0.    INTRODUCTION

       This specification provides the definition of the Tank status
       report message (TANSTA) to be used in Electronic Data
       Interchange (EDI) between trading partners involved in
       administration, commerce and transport.

1.    SCOPE

1.1   Functional Definition

       A message from a vessel to the shipplanning department of a
       shipping line and vice versa (e.g. via satellite), giving
       details about the contents of ballast tanks, fuel tanks, water
       tanks and other figures necessary for the calculation of the
       stability of the vessel.

1.2   Field of Application

       The Tank status report message may be used for both national
       and international applications. It is based on universal
       practice related to administration, commerce and transport, and
       is not dependent on the type of business or industry.

1.3   Principles

       This message serves to transmit information about all non-cargo
       deadweight items on board a vessel. This includes all ballast
       and service tanks, stores, crew and effects and other
       miscellaneous items including deadweight constants.
       
       The message can be used for transmission of either current or
       forecast status of tank and deadweight items. For example, the
       message may be used to transmit information relating to an
       actual departure condition from one port but can also be used
       to transmit data relating to a forecast arrival condition at
       another port.
       
       In general, the message will be generated on board by the
       ship's operator and transmitted to other parties interested in
       the vessel's stability and safety. This is normally the
       operations or tonnage centre but may also be a third party such
       as a terminal operator.
       
       In certain circumstances the message can also be transmitted to
       the vessel. In this case the contents of the message may be
       used to advise the ship's master of a desirable arrival
       condition.

2.    REFERENCES

       See UNTDID, Part 4, Chapter 2.6 UN/ECE UNSM - General Introduction,
       Section 1.

3.    TERMS AND DEFINITIONS

3.1   Standard terms and definitions

       See UNTDID, Part 4, Chapter 2.6 UN/ECE UNSM - General Introduction,
       Section 2.

4.    MESSAGE DEFINITION

4.1   Data Segment Clarification

       This section should be read in conjunction with the Segment
       Table which indicate mandatory, conditional and repeating
       requirements.

   UNH, Message header
       A service segment starting and uniquely identifying a message.
       The message type code for the Tank status report message is
       TANSTA.
       
       Note: Tank status report messages conforming to this document
       must contain the following data in segment UNH, composite S009:

       Data element  0065 TANSTA
                     0052 D
                     0054 97A
                     0051 UN

   BGM, Beginning of message
       A segment to indicate the beginning of a message and to
       transmit identifying number.

   DTM, Date/time/period
       A segment to indicate a date and time applying to the whole
       message, such as:
       - document or message date and or time

   NAD, Name and address
       A segment to identify a party's name, address, and function,
       such as:
       - message recipient
       - message sender


   Segment group 1: RFF-DTM
       A group of segments to specify a reference (and its related
       date and or time) which applies to the whole message.

      RFF, Reference
          A segment to specify a reference, such as:
          - reference to previous message

      DTM, Date/time/period
          A segment to indicate a date and or time related to the
          reference.


   Segment group 2: TDT-LOC-DTM-RFF-FTX
       A group of segments to provide details of the main carriage
       transport, including related locations and date and times.

      TDT, Details of transport
          A segment to specify transport details for the main
          carriage, such as:
          - discharge voyage number
          - radio call sign of the vessel
          - nationality of the vessel

      LOC, Place/location identification
          A segment to specify either the place of departure or the
          place of arrival for the main carriage.

      DTM, Date/time/period
          A segment to specify a date and or time related to the main
          carriage transport, such as:
          - estimated date/time of departure
          - estimated date/time of arrival

      RFF, Reference
          A segment to specify a reference related to the transport
          details, such as:
          - loading voyage number (if different from the voyage number
          assigned by the carrier or his agent in the TDT-segment).

      FTX, Free text
          A segment to specify supplementary information related to
          the main carriage transport.


   Segment group 3: LOC-MEA-DIM-FTX
       A group of segments to identify a tank or deadweight item by
       its place on or in the means of transport.

      LOC, Place/location identification
          A segment to specify the location of a tank or deadweight
          item on the means of transport, such as:
          - fore peak tank

      MEA, Measurements
          A segment to provide a measurement related to the tank or
          deadweight item, such as:
          - gross weight of tank contents
          - volume of liquid in the tank
          - specific gravity
          - percentage full

      DIM, Dimensions
          A segment to specify dimensions of the deadweight item, such
          as:
          - length expressed in 'longitudinal centre of gravity'
          - width expressed in 'transverse centre of gravity (from
          centerline)'
          - height expressed in 'vertical centre of gravity (from
          keel)'

      FTX, Free text
          A segment to describe the actual contents of tanks, such as
          lubricating oil, marine fuel oil, fresh water.

   UNT, Message trailer
       A service segment ending a message, giving the total number of
       segments in the message and the control reference number of the
       message.

4.2   Data segment index (Alphabetical sequence by tag)

          BGM Beginning of message
          DIM Dimensions
          DTM Date/time/period
          FTX Free text
          LOC Place/location identification
          MEA Measurements
          NAD Name and address
          RFF Reference
          TDT Details of transport
          UNH Message header
          UNT Message trailer

Contents of TANSTA