Cargo Weight Inspection


Archimedes’ Principle (Law of Buoyance)

Archimedes’ principle is the fundamental natural law of buoyancy, first identified by the Greek mathematician and inventor Archimedes in the 3rd century BC. It states that "any object floating upon or submerged in a fluid is buoyed upward by a force equal to the weight of the displaced fluid".

The above is the basic principle of the weight determinations on bulk cargo loaded onboard or discharged from bulk cargo vessels. Draft survey is one of the methods determining the weight of a bulk cargo in an accurate way.

Types of inspection

  • Barge/ ship draft survey
  • Weight inspection by volume measurement
  • Weight supervision by weighing scales
  • Weight supervision by platform scales
  • Weight supervision by weighbridge

Methods/ Processes and Standards

  • International and National Standards such as TCVN, ISO (Vias) 17020, ASTM/ ANSI, IMO, Commercial Law, Maritime Law, and conditions, rules and regulations of  the local countries.

Reports/ Certificates of Survey

  • Daily reports to the client on the progress of inspection with photos reflecting the condition of cargo, loading / discharging operations.
  • 24 hour detailed reporting to the client on any irregularities or any other abnormal situations that may affect quality or quantity of cargo.
  • Provision of certificates in accordance with ISO 17020.

For further detailed information, please contact us at the address below


Address: 26G Le Quoc Hung St., Ward 12, Dist.4, HCMC, Vietnam

Hot line: 0939 33 28 38

Tel: (84-8) 3943 3729                 Fax: (84-8) 3943 5759


Address: 564 Bach Dang Road, Hai Ba Trung Dist., Ha Noi, Vietnam

Hot line: 090 343 5458

Tel: (84-4) 3971 4342                  Fax: (08-4) 3984 6187