan. 3. … Continue reading

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CoC Oral Exam Preparation (Part- 5) – Boiler

Exhaust Gas Boilers: About 30% – 34% of Fuel Energy input to engine are discharged to Exhaust Gas, as Thermal Energy. This thermal energy is converted into useful work in Exhaust Gas Boiler. Cochran Exhaust Gas Boiler: 1. A double-pass, … Continue reading

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CoC Oral Exam Preparation (Part- 4) – Lub Oil & Fuel Oil

Image Credit: lube-oil.in Lubricating Oil Viscosity: 1. A measure of internal resistance to flow. 2. Viscosity of an oil changes with temperature, falling when temperature rises and vice versa. 3. For crankcase oil, viscosity is between 130 – 240 Sec. … Continue reading

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CoC Oral Exam Preparation (Part- 3) – Electrical

image credit: www.rchelectrical.co.uk Electrical Survey: Electrical equipment inspected and tested, during complete engine survey, at 4 years interval. Such a survey is prescribed, under the rules and regulations for the classification of ship. Following survey items generally apply to all … Continue reading

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CoC Oral Exam Preparation (Part- 2) – Survey & Certification

Image Credit: Marinelink Survey: Authorised independent examination, investigation, and inspection, measuring or testing of ship structure, machinery and equipment, done and supervised by Surveyors appointed by regulatory or commercial organisations. Classification Societies: They are third party independent bodies e.g. ABS … Continue reading

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CoC Oral Exam Preparation (Part- I) – Machinery

Source: MAN Diesel (MAN-B&W-K98MC) Cylinder liner wears: 1) Normal frictional wear: Due to metal to metal contact with high surface asperities under marginal lubrication condition. 2) Abrasive wear: Due to presence of hard foreign particles from fuel, LO, and air. … Continue reading

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Main Engine Air Starting System

By Mohammed Ismail

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Star-Delta Starting of Three Phase Motor

By Mohammed Ismail

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DIESEL ENGINE CRANKCASE EXPLOSION

INTRODUCTION: For any fire to begin, the fire tringle needs to be completed. To complete a fire tringle there must be present of a combustible material, oxygen or air to support combustion and a source of heat in proportional ratio … Continue reading

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Latest Development on EU-MRV

Monitoring Reporting & Verification (MRV) is a standardised method to produce an accurate CO2 emissions inventory, through the quantification of CO2 emissions. The key principles of the scheme are to generate robust results using a lean approach considering parameters which are … Continue reading

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Ships, I Sailed

Ships, I Sailed from Mohammud Hanif Dewan, IEng, IMarEng, MIMarEST, MRINA

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Energy, Greenhouse Gas Emissions, and Climate Change

A documentary video, developed by the Saskatchewan Environmental Society is an introduction to energy, greenhouse gas emissions, and climate change. This video is a component of the Student Action for a Sustainable Future Program in Saskatoon, Saskatchewan. Source: Saskatchewan Environmental … Continue reading

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Algae to crude oil – Innovation of a Green Energy Source

Image Source: www.pnnl.gov The PNNL (Pacific Northwest National Laboratory) Engineers have created a continuous chemical process that produces useful crude oil minutes after they pour in harvested algae — a verdant green paste with the consistency of pea soup. In … Continue reading

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Cylinder Lubrication System

Cylinder lubrication in a low-speed main propulsion diesel engine: Cylinder lubrication For marine diesel engines operating on residual fuels containing sulphur, cylinder lubrication must generally serve the following purposes: ■ Create and maintain an oil film to prevent metal to … Continue reading

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The Triple E Ship’s Concept for More Energy Efficiency

Image Credit: www.maersk.com The Triple E Ships can be more energy efficient and more environment friendly. Triple-E (EEE) stands for Energy efficient, Economy of scale and Environmentally improved vessel: Energy Efficiency: Triple-E ships are designed and optimised for lower speeds. The unique … Continue reading

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Novec 1230- the Next Generation of Halon and CO2

Image Credit: www.protec.co.uk Novec 1230, C6F12O, (3M Novec 1230) fluid is a low global warming potential Halon replacement for use as a gaseous fire suppression agent. Novec 1230 is manufactured by 3M. This Fire Protection Fluid is an advanced, “next-generation” … Continue reading

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On the way of innovation- the Most Energy Efficient Car!

Impressive news from the new Prototype CNG category late yesterday afternoon: team Microjoule-La Joliverie pulled off a 2,521km/litre equivalent first attempt (imagine driving from Rotterdam to Palermo on one litre). New category, new benchmark. The first UrbanConcept challenge started this … Continue reading

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Problems in Boilers

Image Credit:www.globalspec.com   Some common boiler problems are described below: Fires Cleanliness of the heat recovery surfaces after the boiler can often be judged by observing the gas pressure differential above and below. Any significant rise in this value should … Continue reading

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Latest Development on Energy-efficiency in International Shipping by IMO (MEPC 68th session)

(Energy-efficiency and air pollution implementation at IMO environment meeting, Marine Environment Protection Committee (MEPC), 68th session.11-15 May 2015) Further development of energy-efficiency guidelines for ships The MEPC continued its work on further developing guidelines to assist in the implementation of … Continue reading

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The Cylinder Liner

The Cylinder Liner of Diesel Engines from Marine Study

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Wärtsilä 50DF engine capables to operate on ethane gas

The market leading Wärtsilä 50DF marine engine has been successfully tested and certified to run on ethane (LEG) fuel. The extensive and successful testing programme was carried out by Wärtsilä in close collaboration with Evergas, a world renowned owner and … Continue reading

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Wärtsilä to deliver scrubber systems to clean the exhaust from two Dutch RoRo carriers

Royal Wagenborg, the Dutch ship owner and operator, has ordered Wärtsilä scrubber systems to clean the exhaust emissions from two of its RoRo carriers, the ‘Balticborg’ and ‘Bothniaborg’. These will be Wärtsilä’s first deliveries of its scrubber systems to Royal … Continue reading

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Boiler Water Treatment

In the draft “Code of practice for the design, safe operation, maintenance and servicing of boilers”, a requirement is made for regular water-quality monitoring of both limited-attendance boilers and unattended boilers.

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Audi E-Diesel- Fuel of The Future

After a commissioning phase of just four months, the research facility in Dresden started producing its first batches of high‑quality diesel fuel a few days ago. The Dresden energy technology corporation sunfire is Audi’s project partner and the plant operator. … Continue reading

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Mobile and Internet Services for Cruise Ships by MCP

33 Cruise-Ships with Mobile and Internet Services from MCP. 09 January 2015, Arendal, Norway: MCP has signed a long-term contract with Carnival Corporation to provide 33 cruise ships with advanced mobile cellular communication services. The agreement provides close to 130,000 … Continue reading

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Hull Appendage MT-FAST for Ship’s Energy Efficiency

The hull appendage MT-FAST is an energy-saving device that greatly reduces fuel consumption. Its multiple blades are fitted ahead of the ship’s propeller to reduce the swirl generated by propeller revolutions and thereby enhance propulsion efficiency.

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Electric Mobility: Hybrid Electric Ship

By Siemens. Today, the frequency converter, by way of the electric motor, controls the propeller rotation speed directly. As a result, the propeller can turn much more slowly. In order to maintain a vessel’s position at sea or to move … Continue reading

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Flettner Rotors- The Wind Turbines as Ship’s Propulsion

By Enercon GmbH. The E Ship 1, with four tall pillars rising vertically from the ship, two forward and two aft, is using Flettner rotors as ship’s propulsion. The Flitner rotors technology was first developed in the 1920s by German … Continue reading

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Sky Sails Propulsion for Ships

(Image Credit: SkySails GmbH) Wind is the cheapest, most powerful, and greenest source of energy on the high seas. With SkySails, modern cargo ships can use the wind as a source of power – not only to lower fuel costs, … Continue reading

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Wartsila’s New Fuel-efficient Tanker Design

Image: Wärtsilä The new Aframax design emphasizes energy efficiency to provide lower operating costs and enhanced environmental performance. The ship features an optimized hull form to minimize resistance, and an optimized propulsion train with energy saving devices (ESDs) for greater … Continue reading

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A Combined Wind & Solar Power Solution for Ships

By Greg Atkinson, Eco Marine Power. A Combined Wind & Solar Power Solution for Ships From small powered pleasure craft and ferries to large super-tankers, the limitless energy of the wind and sun can be used in order to help … Continue reading

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Impressed Current Cathodic Protection (ICCP) System

HOW DOES AN ICCP SYSTEM WORK? – Using an arrangement of hull mounted anodes and reference cells connected to a control panel(s), the system produces a more powerful external current to suppress the natural electro-chemical activity on the wetted surface … Continue reading

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Waste Heat Recovery System

Waste Heat Recovery System (WHRS) uses exhaust gas from the diesel propulsion system to produce additional energy cleanly and inexpensively. By reducing energy costs by up to 12%, reducing CO2 and NOX emissions, and significantly lowering maintenance expenditures, the system gives … Continue reading

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Green Ship Technology for Energy Saving by Air Carpet

Image credit: Mitsubishi Accelerating the development of innovative technologies to reduce CO2 emissions from vessels is essential to both cope with rising fuel costs and to improve the world environment. This can be achieved through the development of various CO2 … Continue reading

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Metallurgical Testing

Metallurgical Testing from Mohammud Hanif Dewan, IEng, IMarEng, MIMarEST, MRINA

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“Liability In Maritime Collision Case: How Is Fault Apportioned?”

By Capt. Sabbir Mahmood.

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Engine Bearings

By Marine Study

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Bearings Clearance Basics – Circle Track Magazine

Bearings Clearance Basics – Circle Track Magazine. (Author: Jeff Huneycutt)

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Thrust Bearing Clearance

Thrust Bearing Clearance: Measure main thrust journal width and thrust bearing width, refer to FIGURE 1, as follows: (1)Measure width of main thrust journal with an inside micrometer. (2)New main thrust journal width is 1.531 to 1.535 inches (38.90 to … Continue reading

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Tools, Valves and Materials for Marine Use

By Kazi Md. Abu sayed

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Ship Construction (Structure Part)

Ship Construction (Structure Part) from Marine Study

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Boiler Mountings

By Engr. Omar Sadath

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Introduction of Boilers

By Engr. Omar Sadath

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Classification Societies

2 classification societies from Sulaiman Oladokun

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Emission from ship

Emision from ship from Oladokun Sulaiman

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ILO and IMO- Maritime Law

Ilo imo from Oladokun Sulaiman

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Watch keeping duties , responsibilities and cargo documentation

Watch keeping duties , responsibilities and cargo documentation from Oladokun Sulaiman

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STCW

Stcw from Oladokun Sulaiman

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“Materials Used in Shipbuilding”

MATERIAL USED IN SHIP BUILDING  

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CoC Oral Exam Preparation (Part – 20): EKG

  How does emergency alarm ring? Ans:    Continuous ringing of bell. Emergency situation is explained at the muster situation. Pattern of Emergency signal is indicated on Muster list Q. Explain the Fire Tube and Water Tube Boiler. Fire Tube Type: … Continue reading

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Question and Answer for Oral Exam, Part – 1

What is I.S.M. ? The International Management Code for the Safe Operation of Ships and for Pollution Prevention (International Safety Management (ISM) Code).  What is I.M.O. Convention ? Conventions are chief instruments of IMO, being binding legal instruments, regulating some … Continue reading

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Marine Engineer Officer Class- 1 (Unlimited) CoC Oral Exam Preparatory Course Syllabus as per IMO Model Course 7.02

Department of Shipping, Bangladesh approved MEO Class- 1 (Unlimited) CoC Oral Exam Preparatory Course as per IMO Model Course 7.02 from Mohammud Hanif Dewan

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Marine Engineer Officer Class-2 & 1 (Unlimited) CoC Exam Preparatory Course Syllabus as per IMO Model Course 7.02

Department of Shipping, Bangladesh approved MEO Class-2 & 1 (Unlimited) CoC Exam Preparatory Course as per IMO Model Course 7.02 from Mohammud Hanif Dewan

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