Bunker Quantity Survey

Survey types in addition to Bunker Quantity Survey

Remaining on Board (ROB) Survey

This is to establish the exact quantity of all fuel on board the vessel. The appointed Surveyor will therefore physically measure and take temperatures of all fuel tanks on board and ensure the tank reference heights are correct by comparing them with the calibration tables. The Surveyor will also compare the measured quantities with the declared logbook and arrival (FWE) figures from the vessel. ROB Certificate with all quantities will be issued.

Sludge Survey

This is to establish the exact quantity of sludge discharged from the vessel to a bunker tanker or truck. The appointed Surveyor will therefore physically measure all sludge related tanks before and after discharge and the bunker tanker or truck before and after receiving the sludge. The Surveyor will also record the fuel consumption data in combination with the amount of sludge produced on board since the last sludge disposal, so percentage of sludge against fuel consumed can be calculated and mentioned in the final report.

Sampling Surveys

The Surveyor will draw representative individual tank samples using a level sampler where the tank access via the trunk or manhole is available. The bottom sampler will then be used to take an absolute bottom sample. All samples will be sealed and distributed accordingly. Once collected, we ensure that all samples are brought back to one of our laboratories in order to start with the analysis as soon as possible to guarantee quick results.

BQS with Mass Flow Meter Assessment

Singapore MPA has implemented mandatory use of Mass Flow Meters for all bunker fuel supplies in the port from 1st January 2017. VPS has been closely involved during the development phase, and one of the key findings has been: quantity shortage claims between the supplying barge and the receiving vessel will remain- as the receiving vessel will continue to use their own measurement to determine their received quantity.

The BQS with Mass Flow Meter Performance investigation service will assist the dispute resolution process as it will be carried out by instrumentation engineering experts specializing in MFM technology and:

  • Reviews the dispute claim between supplied and receive quantity difference
  • Proposes necessary MFM document access
  • Investigates MFM working data, covering items such as MFM transmitted logged data in ASCII format, transmitter setting, stored value verification etc.
  • Based upon findings, recommends whether the MFM meets operating conditions or not, in an unbiased manner
  • If the requirements are not met the MFM technologist develops robust reasoning and recommendations to our clients.
Quick Screening Mass Flow Meter Profile evaluation service

The intention of this service is to provide a quick “Pass / Fail” preliminary guide on the performance of the Mass Flow Meter, based on the meter profile and the field documents as obtained by the VPS Surveyor and assessed by the in-house VPS Flow Technologist. This “Pass / Fail” rating will form part of the Bunker Quantity Survey report, so the information can be received in a timely manner.

Mass Flow Meter operation is not “Plug & Play” and dispute resolution will be complex if a set of procedures is not available to do a preliminary round of checks based on existing parameters. This is also the intention of the new VPS Quick Screening service where we will do a meter profile evaluation of mass flow, air index, temperature, density, drive gain, damping etc. Field Documents checks on calibration certificate, zero verification report etc. will also form part of this quick screening assessment.

Should the Quick Screening evaluation result in a “Fail” rating, then a more comprehensive investigation of the Mass Flow Meter can be initiated where required.


bunker survey