ship handling

Home page|| Tanker Notes || Container Ship Operations || Ocean Navigation ||

Caution to be given to Ships Bunkering operation

The Chief Engineer shall check the refueling work with the Bunkering Check List and endeavor to prevent marine pollution. Cargo information: Should be obtained from supplier

bunkering procedure at ship
Bunkering procedure at ship

Designation of personnel to engage in FO transfer work

The Chief Engineer shall decide a personnel positioning suitable to the actual condition of the vessel referring to the attached the Designation of PIC of Oil oil transfer operation , and draw up the List of Personnel to Engage in FO Transfer Operation.

During the Bunkering operation, the Chief Engineer, the engineer in charge, the member in charge of watching the hose connection and the sea surface shall not hold other jobs (for example, maintenance work) concurrently.

Preparation of piping diagram

The Chief Engineer shall prepare a piping diagram of the FO transfer equipment suitable to the vessels equipment according to sub-item (2) of the Fuel oil Transfer Procedures.

Inspection and maintenance of refueling equipment

The Chief Engineer shall inspect and service positively the refueling equipment, utilizing the PMS, and carry out the inspection before entering a port in accordance with the Bunkering Checklist

(a) Deck scupper:

While Bunkering, the deck scuppers shall be closed with a expandable rubber plug, and if the use of a expandable rubber plug is improper, a wooden plug shall be put, which shall be cemented up with suitable putty.

Note: The opinion of the USCG is, From a viewpoint of prevention of marine pollution, an expandable rubber plug, screw type plug or a mechanical closing device should be used to all scuppers on the upper deck.

(b) Procedures for pressure test of refueling line

(i ) Pressure range

From the valve on the on-deck riser for each FO tank to the shore connection.

(ii ) Test pressure

The U.S. CFR require that it is confirmed that a static liquid pressure at least 1.5 times the maximum allowable working pressure does not cause any leakage. Valves used for refueling lines are usually of 5 kg/cm2 from which a test under 7.5 kg/cm2 is assumed, but a test pressure of 4.5 to 5.0 kg/cm2 is enough because the maximum actual working pressure on board the vessel is 3 kg/cm2 or so.

(iii) Test method

The test shall be a pressure test by general purpose air of the vessel. The line shall be checked for leakage by visual inspection after applying soap liquid and check of pressure drop after shutdown of air supply.

Preparation of check list for open / closed condition of refueling-related valves

The Chief Engineer shall prepare a check list which employs the vessels valve names (it is desirable to mention both the name and valve No.) to check open / closed condition of valves related to refueling work (including valves to separated the refueling line from the other lines), and shall endeavor to confirm open / closed condition of valves at the beginning of refueling and change over of tanks, and the restored condition of the refueling line at the completion of the refueling, to prevent a wrong valve operation.

Bunkering under rainy weather

When the Bunkering operation is carried out under rainy weather, the Chief Engineer shall enhance monitoring capability as required for prevention of marine pollution including an increase in number of watchmen on the deck. Water puddles on the deck shall be discharged through a scupper after it has been confirmed that no oil floats on the puddles. It shall be positively confirmed that the scupper has been closed after the discharge without fail.

Bunkering at night

When the Bunkering operation is not completed in the daytime, the Chief Engineer shall secure the enough deck lighting to illuminate the following places:

Hose connection areas (on the vessel and on the barge)

FO Transfer areas on the barge.

FO Transfer areas on the vessel.

Note: Enough illumination required by the USCG is shown below:

5.0 ft. cd for hose connection area.

1.0 ft. cd for FO transfer work area


Should any abnormality is felt or reported, the Chief Engineer shall stop the oil transferring immediately, investigate the possible causes, and shall not restart the oil transferring until the causes have been removed completely.

Should any oil leakage is discovered or reported, the Chief Engineer shall take necessary measures for ''Oil Pollution Accident''

Measuring operation of Hydrogen Sulfide (H2S)

Immediately after commencement of bunkering operation, the engineer in charge shall measure the H2S gas concentration through the air vent of Fuel Tank, under supervision of the Chief Engineer. In case the H2S gas density is higher than 10ppm, following measures have to be taken:

The personnel in charge of bunker operation at site shall put proper PPE (a gas mask)

The openings to the accommodation area near fuel tank air vent shall be closed completely

To keep persons away from FO Air Vent, other than the persons in charge

Until completion of bunkering, the gas concentration measuring shall be carried out at regular interval (at least once in an hour).

Toxicity Hazards

Toxicity – is the ability of a substance to interrupt the correct function of bodily organs. Toxic cargoes are harmful if they are inhaled or swallowed or absorbed into the body through the skin. Most of the chemical cargoes as well as some crude oils and petroleum products are toxic or contain toxic components.

The Master must ensure that all ship’s personnel are aware of the toxic characteristics of cargoes on board. When handling a cargo which may be toxic the precautions contained in MSDS, and ISGOTT to be followed. In case of any accident involving dangerous, hazardous or harmful substances, the IMO Medical First Aid Guide (MFAG) and IMO Emergency Procedure for Ships Carrying Dangerous Goods (EmS) are to be followed.

The Company provides various gas detection equipment, including Draeger Multigas Detector with special tubes to monitor the level of different dangerous gases in ship’s compartments. The Chief Officer is responsible for up keeping the stock and ordering of any additional Draeger Tubes or gas detection equipment required for the cargo to be loaded.

Information regarding the health hazards of the cargo can be obtained from Product Data Sheets or Material Safety Data Sheets (MSDS). The most common term in use within the industry for determination of product toxicity is Threshold Limit Value (TLV).

Related articles

Safety precautions prior transferring oil

How to report in case of an oil spillage onboard

How to use low sulphur fuel oil onboard

Bunkering arrangement and safety factors onboard

Bunkering safe procedure and detail guideline for ships

Safety checks prior discharging sludge from ship to reception facilities

Bulk liquid cargo handling - Ship to shore safety checklist

Ship-to-ship transfer / Operational guideline and check item for oil tankers

General precautions for tankers

Safety precautions prior transferring oil

Reporting oil spillage in foreign ports

How to use low sulphur fuel oil onboard

Operational guideline during bunkering

Fuel oil sulpher quantity frquently asked questions

What is fuel oil additive ?

Guideline for Proper heating of Fuel Oil storage tank

Dealing with low quality fuel oil

What is the procedure for fuel oil viscosity control ?

How to keep a sample of fuel oil received ?

How to keep bunkering record ?

Procedure for receiving lub oil

Precautions prior transferring fuel oil into storage tanks

Ships bunkering guideline- planning, preparation, safety checks & confirmation

Safety precautions prior transferring oil

Bunkering arrangement and safety factors onboard

Bunkering safe procedure and detail guideline for ships

What is fuel oil additive ?

Dealing with low quality fuel oil

How to keep a sample of fuel oil received ?

How to keep bunkering record ?

Acceptance / rejection of fuel in a quality dispute

Precautions prior transferring fuel oil into storage tanks

Requirement of towing arrangement in oil tankers, readyness, & training onboard

How to deal with ships power failure ? ....

Other info pages !

Ships Charterparties Related terms & guideline
Stevedores injury How to prevent injury onboard
Environmental issues How to prevent marine pollution
Cargo & Ballast Handling Safety Guideline
Reefer cargo handling Troubleshoot and countermeasures
DG cargo handling Procedures & Guidelines
Safety in engine room Standard procedures
Questions from user and feedback Read our knowledgebase is merely an informational site about various aspects of ships operation,maintenance procedure, prevention of pollution and many safety guideline. The procedures explained here are only indicative, not exhaustive in nature and one must always be guided by practices of good seamanship.

User feedback is important to update our database. For any comment or suggestions please Contact us
Site Use and Privacy - Read our privacy policy and site use information.
Terms and conditions of use

Copyright © 2015 All rights reserved.