Category: Marine Cargo Surveyor

Petroleum Calculation Series: Definition

marine cargo ship surveyors

 

Ambient Temperature: The temperature of the surrounding medium such as the atmosphere.

API: American Petroleum Institute.
API Gravity (Relative Density): A means used by the petroleum industry to express the density of petroleum liquids. API gravity is measured by a hydrometer instrument having a scale graduated in degrees API.  The relation between API gravity and relative density (formerly called specific gravity) is: API Gravity at 60 Deg. F. = (141.5 : Relative Density 60F/60F) – 131.5

ASTM: American Society for Testing Materials. Grade and quality specifications for petroleum products are determined by ASTM test methods.

Barrel: The standard unit of liquid volume in the petroleum industry. It is equal to 42 U.S. gallons.

BS & W: Bottom sediment and water.

Bunkers: Fuel for a vessel. The type will vary depending upon the propulsion mode of the vessel. Steamships will use a heavy fuel oil, diesels use a range of fuels from heavy to light, and gas turbines generally use kerosene

Cargo Pump: Pump used on tankers for discharging cargo and loading or discharging ballast. Located, at the bottom of the pump room, these pumps are usually of the common duplex type, or turbine type of which the centrifugal is the most common.

Clingage: The residue that adheres to the inside surface of a container, such as a ship’s tank or shore tank, after it has been emptied.

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Draft Survey Software

marine cargo ship surveyors

I have tried to complete the sevensurveyor project and developed one simple software for draft survey calculation named 7S DraftSurvey.

This software is made for automatic draft survey calculation such as; quartermean draft, trim, fore and aft draft corrections, Displacement, TPC, LCF, MTC, 1st & 2nd trim corrections, density correction, and deductibles. The software could be used to determine the total cargo loading/unloading on the shipboard.

It is very simple and helpful to cut down the time for draft survey calculation. What you have to do is just inserting some data in the initial draft survey and get easy calculating for any intermediate and final draft survey with insert the reading draft, density, and sum of deductibles only. This software designed to handle the ship with reading draft marks up to 27.00 Meters.

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Software for Marine Cargo Surveyor

marine cargo ship surveyors

Just go to this link for downloading: http://sevensurveyor.com/software/. The list of software will be growing, I will load additional software when available.

Just leaving your comment about Software for Marine Cargo Surveyor.

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Surveyors / 65GTW3KC3KQP

PS: If you need the complete calculation software you could search on the web, it is available to buy online. For the ASTM Table complete version, you could check at this link http://www.astm.org/BOOKSTORE/ADJUNCT/ADJD125010.htm

Draft Survey: The Accuracy and Factors Effecting

Sometimes the accuracy of Draft Survey is a big question, especially when the cargo loaded or discharged from the vessel shown extremely different weight with the references Weight Scale or Counter Weight. Unfortunately, the parties concerns would be doubt on to the weight resulted by Draft Survey, as they have been relying upon the mentioned scales for many years.

Draftmark

Draught Survey UN ECE: Code of Uniform Standards and Procedures

UN ECE was published the Factors Affecting Draft Survey as follows :

1- Incorrect hydrostatic information or draft marks: Investigations carried out in specially performed draft surveys have indicated that there can be significant errors in the determination of displacement due to typographical errors or arithmetical errors in the ship’s hydrostatic tables. This could be improved if the tables furnished to the surveyor bore an approval stamp by the flag government or the classification society. A number of years careless re-painting of draftmarks, especially if they have not been permanently marked on the hull, can cause erroneous readings. If there is any doubt, the draft marks should be re-sited at the next dry-docking.

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Bunker Survey Calculation

marine cargo ship surveyors

The bunker calculation is simple and needs the following:
– Tank Sounding data and Tank Capacity Table. The Corrected Sounding means below is the sounding after correcting with vessel’s trim and list.
– Temperature of Oil on Tanks,
– Oil Density @15*C,
– Table ASTM 54B (VCF) and Table ASTM 56 (WCF).

Now we could go with sample of 1 tank to test the calculation.

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How to Conduct Bunker Survey

What is Bunker Survey? The survey is carried out to measure and ascertain the quantity of Bunker on board at the specific time. This survey is produced the report that states the amount of bunker, usually Fuel Oil (FO) and Diesel Oil (DO), and sometimes Lubricating Oil (LO) is included.

marine cargo ship surveyors

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Surveyors Moved

 

marine cargo ship surveyors

 

If you stucked here, moving is the best idea to improve your performances

Good Day All..

Thanks for you all that has been accessed and comments given during the time.

In this good time, I am announced that www.surveyors.wordpress.com has just moved to the new address at www.sevensurveyor.com. Eventhough, you could access it form the both addresses.

Hope marine cargo surveyor could find this site more attractive and readable. Your contribution to improve this site is highly appreciated.

Regards,
Surveyors