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FOREWORD

This publication is intended to encourage the development of uniform practices for measurement of cargoes aboard marine tank vessels. It presents current methods of cargo measurement, but this is not intended to preclude the use of any new technology or the revision of the methods presented. To gain a better understanding of the methods described in this publication, the reader should review in detail the latest editions of the referenced publications.

Metric units are listed in this document in a manner that reflects current marine practice.

Nothing contained in this publication is intended to supersede any operating practices recommended by organizations such as the Oil Companies International Marine Forum or individual operating companies, nor is the publication intended to conflict with any safety or environmental considerations, local conditions, or the specific provisions of any contract.

All procedures described in this publication should be performed by or in the presence of the ship's master, the barge captain, or their representatives. For reasons of safety, only nonsparking equipment shall be used for measurements on board marine tank vessels.

This standard requires the purchaser to specify certain details and features. Although it is recognized that the purchaser may desire to modify, delete, or amplify sections of this standard, it is strongly recommended that such modifications, deletions, and amplifications be made by supplementing this standard, rather than by rewriting or incorporating sections thereof into another complete standard.

API standards are published as an aid to procurement of standardized equipment and materials. These standards are not intended to inhibit purchasers or producers from purchasing or producing products made to specifications other than those of API.

API publications may be used by anyone desiring to do so. Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal, state, or municipal regulation with which this publication may conflict.

Suggested revisions are invited and should be submitted to the director of the Measurement Coordination Department, American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005.